Unity Threshold Days by Year (USC00358780)

15 fixed thresholds counted per year at Unity (USC00358780): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Unity Thresholds

Unity: days with 10 mm (0.39 in) or more of precipitation in 40 years, most in 1909 with 10.
Unity: days with 10 cm (3.9 in) or more of snowfall in 35 years, most in 1942 with 7.
Unity: days with a maximum temperature at or above 30 C (86 F) in 26 years, most in 1961 with 62.
Unity: days with a maximum temperature at or above 90 F (32.2 C) in 26 years, most in 1961 with 49.
15 fixed thresholds have at least one qualifying day at Unity.

Days at or above 30 C (86 F)

26 years with a qualifying day

Days per year at Unity with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 62 in 1961.

Days at or above 30 C (86 F) per year at Unity
Year	Days	Decade average
1937	29	37
1938	41	37
1939	41	37
1940	58	35.4
1941	19	35.4
1942	40	35.4
1943	33	35.4
1944	26	35.4
1945	41	35.4
1946	31	35.4
1951	42	37.2
1953	41	37.2
1954	38	37.2
1956	30	37.2
1957	30	37.2
1959	42	37.2
1960	36	41.5
1961	62	41.5
1962	30	41.5
1963	38	41.5
1970	51	40.7
1972	39	40.7
1976	28	40.7
1977	52	40.7
1978	26	40.7
1979	48	40.7

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

First to last qualifying date each year at Unity
Year	First date	Last date
1937	1937-06-27	1937-09-15
1938	1938-05-25	1938-09-18
1939	1939-04-21	1939-08-27
1940	1940-06-11	1940-08-30
1941	1941-07-05	1941-08-16
1942	1942-06-29	1942-09-05
1943	1943-07-06	1943-09-25
1944	1944-06-30	1944-09-12
1945	1945-06-21	1945-09-14
1946	1946-06-21	1946-09-14
1951	1951-06-30	1951-09-16
1953	1953-07-05	1953-09-25
1954	1954-05-18	1954-09-25
1956	1956-06-27	1956-09-17
1957	1957-06-03	1957-09-16
1959	1959-06-12	1959-09-12
1960	1960-06-24	1960-08-20
1961	1961-05-25	1961-08-28
1962	1962-06-24	1962-09-06
1963	1963-06-16	1963-09-30
1970	1970-06-02	1970-08-31
1972	1972-05-30	1972-09-05
1976	1976-06-28	1976-09-28
1977	1977-05-31	1977-09-07
1978	1978-07-13	1978-09-03
1979	1979-06-03	1979-10-05

Every Fixed Threshold

Fixed thresholds at Unity
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	26	62	1961	48
35 C (95 F): Days	23	19	1940	7
40 C (104 F): Days	2	1	1937	1
90 F (32.2 C): Days	26	49	1961	27
100 F (37.8 C): Days	8	4	1940	1
0 C (32 F): Ice days (max	26	46	1962	33
0 C (32 F): Frost days (min	26	241	1942	176
-10 C (14 F): Days with min	26	66	1976	56
-20 C (-4 F): Days with min	24	19	1937	16
-30 C (-22 F): Days with min	9	4	1972	1
20 C (68 F): Tropical nights (min	1	1	1940	1
10 mm (0.39 in): Days with 10 mm or more rain	40	10	1909	3
25 mm (0.98 in): Days with 25 mm or more rain	6	2	1909	1
10 cm (3.9 in): Days with 10 cm or more snowfall	35	7	1942	1
25 cm (9.8 in): Days with 25 cm or more snowfall	4	1	1943	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1937.

Download the Data

Data for Unity 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).

Unity Threshold Days by Year (USC00358780)

Key Facts for Unity Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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