Station Name: Aikawa WMO Station Number: 47602 National I.D. Number: Country: JAPAN WMO Region: REGION II - ASIA Latitude: 38d 01m N Longitude: 138d 15m E Elevation: 35 m In the following tables, byr = beginning year of normals or extremes data period eyr = ending year of normals or extremes data period NA = Not Applicable, data not submitted or not computed * = value > 0 but < units resolution Ann-NCDC = annual value computed by NCDC from monthly values provided by Members ========================================================== The normals data and climate variable descriptions are presented in these tables as provided by the WMO Member country. ========================================================== Element 01: Dry Bulb Temperature (deg C) MEAN (Statistic 01): Mean Value STD_DEV (Statistic 03): Standard Deviation of Mean Value -------------------------- byr: 1961 1961 eyr: 1990 1990 Statistic: MEAN STD_DEV Month -------------------------- Jan 2.9 1.2 Feb 2.7 1.2 Mar 5.2 1.1 Apr 10.5 1.0 May 15.0 .8 Jun 18.9 .9 Jul 23.2 1.1 Aug 25.1 1.1 Sep 21.1 .9 Oct 15.6 .8 Nov 10.6 1.1 Dec 6.0 1.3 Annual 13.1 .5 Ann-NCDC 13.1 NA -------------------------- Element 02: Maximum Dry Bulb Temperature (deg C) MEAN (Statistic 01): Mean Value STD_DEV (Statistic 03): Standard Deviation of Mean Value MIN_MLY (Statistic 20): Minimum Monthly Value MAX_MLY (Statistic 26): Maximum Monthly Value ------------------------------------------ byr: 1961 1961 1961 1961 eyr: 1990 1990 1990 1990 Statistic: MEAN STD_DEV MIN_MLY MAX_MLY Month ------------------------------------------ Jan 5.4 1.4 2.8 8.0 Feb 5.2 1.5 2.1 8.7 Mar 8.4 1.2 4.9 10.2 Apr 14.4 1.1 11.0 17.1 May 19.0 1.0 17.5 20.8 Jun 22.5 .9 21.4 24.7 Jul 26.4 1.4 23.9 30.0 Aug 28.8 1.3 25.9 32.0 Sep 24.8 .9 23.3 27.1 Oct 19.4 .9 17.9 21.2 Nov 13.9 1.1 11.5 16.3 Dec 8.8 1.4 6.5 11.1 Annual 16.4 .5 15.6 17.5 Ann-NCDC 16.4 NA NA NA ------------------------------------------ Element 03: Minimum Dry Bulb Temperature (deg C) MEAN (Statistic 01): Mean Value STD_DEV (Statistic 03): Standard Deviation of Mean Value MIN_MLY (Statistic 20): Minimum Monthly Value MAX_MLY (Statistic 26): Maximum Monthly Value ------------------------------------------ byr: 1961 1961 1961 1961 eyr: 1990 1990 1990 1990 Statistic: MEAN STD_DEV MIN_MLY MAX_MLY Month ------------------------------------------ Jan .2 1.1 -2.3 2.0 Feb -.1 1.1 -2.1 2.5 Mar 1.8 .9 -1.2 3.2 Apr 6.5 1.0 4.5 8.7 May 11.0 .7 9.9 12.5 Jun 15.5 .9 14.4 18.0 Jul 20.2 1.0 18.4 22.6 Aug 21.9 1.0 19.5 24.4 Sep 17.8 1.0 16.1 20.2 Oct 12.0 .9 10.7 14.2 Nov 7.1 1.2 4.7 9.4 Dec 3.1 1.2 1.3 5.7 Annual 9.8 .5 8.8 11.1 Ann-NCDC 9.8 NA NA NA ------------------------------------------ Element 06: Precipitation (mm) MEANMLY (Statistic 15): Mean Monthly Value MIN_MLY (Statistic 20): Minimum Monthly Value QUIN20% (Statistic 22): First Quintile