Thief River Falls Weather Records (USC00218243)
Record envelope, standing records and threshold days for Thief River Falls (USC00218243), Minnesota, United States, with 127 years of record.
Key Facts for Thief River Falls
- Thief River Falls (USC00218243) is a weather station in Minnesota, United States at 48.07 latitude and -96.18 longitude, 340 m (1,115 ft) above sea level.
- The station reports from 1900 to 2026, 127 years of record.
- 1,464 records set at Thief River Falls still stand.
- Records are tracked for tmax, tmin, prcp, snow: an element needs 30 years of data to be eligible.
- Thief River Falls set a daily record high minimum temperature of 15.0 C (59.0 F) on 26 September 2026 (provisional).
Provisional Records
Records set in the last 60 days are provisional until they clear the revision window.
About the Station
- Location: Minnesota, United States, 48.07 latitude, -96.18 longitude.
- Elevation: 340 m (1,115 ft).
- Period of record: 1900 to 2026, 127 years.
- Eligible elements: tmax, tmin, prcp, snow.
Daily Record Envelope and 2026
7 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 4.4 C (39.9 F) | -43.9 C (-47.0 F) | 3.3 C (37.9 F) | -33.9 C (-29.0 F) |
| Feb | 11.7 C (53.1 F) | -42.8 C (-45.0 F) | 4.4 C (39.9 F) | -26.7 C (-16.1 F) |
| Mar | 29.4 C (84.9 F) | -37.2 C (-35.0 F) | 10.6 C (51.1 F) | -25.6 C (-14.1 F) |
| Apr | 32.8 C (91.0 F) | -24.4 C (-11.9 F) | 28.3 C (82.9 F) | -13.9 C (7.0 F) |
| May | 37.8 C (100.0 F) | -10.6 C (12.9 F) | 32.8 C (91.0 F) | -5.0 C (23.0 F) |
| Jun | 38.9 C (102.0 F) | -3.3 C (26.1 F) | 32.2 C (90.0 F) | 7.2 C (45.0 F) |
| Jul | 42.2 C (108.0 F) | 1.1 C (34.0 F) | 34.4 C (93.9 F) | 7.8 C (46.0 F) |
| Aug | 37.2 C (99.0 F) | -1.1 C (30.0 F) | 30.6 C (87.1 F) | 7.2 C (45.0 F) |
| Sep | 37.2 C (99.0 F) | -9.4 C (15.1 F) | 29.4 C (84.9 F) | 5.6 C (42.1 F) |
| Oct | 32.2 C (90.0 F) | -23.9 C (-11.0 F) | 21.1 C (70.0 F) | 1.1 C (34.0 F) |
| Nov | 21.7 C (71.1 F) | -34.4 C (-29.9 F) | n/a | n/a |
| Dec | 12.2 C (54.0 F) | -40.0 C (-40.0 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1903 | 13 |
| 1905 | 7 |
| 1906 | 14 |
| 1911 | 4 |
| 1912 | 46 |
| 1913 | 38 |
| 1914 | 29 |
| 1915 | 26 |
| 1916 | 31 |
| 1917 | 60 |
| 1918 | 46 |
| 1919 | 54 |
| 1920 | 21 |
| 1921 | 33 |
| 1922 | 35 |
| 1923 | 36 |
| 1924 | 29 |
| 1925 | 32 |
| 1926 | 32 |
| 1927 | 29 |
| 1928 | 36 |
| 1929 | 27 |
| 1930 | 30 |
| 1931 | 44 |
| 1932 | 28 |
| 1933 | 21 |
| 1945 | 1 |
| 1946 | 23 |
| 1947 | 28 |
| 1948 | 23 |
| 1949 | 7 |
| 1950 | 44 |
| 1951 | 32 |
| 1952 | 32 |
| 1953 | 28 |
| 1954 | 16 |
| 1955 | 24 |
| 1956 | 21 |
| 1957 | 10 |
| 1958 | 19 |
| 1959 | 25 |
| 1960 | 11 |
| 1961 | 12 |
| 1962 | 28 |
| 1963 | 26 |
| 1964 | 29 |
| 1965 | 19 |
| 1966 | 23 |
| 1967 | 29 |
| 1968 | 17 |
| 1969 | 23 |
| 1970 | 25 |
| 1971 | 10 |
| 1972 | 13 |
| 2024 | 11 |
| 2025 | 37 |
