Ellsworth AFB Threshold Days by Year (USW00024006)

17 fixed thresholds counted per year at Ellsworth AFB (USW00024006): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Ellsworth AFB Thresholds

Ellsworth AFB: days with a maximum temperature at or above 30 C (86 F) in 23 years, most in 1955 with 62.
Ellsworth AFB: days with a maximum temperature at or above 35 C (95 F) in 23 years, most in 1949 with 24.
Ellsworth AFB: days with a maximum temperature at or above 90 F (32.2 C) in 23 years, most in 1955 with 40.
Ellsworth AFB: days with a maximum temperature at or below 0 C (32 F) in 23 years, most in 1955 with 68.
17 fixed thresholds have at least one qualifying day at Ellsworth AFB.

Days at or above 30 C (86 F)

23 years with a qualifying day

Days per year at Ellsworth AFB with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 62 in 1955.

Days at or above 30 C (86 F) per year at Ellsworth AFB
Year	Days	Decade average
1949	55	55
1950	33	43.6
1951	31	43.6
1952	54	43.6
1953	40	43.6
1954	52	43.6
1955	62	43.6
1956	49	43.6
1957	30	43.6
1958	29	43.6
1959	56	43.6
1960	48	40.4
1961	59	40.4
1962	29	40.4
1963	53	40.4
1964	39	40.4
1965	23	40.4
1966	52	40.4
1967	29	40.4
1968	26	40.4
1969	46	40.4
1970	58	58
2025	46	46

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

First to last qualifying date each year at Ellsworth AFB
Year	First date	Last date
1949	1949-05-28	1949-10-05
1950	1950-06-05	1950-09-07
1951	1951-05-23	1951-08-29
1952	1952-04-26	1952-09-27
1953	1953-06-11	1953-10-11
1954	1954-05-20	1954-10-08
1955	1955-05-01	1955-10-10
1956	1956-06-04	1956-10-16
1957	1957-06-30	1957-10-01
1958	1958-05-21	1958-09-23
1959	1959-06-06	1959-09-14
1960	1960-05-31	1960-09-20
1961	1961-05-10	1961-09-18
1962	1962-04-20	1962-09-11
1963	1963-05-07	1963-10-09
1964	1964-05-17	1964-09-08
1965	1965-05-30	1965-10-05
1966	1966-05-04	1966-09-12
1967	1967-07-09	1967-09-30
1968	1968-06-02	1968-09-14
1969	1969-05-26	1969-09-28
1970	1970-06-07	1970-09-19
2025	2025-05-10	2025-10-03

Every Fixed Threshold

Fixed thresholds at Ellsworth AFB
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	23	62	1955	46
35 C (95 F): Days	23	24	1949	13
40 C (104 F): Days	7	3	1949	1
90 F (32.2 C): Days	23	40	1955	27
100 F (37.8 C): Days	14	10	1949	3
0 C (32 F): Ice days (max	23	68	1955	33
0 C (32 F): Frost days (min	23	178	1950	114
-10 C (14 F): Days with min	23	74	1955	39
-20 C (-4 F): Days with min	23	22	1949	11
-30 C (-22 F): Days with min	5	2	1950	1
20 C (68 F): Tropical nights (min	23	20	1961	3
25 C (77 F): Days with min	3	2	1960	1
10 mm (0.39 in): Days with 10 mm or more rain	22	19	1965	9
25 mm (0.98 in): Days with 25 mm or more rain	21	7	1967	3
50 mm (1.97 in): Days with 50 mm or more rain	5	2	1962	1
10 cm (3.9 in): Days with 10 cm or more snowfall	15	6	1970	6
25 cm (9.8 in): Days with 25 cm or more snowfall	3	2	1970	2

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1949.

Download the Data

Data for Ellsworth AFB 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).

Ellsworth AFB Threshold Days by Year (USW00024006)

Key Facts for Ellsworth AFB Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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