QUIN40% (Statistic 23): Second Quintile QUIN60% (Statistic 24): Third Quintile QUIN80% (Statistic 25): Fourth Quintile MAX_MLY (Statistic 26): Maximum Monthly Value ------------------------------------------------------------------ byr: 1961 1961 1961 1961 1961 1961 1961 eyr: 1990 1990 1990 1990 1990 1990 1990 Statistic: MEANMLY MIN_MLY QUIN20% QUIN40% QUIN60% QUIN80% MAX_MLY Month ------------------------------------------------------------------ Jan 137.5 55.0 106.1 123.7 138.7 164.0 270.9 Feb 101.8 47.5 75.0 91.1 104.8 126.5 166.0 Mar 89.8 43.5 76.0 81.2 90.5 100.0 191.0 Apr 102.1 25.0 82.2 96.2 106.5 124.7 176.1 May 99.2 28.5 63.0 85.7 105.2 124.5 232.7 Jun 125.3 38.5 69.7 89.6 122.5 172.5 421.5 Jul 161.3 9.5 91.0 132.7 176.9 204.0 447.4 Aug 137.4 7.5 48.2 84.6 145.5 254.5 327.0 Sep 160.7 45.5 106.5 131.0 169.5 207.1 318.9 Oct 127.0 15.0 83.7 111.0 143.3 169.7 202.5 Nov 158.8 53.0 118.8 143.9 171.3 188.5 259.0 Dec 162.3 71.0 112.7 136.7 177.7 209.2 293.5 Annual 1563.2 1125.0 1396.0 1469.0 1623.2 1758.0 2109.3 Ann-NCDC 1563.2 NA NA NA NA NA NA ------------------------------------------------------------------ Element 09: Snowfall (cm) MNDLYMX (Statistic 09): Mean Daily Maximum Value MEANMLY (Statistic 15): Mean Monthly Value MIN_MLY (Statistic 20): Minimum Monthly Value MAX_MLY (Statistic 26): Maximum Monthly Value ------------------------------------------ byr: 1961 1961 1961 1961 eyr: 1990 1990 1990 1990 Statistic: MNDLYMX MEANMLY MIN_MLY MAX_MLY Month ------------------------------------------ Jan 15 50 3 118 Feb 12 42 * 123 Mar 5 11 * 45 Apr * * 0 * May * * 0 * Jun 0 0 0 0 Jul 0 0 0 0 Aug 0 0 0 0 Sep 0 0 0 0 Oct * * 0 * Nov 1 1 0 12 Dec 8 18 * 97 Annual 19 121 16 275 Ann-NCDC NA 122.0 NA NA ------------------------------------------ Element 10: Snow Depth (cm) MAX_VAL (Statistic 04): Maximum Value ------------------ byr: 1961 eyr: 1990 Month ------------------ Jan 20 Feb 18 Mar 6 Apr * May 0 Jun 0 Jul 0 Aug 0 Sep 0 Oct 0 Nov 1 Dec 8 Annual 25 Ann-NCDC NA ------------------ Element 11: Relative Humidity (%) MEAN (Statistic 01): Mean Value STD_DEV (Statistic 03): Standard Deviation of Mean Value MN03LST (Statistic 73): Mean of Observations at 0300 LST MN09LST (Statistic 79): Mean of Observations at 0900 LST MN15LST (Statistic 85): Mean of Observations at 1500 LST MN21LST (Statistic 91): Mean of Observations at 2100 LST ---------------------------------------------------------- byr: 1961 1961 1961 1961 1961 1961 eyr: 1990 1990 1990 1990 1990 1990 Statistic: MEAN STD_DEV MN03LST MN09LST MN15LST MN21LST Month ---------------------------------------------------------- Jan 71 4 71 71 69 72 Feb 70 4 71 69 67 71 Mar 67 3 69 65 63 69 Apr 69 4 72 67 65 72 May 74 4 77 72 70 78 Jun 81 4 84 78 75 84 Jul 83 4 86 81 77 86 Aug 80 4 84 78 73 84 Sep 76 3 81 73 70 80 Oct 71 4 76 68 65 75 Nov 70 4 73 69 66 72 Dec 