Westminster Threshold Days by Year (USC00189440)

16 fixed thresholds counted per year at Westminster (USC00189440): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Westminster Thresholds

Westminster: days with 10 mm (0.39 in) or more of precipitation in 19 years, most in 1993 with 49.
Westminster: days with 25 mm (0.98 in) or more of precipitation in 19 years, most in 1993 with 20.
Westminster: days with a maximum temperature at or above 30 C (86 F) in 18 years, most in 1991 with 83.
Westminster: days with a maximum temperature at or above 90 F (32.2 C) in 18 years, most in 1988 with 58.
16 fixed thresholds have at least one qualifying day at Westminster.

Days at or above 30 C (86 F)

18 years with a qualifying day

Days per year at Westminster with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 83 in 1991.

Days at or above 30 C (86 F) per year at Westminster
Year	Days	Decade average
1980	68	58.8
1981	36	58.8
1982	36	58.8
1983	75	58.8
1984	48	58.8
1986	72	58.8
1987	76	58.8
1988	73	58.8
1989	45	58.8
1990	54	58.3
1991	83	58.3
1992	37	58.3
1993	68	58.3
1994	61	58.3
1995	64	58.3
1996	42	58.3
1997	48	58.3
1998	68	58.3

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

First to last qualifying date each year at Westminster
Year	First date	Last date
1980	1980-06-02	1980-09-23
1981	1981-05-25	1981-09-15
1982	1982-05-12	1982-09-03
1983	1983-04-28	1983-09-20
1984	1984-05-22	1984-09-25
1986	1986-05-06	1986-10-02
1987	1987-05-11	1987-09-20
1988	1988-05-14	1988-09-24
1989	1989-05-19	1989-09-21
1990	1990-04-26	1990-10-09
1991	1991-05-12	1991-09-18
1992	1992-05-03	1992-09-22
1993	1993-05-10	1993-09-18
1994	1994-04-26	1994-09-15
1995	1995-04-19	1995-09-14
1996	1996-05-18	1996-09-09
1997	1997-05-20	1997-09-07
1998	1998-03-30	1998-09-27

Every Fixed Threshold

Fixed thresholds at Westminster
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	18	83	1991	68
35 C (95 F): Days	17	25	1988	11
90 F (32.2 C): Days	18	58	1988	20
100 F (37.8 C): Days	3	6	1988	1
0 C (32 F): Ice days (max	18	24	1989	5
0 C (32 F): Frost days (min	18	132	1988	82
-10 C (14 F): Days with min	18	28	1989	4
-20 C (-4 F): Days with min	6	4	1994	1
20 C (68 F): Tropical nights (min	18	42	1991	23
25 C (77 F): Days with min	9	5	1998	5
10 mm (0.39 in): Days with 10 mm or more rain	19	49	1993	43
25 mm (0.98 in): Days with 25 mm or more rain	19	20	1993	11
50 mm (1.97 in): Days with 50 mm or more rain	14	5	1996	2
100 mm (3.94 in): Days with 100 mm or more rain	2	1	1991	1
10 cm (3.9 in): Days with 10 cm or more snowfall	17	4	1982	1
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 1980.

Download the Data

Data for Westminster 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).

Westminster Threshold Days by Year (USC00189440)

Key Facts for Westminster Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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