| 2026 | 17 |
All-Time Record Progression
1 new records| Date | Kind | Detail |
|---|---|---|
| 1949-05-29 | Record daily precipitation | Record daily precipitation 190.5 mm (7.5 in) |
Wettest Day of Each Month
May: 190.5 mm (7.5 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 31.0 mm (1.2 in) | 13 January 1943 |
| Feb | 31.8 mm (1.3 in) | 25 February 1930 |
| Mar | 38.1 mm (1.5 in) | 20 March 1967 |
| Apr | 69.9 mm (2.8 in) | 17 April 1967 |
| May | 190.5 mm (7.5 in) | 29 May 1949 |
| Jun | 67.3 mm (2.6 in) | 9 June 1920 |
| Jul | 109.0 mm (4.3 in) | 2 July 1919 |
| Aug | 74.9 mm (2.9 in) | 3 August 1919 |
| Sep | 67.3 mm (2.6 in) | 26 September 1964 |
| Oct | 80.0 mm (3.1 in) | 1 October 1971 |
| Nov | 31.8 mm (1.3 in) | 27 November 1905 |
| Dec | 19.3 mm (0.8 in) | 25 December 1940 |
Period of Record Coverage
1903 to 2026| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1903 | 167 | 46% | No |
| 1905 | 148 | 41% | No |
| 1906 | 84 | 23% | No |
| 1911 | 41 | 11% | No |
| 1912 | 361 | 99% | Yes |
| 1913 | 329 | 90% | Yes |
| 1914 | 281 | 77% | No |
| 1915 | 357 | 98% | Yes |
| 1916 | 352 | 96% | Yes |
| 1917 | 364 | 100% | Yes |
| 1918 | 361 | 99% | Yes |
| 1919 | 362 | 99% | Yes |
| 1920 | 365 | 100% | Yes |
| 1921 | 361 | 99% | Yes |
| 1922 | 361 | 99% | Yes |
| 1923 | 365 | 100% | Yes |
| 1924 | 363 | 99% | Yes |
| 1925 | 364 | 100% | Yes |
| 1926 | 364 | 100% | Yes |
| 1927 | 358 | 98% | Yes |
| 1928 | 365 | 100% | Yes |
| 1929 | 361 | 99% | Yes |
| 1930 | 362 | 99% | Yes |
| 1931 | 365 | 100% | Yes |
| 1932 | 361 | 99% | Yes |
| 1933 | 267 | 73% | No |
| 1945 | 29 | 8% | No |
| 1946 | 350 | 96% | Yes |
| 1947 | 320 | 88% | No |
| 1948 | 363 | 99% | Yes |
| 1949 | 359 | 98% | Yes |
| 1950 | 354 | 97% | Yes |
| 1951 | 358 | 98% | Yes |
| 1952 | 357 | 98% | Yes |
| 1953 | 354 | 97% | Yes |
| 1954 | 348 | 95% | Yes |
| 1955 | 338 | 93% | Yes |
| 1956 | 342 | 93% | Yes |
| 1957 | 353 | 97% | Yes |
| 1958 | 332 | 91% | Yes |
| 1959 | 362 | 99% | Yes |
| 1960 | 363 | 99% | Yes |
| 1961 | 365 | 100% | Yes |
| 1962 | 364 | 100% | Yes |
| 1963 | 365 | 100% | Yes |
| 1964 | 366 | 100% | Yes |
| 1965 | 364 | 100% | Yes |
| 1966 | 362 | 99% | Yes |
| 1967 | 364 | 100% | Yes |
| 1968 | 364 | 99% | Yes |
| 1969 | 364 | 100% | Yes |
| 1970 | 363 | 99% | Yes |
| 1971 | 362 | 99% | Yes |
| 1972 | 303 | 83% | No |
| 2024 | 198 | 54% | No |
| 2025 | 334 | 92% | Yes |
| 2026 | 280 | 77% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 26 September 2026 | Thief River Falls, US | daily high min (Provisional) | 15.0 C (59.0 F) | 0.6 C (1.1 F) | 105 years | 41 of 100 (Notable) |
| 25 September 2026 | Thief River Falls, US | daily high min (Tie, Provisional) | 15.0 C (59.0 F) | tie | 103 years | 10 of 100 (Routine) |
| 8 September 2026 | Thief River Falls, US | daily high min (Provisional) | 17.2 C (63.0 F) | 1.1 C (2.0 F) | 99 years | 41 of 100 (Notable) |
