Theilman 1SSW Threshold Days by Year (USC00218227)

19 fixed thresholds counted per year at Theilman 1SSW (USC00218227): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Theilman 1SSW Thresholds

Theilman 1SSW: days with 10 mm (0.39 in) or more of precipitation in 79 years, most in 2019 with 39.
Theilman 1SSW: days with 25 mm (0.98 in) or more of precipitation in 79 years, most in 2021 with 14.
Theilman 1SSW: nights with a minimum temperature at or below 0 C (32 F) in 55 years, most in 1997 with 193.
Theilman 1SSW: nights with a minimum temperature at or below -10 C (14 F) in 55 years, most in 2013 with 96.
19 fixed thresholds have at least one qualifying day at Theilman 1SSW.

Days at or above 30 C (86 F)

44 years with a qualifying day

Days per year at Theilman 1SSW with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 61 in 1980.

Days at or above 30 C (86 F) per year at Theilman 1SSW
Year	Days	Decade average
1963	43	35.4
1966	42	35.4
1967	23	35.4
1968	28	35.4
1969	41	35.4
1970	44	37.3
1971	33	37.3
1972	16	37.3
1973	16	37.3
1974	26	37.3
1975	45	37.3
1976	60	37.3
1977	55	37.3
1978	44	37.3
1979	34	37.3
1980	61	42
1981	23	42
1990	28	28.8
1991	50	28.8
1992	19	28.8
1997	18	28.8
2000	21	26.3
2003	40	26.3
2004	12	26.3
2005	38	26.3
2006	35	26.3
2007	41	26.3
2008	12	26.3
2009	11	26.3
2010	41	33
2011	31	33
2012	51	33
2013	33	33
2014	17	33
2015	16	33
2016	24	33
2017	30	33
2018	49	33
2019	38	33
2020	59	45
2021	56	45
2022	46	45
2025	26	45
2026	38	45

For each year, a bar from the first to the last day at Theilman 1SSW meeting 30 C (86 F).

First to last qualifying date each year at Theilman 1SSW
Year	First date	Last date
1963	1963-05-07	1963-10-06
1966	1966-05-26	1966-09-01
1967	1967-05-18	1967-10-02
1968	1968-04-30	1968-09-03
1969	1969-05-27	1969-09-16
1970	1970-04-29	1970-09-04
1971	1971-06-03	1971-09-08
1972	1972-05-17	1972-08-19
1973	1973-06-09	1973-08-31
1974	1974-04-26	1974-08-20
1975	1975-05-19	1975-10-13
1976	1976-06-05	1976-10-02
1977	1977-04-10	1977-09-04
1978	1978-05-26	1978-09-11
1979	1979-05-17	1979-08-31
1980	1980-04-21	1980-09-09
1981	1981-06-07	1981-09-11
1990	1990-05-07	1990-09-13
1991	1991-04-06	1991-09-02
1992	1992-05-01	1992-10-02
1997	1997-06-21	1997-10-04
2000	2000-05-05	2000-09-19
2003	2003-04-15	2003-09-17
2004	2004-04-29	2004-09-02
2005	2005-06-07	2005-09-22
2006	2006-05-29	2006-10-03
2007	2007-04-30	2007-10-08
2008	2008-06-21	2008-09-03
2009	2009-04-25	2009-08-15
2010	2010-05-25	2010-10-10
2011	2011-05-11	2011-09-13
2012	2012-05-19	2012-09-12
2013	2013-05-15	2013-09-12
2014	2014-05-27	2014-09-05
2015	2015-06-10	2015-09-17
2016	2016-05-07	2016-08-30
2017	2017-05-17	2017-09-25
2018	2018-05-08	2018-09-18
2019	2019-06-01	2019-10-01
2020	2020-05-27	2020-09-26
2021	2021-05-02	2021-10-02
2022	2022-05-10	2022-09-21
2025	2025-05-12	2025-10-05
2026	2026-05-16	2026-10-13

Every Fixed Threshold

Fixed thresholds at Theilman 1SSW
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	44	61	1980	38
35 C (95 F): Days	30	9	2021	2
90 F (32.2 C): Days	43	33	1980	16
100 F (37.8 C): Days	7	2	2012	1
0 C (32 F): Ice days (max	44	92	2014	42
0 C (32 F): Frost days (min	55	193	1997	110
-10 C (14 F): Days with min	55	96	2013	43
-20 C (-4 F): Days with min	55	49	2008	17
-30 C (-22 F): Days with min	44	14	2014	3
-40 C (-40 F): Days with min	5	2	2009	2
20 C (68 F): Tropical nights (min	55	27	1991	9
25 C (77 F): Days with min	9	3	1991	2
10 mm (0.39 in): Days with 10 mm or more rain	79	39	2019	18
25 mm (0.98 in): Days with 25 mm or more rain	79	14	2021	5
50 mm (1.97 in): Days with 50 mm or more rain	51	5	1991	1
100 mm (3.94 in): Days with 100 mm or more rain	12	2	1978	1
200 mm (7.87 in): Days with 200 mm or more rain	1	1	1978	1
10 cm (3.9 in): Days with 10 cm or more snowfall	32	9	2019	2
25 cm (9.8 in): Days with 25 cm or more snowfall	8	1	1971	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1963.

Download the Data

Data for Theilman 1SSW 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 2026-10-17. Last revised 17 October 2026 (2026-10-17).

Theilman 1SSW Threshold Days by Year (USC00218227)

Key Facts for Theilman 1SSW Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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