Dover AFB Threshold Days by Year (USW00013707)

16 fixed thresholds counted per year at Dover AFB (USW00013707): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Dover AFB Thresholds

Dover AFB: days with a maximum temperature at or above 30 C (86 F) in 21 years, most in 1957 with 60.
Dover AFB: days with a maximum temperature at or above 90 F (32.2 C) in 21 years, most in 1957 with 29.
Dover AFB: days with a maximum temperature at or below 0 C (32 F) in 21 years, most in 1958 with 31.
Dover AFB: nights with a minimum temperature at or below 0 C (32 F) in 21 years, most in 1960 with 103.
16 fixed thresholds have at least one qualifying day at Dover AFB.

Days at or above 30 C (86 F)

21 years with a qualifying day

Days per year at Dover AFB with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 60 in 1957.

Days at or above 30 C (86 F) per year at Dover AFB
Year	Days	Decade average
1951	35	43.8
1952	44	43.8
1953	46	43.8
1954	37	43.8
1955	41	43.8
1956	39	43.8
1957	60	43.8
1958	36	43.8
1959	56	43.8
1960	29	37.2
1961	44	37.2
1962	41	37.2
1963	32	37.2
1964	39	37.2
1965	59	37.2
1966	46	37.2
1967	17	37.2
1968	37	37.2
1969	28	37.2
1970	43	43
2025	34	34

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

First to last qualifying date each year at Dover AFB
Year	First date	Last date
1951	1951-05-16	1951-10-06
1952	1952-06-06	1952-09-13
1953	1953-06-05	1953-09-29
1954	1954-06-01	1954-10-13
1955	1955-05-05	1955-09-20
1956	1956-05-13	1956-09-23
1957	1957-04-21	1957-09-22
1958	1958-06-09	1958-09-26
1959	1959-05-07	1959-10-06
1960	1960-04-23	1960-09-09
1961	1961-04-25	1961-09-23
1962	1962-04-26	1962-10-12
1963	1963-05-09	1963-09-12
1964	1964-05-09	1964-09-11
1965	1965-05-04	1965-09-24
1966	1966-06-05	1966-09-05
1967	1967-06-10	1967-08-27
1968	1968-06-22	1968-10-03
1969	1969-04-27	1969-09-07
1970	1970-05-09	1970-09-27
2025	2025-06-12	2025-09-19

Every Fixed Threshold

Fixed thresholds at Dover AFB
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	21	60	1957	34
35 C (95 F): Days	16	9	1953	3
90 F (32.2 C): Days	21	29	1957	18
100 F (37.8 C): Days	5	2	1957	1
0 C (32 F): Ice days (max	21	31	1958	10
0 C (32 F): Frost days (min	21	103	1960	65
-10 C (14 F): Days with min	20	16	1963	3
20 C (68 F): Tropical nights (min	21	74	1959	54
25 C (77 F): Days with min	8	6	2025	6
10 mm (0.39 in): Days with 10 mm or more rain	20	47	1952	25
25 mm (0.98 in): Days with 25 mm or more rain	20	20	1958	9
50 mm (1.97 in): Days with 50 mm or more rain	15	5	1967	1
100 mm (3.94 in): Days with 100 mm or more rain	7	1	1952	1
200 mm (7.87 in): Days with 200 mm or more rain	1	1	1967	1
10 cm (3.9 in): Days with 10 cm or more snowfall	13	5	1966	1
25 cm (9.8 in): Days with 25 cm or more snowfall	1	1	1967	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1951.

Download the Data

Data for Dover 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).

Dover AFB Threshold Days by Year (USW00013707)

Key Facts for Dover AFB Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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