| 31 August 2026 | Thief River Falls, US | daily high min (Tie, Provisional) | 17.2 C (63.0 F) | tie | 96 years | 9 of 100 (Routine) |
| 30 August 2026 | Thief River Falls, US | daily high min (Provisional) | 18.3 C (64.9 F) | 1.1 C (2.0 F) | 93 years | 40 of 100 (Notable) |
| 4 August 2026 | Thief River Falls, US | daily low max | 20.6 C (69.1 F) | 1.1 C (2.0 F) | 96 years | 41 of 100 (Notable) |
| 30 July 2026 | Thief River Falls, US | daily high min | 18.9 C (66.0 F) | 1.1 C (2.0 F) | 107 years | 42 of 100 (Notable) |
| 24 July 2026 | Thief River Falls, US | daily rain | 61.5 mm (2.4 in) | 44.2 mm (1.7 in) | 105 years | 75 of 100 (Major) |
| 14 July 2026 | Thief River Falls, US | daily high min | 21.7 C (71.1 F) | 1.1 C (2.0 F) | 100 years | 42 of 100 (Notable) |
| 13 July 2026 | Thief River Falls, US | daily high min | 23.3 C (73.9 F) | 3.9 C (7.0 F) | 68 years | 40 of 100 (Notable) |
| 13 July 2026 | Thief River Falls, US | daily high max (Tie) | 34.4 C (93.9 F) | tie | 56 years | 6 of 100 (Routine) |
| 12 July 2026 | Thief River Falls, US | daily high min | 23.3 C (73.9 F) | 3.9 C (7.0 F) | 68 years | 40 of 100 (Notable) |
| 6 July 2026 | Thief River Falls, US | daily high min (Tie) | 19.4 C (66.9 F) | tie | 63 years | 7 of 100 (Routine) |
| 13 June 2026 | Thief River Falls, US | daily low max | 13.9 C (57.0 F) | 0.5 C (0.9 F) | 56 years | 28 of 100 (Routine) |
| 8 June 2026 | Thief River Falls, US | daily high min (Tie) | 17.2 C (63.0 F) | tie | 67 years | 7 of 100 (Routine) |
| 29 May 2026 | Thief River Falls, US | daily high max | 32.8 C (91.0 F) | 1.7 C (3.1 F) | 107 years | 42 of 100 (Notable) |
| 29 May 2026 | Thief River Falls, US | daily high min (Tie) | 19.4 C (66.9 F) | tie | 80 years | 8 of 100 (Routine) |
| 25 May 2026 | Thief River Falls, US | daily high max | 31.7 C (89.1 F) | 1.1 C (2.0 F) | 67 years | 31 of 100 (Routine) |
| 19 May 2026 | Thief River Falls, US | daily low max | 7.8 C (46.0 F) | 2.8 C (5.0 F) | 76 years | 37 of 100 (Notable) |
| 18 May 2026 | Thief River Falls, US | daily low max | 9.4 C (48.9 F) | 0.6 C (1.1 F) | 101 years | 40 of 100 (Notable) |
Climate Trend
41 complete years, 1912 to 1971| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1912 | 2.6 C | -0.63 C |
| 1915 | 4.3 C | +1.03 C |
| 1916 | 1.9 C | -1.34 C |
| 1917 | 0.9 C | -2.33 C |
| 1918 | 3.3 C | +0.07 C |
| 1919 | 3.0 C | -0.22 C |
| 1920 | 3.9 C | +0.66 C |
| 1921 | 5.0 C | +1.70 C |
| 1922 | 4.4 C | +1.12 C |
| 1923 | 4.1 C | +0.80 C |
| 1924 | 2.7 C | -0.59 C |
| 1925 | 3.6 C | +0.36 C |
| 1926 | 3.3 C | +0.00 C |
| 1927 | 2.9 C | -0.39 C |
| 1928 | 4.2 C | +0.89 C |
| 1929 | 2.1 C | -1.19 C |
| 1930 | 4.2 C | +0.91 C |
| 1931 | 6.4 C | +3.16 C |
| 1948 | 3.3 C | +0.03 C |
| 1949 | 3.2 C | -0.09 C |
| 1950 | 0.5 C | -2.75 C |
| 1951 | 1.5 C | -1.77 C |
