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Built 2026-10-19 (19 October 2026)

Karuizawa Threshold Days by Year (JA000047622)

11 fixed thresholds counted per year at Karuizawa (JA000047622): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Karuizawa Thresholds

  • Karuizawa: days with 10 mm (0.39 in) or more of precipitation in 57 years, most in 1989 with 57.
  • Karuizawa: days with 25 mm (0.98 in) or more of precipitation in 57 years, most in 1989 with 20.
  • Karuizawa: days with a maximum temperature at or below 0 C (32 F) in 51 years, most in 1984 with 60.
  • Karuizawa: days with 50 mm (1.97 in) or more of precipitation in 51 years, most in 1959 with 7.
  • 11 fixed thresholds have at least one qualifying day at Karuizawa.
42 years with a qualifying day
Days at or above 30 C (86 F) per year at Karuizawa Days per year at Karuizawa with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 22 in 1995. 01020301965: 41966: 71967: 41968: 41970: 61971: 41973: 111975: 21977: 21978: 51979: 11980: 11983: 11984: 11985: 21987: 61988: 11995: 221996: 61998: 32000: 52002: 92003: 32004: 62006: 32007: 122008: 62009: 12010: 152011: 92012: 102013: 182014: 92015: 142016: 32017: 12018: 162019: 62021: 22022: 102025: 82026: 6196519711979198720002007201220172025
Days per year at Karuizawa with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 22 in 1995.
Days at or above 30 C (86 F) per year at Karuizawa
YearDaysDecade average
196544.8
196674.8
196744.8
196844.8
197064.4
197144.4
1973114.4
197524.4
197724.4
197854.4
197914.4
198012
198312
198412
198522
198762
198812
19952210.3
1996610.3
1998310.3
200055.6
200295.6
200335.6
200465.6
200635.6
2007125.6
200865.6
200915.6
20101510.1
2011910.1
20121010.1
20131810.1
2014910.1
20151410.1
2016310.1
2017110.1
20181610.1
2019610.1
202126.5
2022106.5
202586.5
202666.5
First to last qualifying date each year at Karuizawa For each year, a bar from the first to the last day at Karuizawa meeting 30 C (86 F). 1965: 28 July 1965 to 13 August 19651966: 26 June 1966 to 12 August 19661967: 15 July 1967 to 24 August 19671968: 19 July 1968 to 23 July 19681970: 24 July 1970 to 2 September 19701971: 4 July 1971 to 16 August 19711973: 11 July 1973 to 22 August 19731975: 31 July 1975 to 20 August 19751977: 4 August 1977 to 5 August 19771978: 2 August 1978 to 23 August 19781979: 1 August 1979 to 1 August 19791980: 22 July 1980 to 22 July 19801983: 3 August 1983 to 3 August 19831984: 4 July 1984 to 4 July 19841985: 18 July 1985 to 30 July 19851987: 6 June 1987 to 29 August 19871988: 9 July 1988 to 9 July 19881995: 24 July 1995 to 27 August 19951996: 17 July 1996 to 4 August 19961998: 3 July 1998 to 5 July 19982000: 1 July 2000 to 26 August 20002002: 8 July 2002 to 13 August 20022003: 23 August 2003 to 25 August 20032004: 6 July 2004 to 19 August 20042006: 14 July 2006 to 11 August 20062007: 5 August 2007 to 22 August 20072008: 23 July 2008 to 15 August 20082009: 15 July 2009 to 15 July 20092010: 19 July 2010 to 7 September 20102011: 28 June 2011 to 18 August 20112012: 16 July 2012 to 22 August 20122013: 8 July 2013 to 31 August 20132014: 25 July 2014 to 22 August 20142015: 14 July 2015 to 22 August 20152016: 6 July 2016 to 17 August 20162017: 12 July 2017 to 12 July 20172018: 15 July 2018 to 26 August 20182019: 30 July 2019 to 10 August 20192021: 19 July 2021 to 4 August 20212022: 28 June 2022 to 10 August 20222025: 17 June 2025 to 23 August 20252026: 14 July 2026 to 25 August 20261965197319831996200620122018JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Karuizawa meeting 30 C (86 F).
First to last qualifying date each year at Karuizawa
YearFirst dateLast date
19651965-07-281965-08-13
19661966-06-261966-08-12
19671967-07-151967-08-24
19681968-07-191968-07-23
19701970-07-241970-09-02
19711971-07-041971-08-16
19731973-07-111973-08-22
19751975-07-311975-08-20
19771977-08-041977-08-05
19781978-08-021978-08-23
19791979-08-011979-08-01
19801980-07-221980-07-22
19831983-08-031983-08-03
19841984-07-041984-07-04
19851985-07-181985-07-30
19871987-06-061987-08-29
19881988-07-091988-07-09
19951995-07-241995-08-27
19961996-07-171996-08-04
19981998-07-031998-07-05
20002000-07-012000-08-26
20022002-07-082002-08-13
20032003-08-232003-08-25
20042004-07-062004-08-19
20062006-07-142006-08-11
20072007-08-052007-08-22
20082008-07-232008-08-15
20092009-07-152009-07-15
20102010-07-192010-09-07
20112011-06-282011-08-18
20122012-07-162012-08-22
20132013-07-082013-08-31
20142014-07-252014-08-22
20152015-07-142015-08-22
20162016-07-062016-08-17
20172017-07-122017-07-12
20182018-07-152018-08-26
20192019-07-302019-08-10
20212021-07-192021-08-04
20222022-06-282022-08-10
20252025-06-172025-08-23
20262026-07-142026-08-25

Every Fixed Threshold

Fixed thresholds at Karuizawa
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days422219956
90 F (32.2 C): Days5420132
0 C (32 F): Ice days (max516019848
0 C (32 F): Frost days (min27182198181
-10 C (14 F): Days with min2765198411
20 C (68 F): Tropical nights (min101320257
10 mm (0.39 in): Days with 10 mm or more rain5757198926
25 mm (0.98 in): Days with 25 mm or more rain5720198921
50 mm (1.97 in): Days with 50 mm or more rain517195920
100 mm (3.94 in): Days with 100 mm or more rain172195810
200 mm (7.87 in): Days with 200 mm or more rain4119592

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1965.

Download the Data

  • Data for Karuizawa threshold days by year: CSV or JSON. Field meanings are on the data page.

Source: NOAA National Centers for Environmental Information, Global Historical Climatology Network Daily (GHCN-Daily). Records are computed by World Extreme Weather Monitor and are not official NOAA products. (US Government open data (NOAA NCEI)) Data as of 2026-10-17 (17 October 2026). Threshold counts are computed by this site.

Data as of . Last revised (2026-10-17).