71 5 71 71 69 71 Annual 74 3 76 72 69 76 Ann-NCDC 73.6 NA 76.3 71.8 69.1 76.2 ---------------------------------------------------------- Element 12: Sea Level Pressure (hPa) MEAN (Statistic 01): Mean Value STD_DEV (Statistic 03): Standard Deviation of Mean Value -------------------------- byr: 1961 1961 eyr: 1990 1990 Statistic: MEAN STD_DEV Month -------------------------- Jan 1016.7 3.3 Feb 1017.5 2.3 Mar 1016.9 1.8 Apr 1016.1 1.9 May 1012.2 1.2 Jun 1009.3 1.3 Jul 1008.5 1.3 Aug 1009.0 1.5 Sep 1012.8 1.2 Oct 1017.3 1.4 Nov 1019.1 1.9 Dec 1018.0 2.2 Annual 1014.5 .5 Ann-NCDC 1014.4 NA -------------------------- Element 13: Station Pressure (hPa) MEAN (Statistic 01): Mean Value STD_DEV (Statistic 03): Standard Deviation of Mean Value -------------------------- byr: 1961 1961 eyr: 1990 1990 Statistic: MEAN STD_DEV Month -------------------------- Jan 1012.3 3.3 Feb 1013.1 2.3 Mar 1012.5 1.8 Apr 1011.8 1.9 May 1008.0 1.2 Jun 1005.1 1.3 Jul 1004.4 1.3 Aug 1005.0 1.5 Sep 1008.7 1.1 Oct 1013.1 1.4 Nov 1014.8 1.9 Dec 1013.6 2.2 Annual 1010.2 .5 Ann-NCDC 1010.2 NA -------------------------- Element 14: Vapor Pressure (hPa) MEAN (Statistic 01): Mean Value STD_DEV (Statistic 03): Standard Deviation of Mean Value -------------------------- byr: 1961 1961 eyr: 1990 1990 Statistic: MEAN STD_DEV Month -------------------------- Jan 5.5 .6 Feb 5.3 .6 Mar 6.0 .5 Apr 8.9 .8 May 12.6 .8 Jun 17.5 1.1 Jul 23.4 1.7 Aug 25.5 1.5 Sep 19.5 1.3 Oct 13.0 1.0 Nov 9.3 .9 Dec 6.8 .7 Annual 12.8 .5 Ann-NCDC 12.8 NA -------------------------- Element 15: Sunshine %OFPOSS (Statistic 37): Percent of Possible MN_#HRS (Statistic 44): Mean Number of Hours -------------------------- byr: 1961 1961 eyr: 1990 1990 Statistic: %OFPOSS MN_#HRS Month -------------------------- Jan 17.0 50.2 Feb 25.0 74.5 Mar 38.0 140.8 Apr 46.0 180.0 May 47.0 208.5 Jun 39.0 173.5 Jul 38.0 173.0 Aug 51.0 215.3 Sep 41.0 152.8 Oct 44.0 152.7 Nov 30.0 91.1 Dec 18.0 52.9 Annual 38.0 1665.2 Ann-NCDC NA 1665.3 -------------------------- Element 16: Wind Speed (m/sec) MEAN (Statistic 01): Mean Value ------------------ byr: 1975 eyr: 1990 Month ------------------ Jan 6.7 Feb 5.8 Mar 4.7 Apr 3.4 May 2.9 Jun 2.5 Jul 2.4 Aug 2.6 Sep 3.0 Oct 3.9 Nov 4.7 Dec 5.9 Annual 4.1 Ann-NCDC 4.0 ------------------ Element 17: Wind Direction (degrees) Statistic 38: Frequency Qualifier: 022.5 degrees Qualifier: 045.0 degrees Qualifier: 067.5 degrees Qualifier: 090.0 degrees Qualifier: 112.5 degrees Qualifier: 135.0 degrees Qualifier: 157.5 degrees Qualifier: 180.0 degrees Qualifier: 202.5 degrees ---------------------------------------------------------------------------------- byr: 1975 1975 1975 1975 1975 1975 1975 1975 1975 eyr: 1990 1990 1990 1990 1990 1990 1990 1990 1990 Qualifier: 022.5 045.0 067.5 090.0 112.5 135.0 157.5 180.0 202.5 Month ---------------------------------------------------------------------------------- Jan .020 .010 .010 .020 .050 .120 .010 .010 .010 Feb .030 .010 .010 .030 .060 .120 .020 .020 .010 Mar .010 .010 .010 .030 .070 .190 .040 .020 .010 Apr * .010 * .020 .070 .280 .050 .030 .020 May .010 * .010 .020 .070 .280 .060 .030 .030 Jun .010 * * .020 .090 .290 .050 .020 .020 Jul .010 * * .020 .080 .310 .060 .030 .020 Aug .010 .010 * .030 .090 .330 .050 .030 .020 Sep .020 .010 .020 .060 .120 .350 .040 .020 .010 Oct .020 .010 .020 .050 .110 .290 .030 .020 .010 Nov .020 .010 .010 .040 .080 .220 .040 .020 .010 Dec .020 .010 .010 .010 .060 .140 .020 .020 .010 Annual .010 .010 .010 .030 .080 .240 .040 .020 .020 Ann-NCDC NA NA NA NA NA NA NA NA NA ---------------------------------------------------------------------------------- Element 17: Wind Direction (degrees) Statistic 38: Frequency Qualifier: 225.0 degrees Qualifier: 247.5 degrees Qualifier: 270.0 degrees Qualifier: 292.5 degrees Qualifier: 315.0 degrees Qualifier: 337.5 degrees Qualifier: 360.0 degrees ------------------------------------------------------------------ byr: 1975 1975 1975 1975 1975 1975 1975 eyr: 1990 1990 1990 1990 1990 1990 1990 Qualifier: 225.0 247.5 270.0 292.5 315.0 337.5 360.0 Month ------------------------------------------------------------------ Jan * .010 .070 .120 .280 .190 .070 Feb .010 .010 .050 .130 .250 .180 .070 Mar .010 .010 .060 .130 .200 .150 .050 Apr .010 .010 .060 .120 .130 .130 .030 May .010 .010 .040 .100 .140 .150 .030 Jun .010 .020 .030 .080 .140 .180 .030 Jul .020 .020 .030 .080 .140 .160 .020 Aug .020 .010 .030 .080 .110 .150 .030 Sep .010 .010 .030 .060 .090 .110 .050 Oct .010 .010 .050 .080 .120 .120 .060 Nov .010 .010 .080 .100 .160 .130 .070 Dec .010 .010 .090 .130 .220 .160 .070 Annual .010 .010 .050 .100 .170 .150 .050 Ann-NCDC NA NA NA NA NA NA NA ------------------------------------------------------------------ Element 17: Wind Direction (degrees) PREVAIL (Statistic 41): Prevailing ------------------ byr: 1975 eyr: 1990 Month ------------------ Jan 315.0 Feb 315.0 Mar 315.0 Apr 135.0 May 135.0 Jun 135.0 Jul 135.0 Aug 135.0 Sep 135.0 Oct 135.0 Nov 135.0 Dec 315.0 Annual 135.0 Ann-NCDC NA ------------------ Element 20: Sky Cover (Cloud Cover) (okta) MEAN (Statistic 01): Mean Value ------------------ byr: 1961 eyr: 1990 Month ------------------ Jan 7.3 Feb 7.0 Mar 6.1 Apr 5.2 May 5.2 Jun 5.9 Jul 5.8 Aug 4.7 Sep 5.6 Oct 5.2 Nov 6.0 Dec 7.0 Annual 5.9 Ann-NCDC 5.9 ------------------ Element 51: Number Days with Thunder (count) MEANMLY (Statistic 15): Mean Monthly Value ------------------ byr: 1961 eyr: 1990 Month ------------------ Jan 2.3 Feb 1.4 Mar .7 Apr .9 May 1.0 Jun 1.9 Jul 1.6 Aug 2.6 Sep 2.8 Oct 3.5 Nov 5.1 Dec 3.9 Annual 27.8 Ann-NCDC 27.7 ------------------ Element 56: Number Days with Snowfall (count) MEANMLY (Statistic 15): Mean Monthly