| 1952 | 3.6 C | +0.32 C |
| 1953 | 3.9 C | +0.62 C |
| 1954 | 3.1 C | -0.17 C |
| 1955 | 2.7 C | -0.61 C |
| 1956 | 2.5 C | -0.75 C |
| 1957 | 3.2 C | -0.04 C |
| 1959 | 2.7 C | -0.52 C |
| 1960 | 3.4 C | +0.12 C |
| 1961 | 4.4 C | +1.14 C |
| 1962 | 3.6 C | +0.29 C |
| 1963 | 4.7 C | +1.47 C |
| 1964 | 3.9 C | +0.61 C |
| 1965 | 2.5 C | -0.79 C |
| 1966 | 2.5 C | -0.76 C |
| 1967 | 3.1 C | -0.16 C |
| 1968 | 3.8 C | +0.50 C |
| 1969 | 3.5 C | +0.20 C |
| 1970 | 2.4 C | -0.86 C |
| 1971 | 3.1 C | -0.21 C |
The fitted trend in annual mean temperature here over 1912 to 1971 is -0.04 C (-0.22 to 0.13) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.1 F (-0.4 to 0.2) per decade. The slope is a straight line fitted to 41 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | -0.04 C (-0.22 to 0.13) per decade | -0.1 F (-0.4 to 0.2) per decade | 1912 to 1971 | 41 | Not clearly different from zero |
| Mean daily maximum | -0.1 C (-0.3 to 0.1) per decade | -0.2 F (-0.5 to 0.1) per decade | 1912 to 1971 | 41 | Not clearly different from zero |
| Mean daily minimum | 0.02 C (-0.16 to 0.20) per decade | 0.04 F (-0.29 to 0.36) per decade | 1912 to 1971 | 41 | Not clearly different from zero |
A year is complete when all 12 months have at least 20 days of both daily maximum and daily minimum readings. The annual mean is the mean of the monthly means. The trend describes this one station over this period; it does not say what caused the change.
Extremes by Year
1900 to 2026| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 42.2 C (108.0 F) | 1917 | 34.4 C (93.9 F) | 57 |
| Coldest night (TNn) | -43.9 C (-47.0 F) | 1912 | -37.8 C (-36.0 F) | 57 |
| Wettest day (Rx1day) | 190.5 mm (7.5 in) | 1949 | 47.0 mm (1.9 in) | 65 |
| Wettest five days (Rx5day) | 243.6 mm (9.6 in) | 1949 | 68.1 mm (2.7 in) | 65 |
| Longest dry spell (CDD) | 54 days | 1941 | 27 days | 65 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1900 | n/a |
| 1901 | n/a |
| 1903 | 32.2 C (90.0 F) |
| 1905 | 30.6 C (87.1 F) |
| 1906 | 13.3 C (55.9 F) |
| 1911 | 3.3 C (37.9 F) |
| 1912 | 38.9 C (102.0 F) |
| 1913 | 35.6 C (96.1 F) |
| 1914 | 33.9 C (93.0 F) |
| 1915 | 32.2 C (90.0 F) |
| 1916 | 35.6 C (96.1 F) |
| 1917 | 42.2 C (108.0 F) |
| 1918 | 36.1 C (97.0 F) |
| 1919 | 33.3 C (91.9 F) |
| 1920 | 37.2 C (99.0 F) |
| 1921 | 37.2 C (99.0 F) |
| 1922 | 36.7 C (98.1 F) |
| 1923 | 33.3 C (91.9 F) |
| 1924 | 33.3 C (91.9 F) |
| 1925 | 33.9 C (93.0 F) |
| 1926 | 35.0 C (95.0 F) |
| 1927 | 33.9 C (93.0 F) |
| 1928 | 33.9 C (93.0 F) |
| 1929 | 36.7 C (98.1 F) |
| 1930 | 35.0 C (95.0 F) |
| 1931 | 38.3 C (100.9 F) |
| 1932 | 37.2 C (99.0 F) |
| 1933 | 37.8 C (100.0 F) |
| 1939 | n/a |
| 1940 | n/a |
| 1941 | n/a |
| 1942 | n/a |
| 1943 | n/a |
| 1944 | n/a |
| 1945 | 5.6 C (42.1 F) |
| 1946 | 35.6 C (96.1 F) |
| 1947 | 34.4 C (93.9 F) |
