Patuxent River Threshold Days by Year (USC00186915)

15 fixed thresholds counted per year at Patuxent River (USC00186915): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Patuxent River Thresholds

Patuxent River: days with a maximum temperature at or above 30 C (86 F) in 13 years, most in 1980 with 73.
Patuxent River: days with a maximum temperature at or above 90 F (32.2 C) in 13 years, most in 1983 with 49.
Patuxent River: days with a maximum temperature at or below 0 C (32 F) in 13 years, most in 1977 with 23.
Patuxent River: nights with a minimum temperature at or below 0 C (32 F) in 13 years, most in 1981 with 90.
15 fixed thresholds have at least one qualifying day at Patuxent River.

Days at or above 30 C (86 F)

13 years with a qualifying day

Days per year at Patuxent River with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 73 in 1980.

Days at or above 30 C (86 F) per year at Patuxent River
Year	Days	Decade average
1977	43	40
1978	50	40
1979	27	40
1980	73	57.9
1981	51	57.9
1982	47	57.9
1983	72	57.9
1984	53	57.9
1985	52	57.9
1986	67	57.9
1987	59	57.9
1988	58	57.9
1989	47	57.9

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

First to last qualifying date each year at Patuxent River
Year	First date	Last date
1977	1977-05-05	1977-09-19
1978	1978-04-01	1978-09-21
1979	1979-06-23	1979-09-06
1980	1980-05-05	1980-09-23
1981	1981-05-25	1981-10-01
1982	1982-05-17	1982-09-18
1983	1983-04-28	1983-09-20
1984	1984-05-08	1984-09-26
1985	1985-03-29	1985-10-15
1986	1986-05-01	1986-10-04
1987	1987-05-12	1987-09-17
1988	1988-05-23	1988-09-23
1989	1989-03-28	1989-09-21

Every Fixed Threshold

Fixed thresholds at Patuxent River
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	13	73	1980	47
35 C (95 F): Days	12	17	1983	2
90 F (32.2 C): Days	13	49	1983	22
100 F (37.8 C): Days	3	2	1980	1
0 C (32 F): Ice days (max	13	23	1977	16
0 C (32 F): Frost days (min	13	90	1981	78
-10 C (14 F): Days with min	13	18	1977	8
20 C (68 F): Tropical nights (min	13	75	1986	68
25 C (77 F): Days with min	9	6	1983	2
10 mm (0.39 in): Days with 10 mm or more rain	13	49	1989	49
25 mm (0.98 in): Days with 25 mm or more rain	13	19	1979	14
50 mm (1.97 in): Days with 50 mm or more rain	13	5	1984	1
100 mm (3.94 in): Days with 100 mm or more rain	3	1	1983	1
10 cm (3.9 in): Days with 10 cm or more snowfall	9	4	1979	4
25 cm (9.8 in): Days with 25 cm or more snowfall	4	2	1987	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1977.

Download the Data

Data for Patuxent River 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).

Patuxent River Threshold Days by Year (USC00186915)

Key Facts for Patuxent River Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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