Thief River Falls Threshold Days by Year (USC00218243)

18 fixed thresholds counted per year at Thief River Falls (USC00218243): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Thief River Falls Thresholds

Thief River Falls: days with a maximum temperature at or above 30 C (86 F) in 47 years, most in 1961 with 41.
Thief River Falls: days with a maximum temperature at or above 90 F (32.2 C) in 47 years, most in 1931 with 27.
Thief River Falls: days with a maximum temperature at or below 0 C (32 F) in 47 years, most in 1950 with 130.
Thief River Falls: nights with a minimum temperature at or below 0 C (32 F) in 46 years, most in 1917 with 240.
18 fixed thresholds have at least one qualifying day at Thief River Falls.

Days at or above 30 C (86 F)

47 years with a qualifying day

Days per year at Thief River Falls with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 41 in 1961.

Days at or above 30 C (86 F) per year at Thief River Falls
Year	Days	Decade average
1912	20	22
1913	22	22
1915	13	22
1916	24	22
1917	32	22
1918	17	22
1919	26	22
1920	29	19.9
1921	31	19.9
1922	26	19.9
1923	29	19.9
1924	6	19.9
1925	18	19.9
1926	21	19.9
1927	12	19.9
1928	8	19.9
1929	19	19.9
1930	26	29.7
1931	37	29.7
1932	26	29.7
1946	11	15
1948	19	15
1949	15	15
1950	8	11.7
1951	8	11.7
1952	16	11.7
1953	12	11.7
1954	8	11.7
1955	25	11.7
1956	7	11.7
1957	10	11.7
1958	8	11.7
1959	15	11.7
1960	20	21.4
1961	41	21.4
1962	7	21.4
1963	24	21.4
1964	24	21.4
1965	6	21.4
1966	29	21.4
1967	26	21.4
1968	9	21.4
1969	28	21.4
1970	31	20.5
1971	10	20.5
2025	8	16.5
2026	25	16.5

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

First to last qualifying date each year at Thief River Falls
Year	First date	Last date
1912	1912-05-09	1912-09-09
1913	1913-06-01	1913-09-07
1915	1915-07-12	1915-09-07
1916	1916-07-05	1916-09-03
1917	1917-05-17	1917-09-18
1918	1918-05-05	1918-09-07
1919	1919-05-27	1919-09-07
1920	1920-06-07	1920-10-06
1921	1921-05-21	1921-09-01
1922	1922-06-04	1922-10-03
1923	1923-05-27	1923-09-03
1924	1924-07-06	1924-08-29
1925	1925-05-19	1925-09-03
1926	1926-05-05	1926-09-01
1927	1927-06-19	1927-09-14
1928	1928-05-22	1928-08-12
1929	1929-06-10	1929-09-01
1930	1930-05-21	1930-09-23
1931	1931-05-26	1931-09-12
1932	1932-05-13	1932-08-22
1946	1946-05-29	1946-08-19
1948	1948-05-19	1948-09-11
1949	1949-06-11	1949-08-24
1950	1950-06-06	1950-08-06
1951	1951-07-14	1951-08-01
1952	1952-04-26	1952-09-27
1953	1953-05-08	1953-08-31
1954	1954-06-13	1954-07-28
1955	1955-05-20	1955-08-21
1956	1956-06-09	1956-08-28
1957	1957-07-10	1957-08-08
1958	1958-05-12	1958-08-13
1959	1959-05-02	1959-08-19
1960	1960-07-08	1960-09-05
1961	1961-05-31	1961-09-01
1962	1962-08-02	1962-08-27
1963	1963-06-04	1963-08-21
1964	1964-05-21	1964-09-02
1965	1965-07-22	1965-08-16
1966	1966-05-21	1966-09-12
1967	1967-05-24	1967-09-04
1968	1968-06-03	1968-09-14
1969	1969-05-14	1969-09-12
1970	1970-05-17	1970-09-19
1971	1971-08-08	1971-09-07
2025	2025-05-11	2025-09-29
2026	2026-05-25	2026-08-06

Every Fixed Threshold

Fixed thresholds at Thief River Falls
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	47	41	1961	25
35 C (95 F): Days	26	10	1931	1
40 C (104 F): Days	1	1	1917	1
90 F (32.2 C): Days	47	27	1931	8
100 F (37.8 C): Days	4	1	1912	1
0 C (32 F): Ice days (max	47	130	1950	58
0 C (32 F): Frost days (min	46	240	1917	117
-10 C (14 F): Days with min	46	132	1950	56
-20 C (-4 F): Days with min	46	85	1950	30
-30 C (-22 F): Days with min	46	40	1917	4
-40 C (-40 F): Days with min	9	6	1912	1
20 C (68 F): Tropical nights (min	35	7	1931	4
10 mm (0.39 in): Days with 10 mm or more rain	37	28	1964	6
25 mm (0.98 in): Days with 25 mm or more rain	34	9	1964	1
50 mm (1.97 in): Days with 50 mm or more rain	18	2	1919	1
100 mm (3.94 in): Days with 100 mm or more rain	2	1	1919	1
10 cm (3.9 in): Days with 10 cm or more snowfall	18	7	1964	2
25 cm (9.8 in): Days with 25 cm or more snowfall	2	2	1966	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1912.

Download the Data

Data for Thief River Falls 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 2026-10-17. Last revised 17 October 2026 (2026-10-17).

Thief River Falls Threshold Days by Year (USC00218243)

Key Facts for Thief River Falls Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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