Portsmouth Pease AFB Threshold Days by Year (USW00004743)

15 fixed thresholds counted per year at Portsmouth Pease AFB (USW00004743): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Portsmouth Pease AFB Thresholds

Portsmouth Pease AFB: days with a maximum temperature at or above 30 C (86 F) in 15 years, most in 2025 with 31.
Portsmouth Pease AFB: days with a maximum temperature at or above 90 F (32.2 C) in 15 years, most in 2025 with 17.
Portsmouth Pease AFB: days with a maximum temperature at or below 0 C (32 F) in 15 years, most in 1970 with 59.
Portsmouth Pease AFB: nights with a minimum temperature at or below 0 C (32 F) in 15 years, most in 1962 with 142.
15 fixed thresholds have at least one qualifying day at Portsmouth Pease AFB.

Days at or above 30 C (86 F)

15 years with a qualifying day

Days per year at Portsmouth Pease AFB with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 31 in 2025.

Days at or above 30 C (86 F) per year at Portsmouth Pease AFB
Year	Days	Decade average
1957	18	19.7
1958	14	19.7
1959	27	19.7
1960	15	15.5
1961	12	15.5
1962	7	15.5
1963	15	15.5
1964	28	15.5
1965	29	15.5
1966	10	15.5
1967	8	15.5
1968	12	15.5
1969	19	15.5
1970	22	22
2025	31	31

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

First to last qualifying date each year at Portsmouth Pease AFB
Year	First date	Last date
1957	1957-05-09	1957-09-16
1958	1958-06-30	1958-08-31
1959	1959-05-20	1959-09-24
1960	1960-06-17	1960-09-09
1961	1961-06-13	1961-09-22
1962	1962-04-27	1962-08-06
1963	1963-06-24	1963-10-07
1964	1964-05-07	1964-09-11
1965	1965-05-09	1965-09-23
1966	1966-06-27	1966-08-30
1967	1967-06-10	1967-08-18
1968	1968-06-06	1968-08-25
1969	1969-05-17	1969-09-01
1970	1970-05-10	1970-09-25
2025	2025-06-04	2025-10-06

Every Fixed Threshold

Fixed thresholds at Portsmouth Pease AFB
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	15	31	2025	31
35 C (95 F): Days	7	5	1964	3
90 F (32.2 C): Days	15	17	2025	17
100 F (37.8 C): Days	2	1	1964	1
0 C (32 F): Ice days (max	15	59	1970	37
0 C (32 F): Frost days (min	15	142	1962	116
-10 C (14 F): Days with min	15	53	1962	24
-20 C (-4 F): Days with min	11	9	1968	1
20 C (68 F): Tropical nights (min	14	18	2025	18
10 mm (0.39 in): Days with 10 mm or more rain	14	47	1958	32
25 mm (0.98 in): Days with 25 mm or more rain	14	17	1958	10
50 mm (1.97 in): Days with 50 mm or more rain	12	4	1960	2
100 mm (3.94 in): Days with 100 mm or more rain	4	1	1960	1
10 cm (3.9 in): Days with 10 cm or more snowfall	14	8	1958	7
25 cm (9.8 in): Days with 25 cm or more snowfall	9	3	1961	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1957.

Download the Data

Data for Portsmouth Pease 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).

Portsmouth Pease AFB Threshold Days by Year (USW00004743)

Key Facts for Portsmouth Pease AFB Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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