Value ------------------ byr: 1961 eyr: 1990 Month ------------------ Jan 23.2 Feb 20.0 Mar 12.3 Apr 1.1 May .0 Jun .0 Jul .0 Aug .0 Sep .0 Oct .0 Nov 2.8 Dec 13.5 Annual 73.0 Ann-NCDC 72.9 ------------------ Element 73: Number Days with no Sunshine (count) MEANMLY (Statistic 15): Mean Monthly Value ------------------ byr: 1961 eyr: 1990 Month ------------------ Jan 6.8 Feb 4.0 Mar 3.4 Apr 4.4 May 4.1 Jun 5.1 Jul 5.1 Aug 2.5 Sep 4.7 Oct 3.7 Nov 5.4 Dec 7.3 Annual 56.6 Ann-NCDC 56.5 ------------------ Element 83: Number Days Maximum Temperature GE Threshold (count) Statistic 15: Mean Monthly Value Qualifier: 25.0 deg C Qualifier: 30.0 deg C -------------------------- byr: 1961 1961 eyr: 1990 1990 Qualifier: 25.0 30.0 Month -------------------------- Jan .0 .0 Feb .0 .0 Mar .0 .0 Apr .2 .0 May 1.4 .0 Jun 4.8 .2 Jul 20.1 4.8 Aug 29.1 10.1 Sep 13.9 1.4 Oct .4 .0 Nov .0 .0 Dec .0 .0 Annual 69.9 16.5 Ann-NCDC 69.9 16.5 -------------------------- Element 86: Number Days Minimum Temperature GE Threshold (count) Qualifier: 25.0 deg C MEANMLY (Statistic 15): Mean Monthly Value ------------------ byr: 1961 eyr: 1990 Month ------------------ Jan .0 Feb .0 Mar .0 Apr .0 May .0 Jun .0 Jul .6 Aug 2.2 Sep .1 Oct .0 Nov .0 Dec .0 Annual 2.9 Ann-NCDC 2.9 ------------------ Element 87: Number Days Mean Temperature GE Threshold (count) Qualifier: 25.0 deg C MEANMLY (Statistic 15): Mean Monthly Value ------------------ byr: 1961 eyr: 1990 Month ------------------ Jan .0 Feb .0 Mar .0 Apr .0 May .0 Jun .1 Jul 8.6 Aug 17.0 Sep 2.4 Oct .0 Nov .0 Dec .0 Annual 28.1 Ann-NCDC 28.1 ------------------ Element 91: Number Days Maximum Temperature LT Threshold (count) Qualifier: 0.0 deg C MEANMLY (Statistic 15): Mean Monthly Value ------------------ byr: 1961 eyr: 1990 Month ------------------ Jan 1.0 Feb 1.0 Mar .2 Apr .0 May .0 Jun .0 Jul .0 Aug .0 Sep .0 Oct .0 Nov .0 Dec .1 Annual 2.3 Ann-NCDC 2.3 ------------------ Element 93: Number Days Minimum Temperature LT Threshold (count) Qualifier: 0.0 deg C MEANMLY (Statistic 15): Mean Monthly Value ------------------ byr: 1961 eyr: 1990 Month ------------------ Jan 15.5 Feb 15.0 Mar 7.9 Apr .4 May .0 Jun .0 Jul .0 Aug .0 Sep .0 Oct .0 Nov .1 Dec 3.9 Annual 42.7 Ann-NCDC 42.8 ------------------ Element 95: Number Days with Precipitation GE Threshold (count) Statistic 15: Mean Monthly Value Qualifier: 0.5 mm Qualifier: 1.0 mm Qualifier: 10.0 mm Qualifier: 30.0 mm Qualifier: 50.0 mm Qualifier: 70.0 mm Qualifier: 100.0 mm ------------------------------------------------------------------ byr: 1968 1961 1961 1961 1961 1961 1961 eyr: 1990 1990 1990 1990 1990 1990 1990 Qualifier: 0.5 1.0 10.0 30.0 50.0 70.0 100.0 Month ------------------------------------------------------------------ Jan 23.3 20.8 4.7 .2 .0 .0 .0 Feb 19.4 16.8 2.9 .2 .0 .0 .0 Mar 17.1 15.2 2.6 .1 * .0 .0 Apr 12.1 11.1 4.0 .4 * .0 .0 May 10.6 9.4 3.6 .6 .1 * .0 Jun 11.0 9.8 3.9 1.0 .4 .1 .1 Jul 12.0 10.6 4.7 1.6 .6 .2 .1 Aug 9.0 8.2 3.8 1.3 .6 .3 .1 Sep 12.6 12.1 5.7 1.4 .2 .1 * Oct 14.3 12.8 4.8 .5 .1 .1 .0 Nov 18.9 17.2 6.6 .3 .0 .0 .0 Dec 22.8 21.2 5.9 .2 .0 .0 .0 Annual 183.2 165.2 53.1 7.9 2.0 .8 .3 Ann-NCDC 183.1 165.2 53.2 7.8 2.0 0.8 0.3 ------------------------------------------------------------------ Element BH: Number Days Mean Temperature LT Threshold (count) Qualifier: 0.0 deg C MEANMLY (Statistic 15): Mean Monthly Value ------------------ byr: 1961 eyr: 1990 Month ------------------ Jan 4.0 Feb 5.2 Mar 1.0 Apr .0 May .0 Jun .0 Jul .0 Aug .0 Sep .0 Oct .0 Nov .0 Dec .6 Annual 10.8 Ann-NCDC 10.8 ------------------ Element BJ: Number Days with Fog (count) MEANMLY (Statistic 15): Mean Monthly Value ------------------ byr: 1961 eyr: 1990 Month ------------------ Jan .0 Feb .0 Mar .1 Apr 1.7 May 2.1 Jun 1.4 Jul 1.8 Aug .1 Sep .0 Oct .0 Nov .0 Dec .0 Annual 7.2 Ann-NCDC 7.2 ------------------ Element BM: Number Days with Daily Maximum Wind Speed GE Threshold (count) Statistic 15: Mean Monthly Value Qualifier: 10.0 m/sec Qualifier: 15.0 m/sec Qualifier: 20.0 m/sec Qualifier: 30.0 m/sec ------------------------------------------ byr: 1975 1975 1975 1975 eyr: 1990 1990 1990 1990 Qualifier: 10.0 15.0 20.0 30.0 Month ------------------------------------------ Jan 22.7 5.6 .1 .0 Feb 15.8 3.4 .2 .0 Mar 11.6 1.1 .1 .0 Apr 5.3 .3 .0 .0 May 1.8 .1 .0 .0 Jun .6 .0 .0 .0 Jul .1 .0 .0 .0 Aug 1.0 .1 .1 .0 Sep 1.8 .3 .1 .0 Oct 7.7 1.2 .2 .0 Nov 12.3 2.6 .0 .0 Dec 18.7 4.7 .2 .0 Annual 99.3 19.4 .9 .0 Ann-NCDC 99.4 19.4 1.0 0.0 ------------------------------------------ Element BT: Number Days with Occurrence of Rain (count) MEANMLY (Statistic 15): Mean Monthly Value ------------------ byr: 1968 eyr: 1990 Month ------------------ Jan 29.6 Feb 25.7 Mar 24.4 Apr 17.1 May 16.3 Jun 16.7 Jul 16.8 Aug 14.6 Sep 18.2 Oct 19.7 Nov 23.3 Dec 28.4 Annual 251.0 Ann-NCDC 250.8 ------------------ Element BW: Number Days with Daily Maximum Snow Cover GE Threshold (count) Statistic 15: Mean Monthly Value Qualifier: 0.0 cm Qualifier: 5.0 cm Qualifier: 10.0 cm Qualifier: 20.0 cm Qualifier: 50.0 cm Qualifier: 100.0 cm ---------------------------------------------------------- byr: 1961 1961 1961 1961 1961 1961 eyr: 1990 1990 1990 1990 1990 1990 Qualifier: 0.0 5.0 10.0 20.0 50.0 100.0 Month ---------------------------------------------------------- Jan 17.7 8.5 5.2 2.4 .0 .0 Feb 16.2 8.6 4.9 1.9 .1 .0 Mar 6.5 1.5 .9 .2 .0 .0 Apr .2 .0 .0 .0 .0 .0 May .0 .0 .0 .0 .0 .0 Jun .0 .0 .0 .0 .0 .0 Jul .0 .0 .0 .0 .0 .0 Aug .0 .0 .0 .0 .0 .0 Sep .0 .0 .0 .0 .0 .0 Oct .0 .0 .0 .0 .0 .0 Nov .5 * .0 .0 .0 .0 Dec 6.3 2.3 1.4 .4 .0 .0 Annual 47.3 20.9 12.4 5.0 .1 .0 Ann-NCDC 47.4 20.9 12.4 4.9 0.1 0.0 ----------------------------------------------------------