Glenwood Threshold Days by Year (CA008401800)

14 fixed thresholds counted per year at Glenwood (CA008401800): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Glenwood Thresholds

Glenwood: days with a maximum temperature at or below 0 C (32 F) in 39 years, most in 1972 with 95.
Glenwood: nights with a minimum temperature at or below 0 C (32 F) in 39 years, most in 1947 with 225.
Glenwood: nights with a minimum temperature at or below -10 C (14 F) in 39 years, most in 1972 with 92.
Glenwood: nights with a minimum temperature at or below -20 C (-4 F) in 38 years, most in 1938 with 30.
14 fixed thresholds have at least one qualifying day at Glenwood.

Days at or above 30 C (86 F)

31 years with a qualifying day

Days per year at Glenwood with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 9 in 1947.

Days at or above 30 C (86 F) per year at Glenwood
Year	Days	Decade average
1938	1	1
1939	1	1
1940	1	2.7
1941	3	2.7
1942	2	2.7
1943	1	2.7
1944	3	2.7
1945	1	2.7
1946	2	2.7
1947	9	2.7
1948	1	2.7
1949	4	2.7
1950	2	2.9
1951	2	2.9
1952	4	2.9
1953	4	2.9
1954	1	2.9
1955	2	2.9
1959	5	2.9
1960	2	3.3
1961	7	3.3
1962	1	3.3
1963	2	3.3
1964	1	3.3
1967	9	3.3
1968	1	3.3
1970	3	3.2
1972	1	3.2
1973	1	3.2
1975	6	3.2
1976	5	3.2

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

First to last qualifying date each year at Glenwood
Year	First date	Last date
1938	1938-08-01	1938-08-01
1939	1939-07-27	1939-07-27
1940	1940-08-05	1940-08-05
1941	1941-07-23	1941-07-25
1942	1942-07-01	1942-07-03
1943	1943-08-02	1943-08-02
1944	1944-06-29	1944-08-14
1945	1945-07-20	1945-07-20
1946	1946-06-24	1946-08-03
1947	1947-06-23	1947-08-15
1948	1948-09-07	1948-09-07
1949	1949-06-18	1949-07-30
1950	1950-07-12	1950-07-13
1951	1951-06-21	1951-07-10
1952	1952-07-08	1952-08-12
1953	1953-07-13	1953-07-21
1954	1954-06-23	1954-06-23
1955	1955-07-10	1955-07-11
1959	1959-07-06	1959-07-27
1960	1960-06-29	1960-08-21
1961	1961-06-21	1961-08-20
1962	1962-06-30	1962-06-30
1963	1963-07-13	1963-07-14
1964	1964-07-15	1964-07-15
1967	1967-06-04	1967-08-17
1968	1968-07-10	1968-07-10
1970	1970-07-27	1970-08-15
1972	1972-07-17	1972-07-17
1973	1973-07-02	1973-07-02
1975	1975-07-12	1975-07-21
1976	1976-06-06	1976-08-22

Every Fixed Threshold

Fixed thresholds at Glenwood
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	31	9	1947	5
35 C (95 F): Days	1	2	1952	2
90 F (32.2 C): Days	8	3	1947	1
0 C (32 F): Ice days (max	39	95	1972	68
0 C (32 F): Frost days (min	39	225	1947	197
-10 C (14 F): Days with min	39	92	1972	69
-20 C (-4 F): Days with min	38	30	1938	11
-30 C (-22 F): Days with min	9	5	1938	3
20 C (68 F): Tropical nights (min	6	1	1942	1
10 mm (0.39 in): Days with 10 mm or more rain	38	45	1944	38
25 mm (0.98 in): Days with 25 mm or more rain	37	11	1962	5
50 mm (1.97 in): Days with 50 mm or more rain	12	2	1966	1
10 cm (3.9 in): Days with 10 cm or more snowfall	38	18	1944	8
25 cm (9.8 in): Days with 25 cm or more snowfall	23	5	1965	2

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1938.

Download the Data

Data for Glenwood 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).

Glenwood Threshold Days by Year (CA008401800)

Key Facts for Glenwood Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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