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Built 2026-10-18 (18 October 2026)

Annitowa Threshold Days by Year

4 fixed thresholds counted per year at Annitowa (ASN00015587): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Annitowa Thresholds

  • Annitowa: days with 10 mm (0.39 in) or more of precipitation in 29 years, most in 1977 with 21.
  • Annitowa: days with 25 mm (0.98 in) or more of precipitation in 25 years, most in 1977 with 8.
  • Annitowa: days with 50 mm (1.97 in) or more of precipitation in 15 years, most in 1977 with 3.
  • Annitowa: days with 100 mm (3.94 in) or more of precipitation in 2 years, most in 2001 with 1.
  • 4 fixed thresholds have at least one qualifying day at Annitowa.
29 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Annitowa Days per year at Annitowa with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 21 in 1977. 01020301966: 71967: 101968: 101969: 71970: 21976: 121977: 211978: 121979: 61980: 41981: 101982: 101983: 161984: 161985: 51986: 31987: 71988: 11989: 81990: 81991: 121993: 111996: 51997: 81998: 51999: 42001: 52002: 112003: 51966196919771980198319861989199319982002
Days per year at Annitowa with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 21 in 1977.
Days with 10 mm (0.39 in) or more of precipitation per year at Annitowa
YearDaysDecade average
196678.5
1967108.5
1968108.5
196978.5
1970210.6
19761210.6
19772110.6
19781210.6
1979610.6
198048
1981108
1982108
1983168
1984168
198558
198638
198778
198818
198988
199087.6
1991127.6
1993117.6
199657.6
199787.6
199857.6
199947.6
200157
2002117
200357
First to last qualifying date each year at Annitowa For each year, a bar from the first to the last day at Annitowa meeting 10 mm (0.39 in). 1966: 21 January 1966 to 5 December 19661967: 5 February 1967 to 29 October 19671968: 2 January 1968 to 24 December 19681969: 7 February 1969 to 23 December 19691970: 24 April 1970 to 28 November 19701976: 4 January 1976 to 10 December 19761977: 23 January 1977 to 17 December 19771978: 5 January 1978 to 24 December 19781979: 16 January 1979 to 31 December 19791980: 4 January 1980 to 28 May 19801981: 20 January 1981 to 20 November 19811982: 17 January 1982 to 29 December 19821983: 10 March 1983 to 21 December 19831984: 2 January 1984 to 10 December 19841985: 4 February 1985 to 23 November 19851986: 16 January 1986 to 2 July 19861987: 1 February 1987 to 28 December 19871988: 2 April 1988 to 2 April 19881989: 20 March 1989 to 14 December 19891990: 9 January 1990 to 22 May 19901991: 19 January 1991 to 9 December 19911993: 5 January 1993 to 15 December 19931996: 1 January 1996 to 18 December 19961997: 13 January 1997 to 20 December 19971998: 28 January 1998 to 20 December 19981999: 4 January 1999 to 18 December 19992001: 26 January 2001 to 15 December 20012002: 7 January 2002 to 25 February 20022003: 1 January 2003 to 28 December 200319661970197919831987199119982003JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Annitowa meeting 10 mm (0.39 in).
First to last qualifying date each year at Annitowa
YearFirst dateLast date
19661966-01-211966-12-05
19671967-02-051967-10-29
19681968-01-021968-12-24
19691969-02-071969-12-23
19701970-04-241970-11-28
19761976-01-041976-12-10
19771977-01-231977-12-17
19781978-01-051978-12-24
19791979-01-161979-12-31
19801980-01-041980-05-28
19811981-01-201981-11-20
19821982-01-171982-12-29
19831983-03-101983-12-21
19841984-01-021984-12-10
19851985-02-041985-11-23
19861986-01-161986-07-02
19871987-02-011987-12-28
19881988-04-021988-04-02
19891989-03-201989-12-14
19901990-01-091990-05-22
19911991-01-191991-12-09
19931993-01-051993-12-15
19961996-01-011996-12-18
19971997-01-131997-12-20
19981998-01-281998-12-20
19991999-01-041999-12-18
20012001-01-262001-12-15
20022002-01-072002-02-25
20032003-01-012003-12-28

Every Fixed Threshold

Fixed thresholds at Annitowa
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain292119775
25 mm (0.98 in): Days with 25 mm or more rain25819774
50 mm (1.97 in): Days with 50 mm or more rain15319771
100 mm (3.94 in): Days with 100 mm or more rain2120011

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1966.

Download the Data

  • Data for Annitowa 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 (2025-12-31).