Wilson Threshold Days by Year (USC00037912)

15 fixed thresholds counted per year at Wilson (USC00037912): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Wilson Thresholds

Wilson: days with 10 mm (0.39 in) or more of precipitation in 20 years, most in 1927 with 54.
Wilson: days with 25 mm (0.98 in) or more of precipitation in 20 years, most in 1945 with 28.
Wilson: days with 50 mm (1.97 in) or more of precipitation in 20 years, most in 1927 with 6.
Wilson: days with a maximum temperature at or above 30 C (86 F) in 19 years, most in 1941 with 131.
15 fixed thresholds have at least one qualifying day at Wilson.

Days at or above 30 C (86 F)

19 years with a qualifying day

Days per year at Wilson with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 131 in 1941.

Days at or above 30 C (86 F) per year at Wilson
Year	Days	Decade average
1927	89	89
1928	91	89
1929	87	89
1930	105	106.6
1931	115	106.6
1932	98	106.6
1933	111	106.6
1934	117	106.6
1935	99	106.6
1936	112	106.6
1937	97	106.6
1938	105	106.6
1940	95	109.3
1941	131	109.3
1944	116	109.3
1945	95	109.3
1953	128	106.7
1955	103	106.7
1958	89	106.7

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

First to last qualifying date each year at Wilson
Year	First date	Last date
1927	1927-05-20	1927-10-28
1928	1928-05-10	1928-10-14
1929	1929-03-24	1929-09-29
1930	1930-04-10	1930-10-11
1931	1931-05-16	1931-10-26
1932	1932-04-21	1932-09-21
1933	1933-05-19	1933-10-29
1934	1934-04-26	1934-10-24
1935	1935-05-11	1935-10-16
1936	1936-03-27	1936-09-28
1937	1937-04-17	1937-10-30
1938	1938-02-10	1938-10-18
1940	1940-04-01	1940-10-27
1941	1941-04-12	1941-10-22
1944	1944-05-11	1944-10-06
1945	1945-03-16	1945-09-30
1953	1953-04-09	1953-10-22
1955	1955-04-16	1955-11-15
1958	1958-05-14	1958-09-26

Every Fixed Threshold

Fixed thresholds at Wilson
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	19	131	1941	89
35 C (95 F): Days	19	68	1953	13
40 C (104 F): Days	2	7	1930	1
90 F (32.2 C): Days	19	106	1953	54
100 F (37.8 C): Days	11	26	1930	1
0 C (32 F): Ice days (max	16	18	1936	10
0 C (32 F): Frost days (min	19	83	1955	78
-10 C (14 F): Days with min	19	17	1940	8
-20 C (-4 F): Days with min	3	2	1940	2
20 C (68 F): Tropical nights (min	19	86	1941	61
25 C (77 F): Days with min	9	5	1930	1
10 mm (0.39 in): Days with 10 mm or more rain	20	54	1927	38
25 mm (0.98 in): Days with 25 mm or more rain	20	28	1945	15
50 mm (1.97 in): Days with 50 mm or more rain	20	6	1927	5
100 mm (3.94 in): Days with 100 mm or more rain	6	2	1930	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1927.

Download the Data

Data for Wilson 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 2025-12-31. Last revised 31 December 2025 (2025-12-31).

Wilson Threshold Days by Year (USC00037912)

Key Facts for Wilson Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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