Webster Groves Threshold Days by Year (USC00238791)

20 fixed thresholds counted per year at Webster Groves (USC00238791): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Webster Groves Thresholds

Webster Groves: days with 10 mm (0.39 in) or more of precipitation in 23 years, most in 1951 with 42.
Webster Groves: days with 25 mm (0.98 in) or more of precipitation in 23 years, most in 1957 with 16.
Webster Groves: days with a maximum temperature at or above 30 C (86 F) in 21 years, most in 1953 with 108.
Webster Groves: days with a maximum temperature at or above 35 C (95 F) in 21 years, most in 1954 with 52.
20 fixed thresholds have at least one qualifying day at Webster Groves.

Days at or above 30 C (86 F)

21 years with a qualifying day

Days per year at Webster Groves with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 108 in 1953.

Days at or above 30 C (86 F) per year at Webster Groves
Year	Days	Decade average
1947	85	78
1948	91	78
1949	58	78
1951	63	90.1
1952	93	90.1
1953	108	90.1
1954	107	90.1
1956	102	90.1
1957	77	90.1
1958	70	90.1
1959	101	90.1
1960	88	89
1961	80	89
1962	92	89
1963	105	89
1964	94	89
1965	84	89
1966	80	89
1970	86	81.3
1971	81	81.3
1972	77	81.3

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

First to last qualifying date each year at Webster Groves
Year	First date	Last date
1947	1947-04-23	1947-10-22
1948	1948-04-07	1948-09-21
1949	1949-05-03	1949-09-04
1951	1951-04-28	1951-10-04
1952	1952-04-29	1952-10-13
1953	1953-04-09	1953-10-03
1954	1954-04-05	1954-10-05
1956	1956-03-06	1956-09-30
1957	1957-04-24	1957-09-04
1958	1958-05-17	1958-09-26
1959	1959-04-07	1959-09-24
1960	1960-04-22	1960-09-24
1961	1961-04-24	1961-10-12
1962	1962-05-10	1962-10-14
1963	1963-03-29	1963-10-22
1964	1964-04-16	1964-10-17
1965	1965-04-08	1965-09-19
1966	1966-05-05	1966-09-13
1970	1970-04-28	1970-09-25
1971	1971-06-02	1971-10-02
1972	1972-04-06	1972-09-21

Every Fixed Threshold

Fixed thresholds at Webster Groves
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	21	108	1953	77
35 C (95 F): Days	21	52	1954	14
40 C (104 F): Days	6	8	1954	4
45 C (113 F): Days	1	2	1954	2
90 F (32.2 C): Days	21	82	1953	48
100 F (37.8 C): Days	12	25	1954	1
110 F (43.3 C): Days	1	3	1954	3
0 C (32 F): Ice days (max	21	42	1963	21
0 C (32 F): Frost days (min	21	118	1952	110
-10 C (14 F): Days with min	21	43	1963	19
-20 C (-4 F): Days with min	10	6	1963	1
20 C (68 F): Tropical nights (min	21	62	1954	53
25 C (77 F): Days with min	10	5	1953	1
10 mm (0.39 in): Days with 10 mm or more rain	23	42	1951	34
25 mm (0.98 in): Days with 25 mm or more rain	23	16	1957	10
50 mm (1.97 in): Days with 50 mm or more rain	18	6	1949	1
100 mm (3.94 in): Days with 100 mm or more rain	4	1	1949	1
200 mm (7.87 in): Days with 200 mm or more rain	1	1	1957	1
10 cm (3.9 in): Days with 10 cm or more snowfall	8	3	1958	1
25 cm (9.8 in): Days with 25 cm or more snowfall	1	1	1958	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1947.

Download the Data

Data for Webster Groves 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).

Webster Groves Threshold Days by Year (USC00238791)

Key Facts for Webster Groves Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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