| 1948 | 36.1 C (97.0 F) |
| 1949 | 35.0 C (95.0 F) |
| 1950 | 32.8 C (91.0 F) |
| 1951 | 33.9 C (93.0 F) |
| 1952 | 33.9 C (93.0 F) |
| 1953 | 34.4 C (93.9 F) |
| 1954 | 33.3 C (91.9 F) |
| 1955 | 35.0 C (95.0 F) |
| 1956 | 35.0 C (95.0 F) |
| 1957 | 34.4 C (93.9 F) |
| 1958 | 35.0 C (95.0 F) |
| 1959 | 33.9 C (93.0 F) |
| 1960 | 33.3 C (91.9 F) |
| 1961 | 35.0 C (95.0 F) |
| 1962 | 32.2 C (90.0 F) |
| 1963 | 33.9 C (93.0 F) |
| 1964 | 37.8 C (100.0 F) |
| 1965 | 36.1 C (97.0 F) |
| 1966 | 35.0 C (95.0 F) |
| 1967 | 34.4 C (93.9 F) |
| 1968 | 33.3 C (91.9 F) |
| 1969 | 36.7 C (98.1 F) |
| 1970 | 36.7 C (98.1 F) |
| 1971 | 33.3 C (91.9 F) |
| 1972 | 33.3 C (91.9 F) |
| 2024 | 31.7 C (89.1 F) |
| 2025 | 35.6 C (96.1 F) |
| 2026 | 34.4 C (93.9 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1900 | n/a |
| 1901 | n/a |
| 1903 | -38.9 C (-38.0 F) |
| 1905 | -34.4 C (-29.9 F) |
| 1906 | -40.6 C (-41.1 F) |
| 1911 | -32.2 C (-26.0 F) |
| 1912 | -43.9 C (-47.0 F) |
| 1913 | -40.0 C (-40.0 F) |
| 1914 | -42.8 C (-45.0 F) |
| 1915 | -39.4 C (-38.9 F) |
| 1916 | -42.8 C (-45.0 F) |
| 1917 | -38.9 C (-38.0 F) |
| 1918 | -37.8 C (-36.0 F) |
| 1919 | -39.4 C (-38.9 F) |
| 1920 | -37.2 C (-35.0 F) |
| 1921 | -34.4 C (-29.9 F) |
| 1922 | -40.0 C (-40.0 F) |
| 1923 | -38.9 C (-38.0 F) |
| 1924 | -37.8 C (-36.0 F) |
| 1925 | -36.1 C (-33.0 F) |
| 1926 | -35.6 C (-32.1 F) |
| 1927 | -39.4 C (-38.9 F) |
| 1928 | -33.9 C (-29.0 F) |
| 1929 | -38.9 C (-38.0 F) |
| 1930 | -40.6 C (-41.1 F) |
| 1931 | -30.6 C (-23.1 F) |
| 1932 | -33.9 C (-29.0 F) |
| 1933 | -40.6 C (-41.1 F) |
| 1939 | n/a |
| 1940 | n/a |
| 1941 | n/a |
| 1942 | n/a |
| 1943 | n/a |
| 1944 | n/a |
| 1945 | -17.8 C (0.0 F) |
| 1946 | -36.1 C (-33.0 F) |
| 1947 | -32.8 C (-27.0 F) |
| 1948 | -37.8 C (-36.0 F) |
| 1949 | -35.0 C (-31.0 F) |
| 1950 | -37.8 C (-36.0 F) |
| 1951 | -38.3 C (-36.9 F) |
| 1952 | -36.7 C (-34.1 F) |
| 1953 | -32.2 C (-26.0 F) |
| 1954 | -41.7 C (-43.1 F) |
| 1955 | -38.3 C (-36.9 F) |
| 1956 | -35.6 C (-32.1 F) |
| 1957 | -36.1 C (-33.0 F) |
| 1958 | -33.3 C (-27.9 F) |
| 1959 | -39.4 C (-38.9 F) |
| 1960 | -32.2 C (-26.0 F) |
| 1961 | -35.6 C (-32.1 F) |
| 1962 | -38.3 C (-36.9 F) |
| 1963 | -36.1 C (-33.0 F) |
| 1964 | -33.3 C (-27.9 F) |
| 1965 | -38.9 C (-38.0 F) |
| 1966 | -40.6 C (-41.1 F) |
| 1967 | -40.0 C (-40.0 F) |
| 1968 | -40.0 C (-40.0 F) |
| 1969 | -35.6 C (-32.1 F) |
| 1970 | -42.2 C (-44.0 F) |
| 1971 | -37.8 C (-36.0 F) |
| 1972 | -39.4 C (-38.9 F) |
| 2024 | -27.2 C (-17.0 F) |
| 2025 | -32.2 C (-26.0 F) |
| 2026 | -33.9 C (-29.0 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1900 | 53.8 mm (2.1 in) |
| 1901 | 40.4 mm (1.6 in) |
| 1903 | 39.4 mm (1.6 in) |
| 1905 | 31.8 mm (1.3 in) |
| 1906 | 7.6 mm (0.30 in) |
| 1911 | 5.3 mm (0.21 in) |
| 1912 | 50.8 mm (2.0 in) |
| 1913 | 41.9 mm (1.6 in) |
| 1914 | 35.6 mm (1.4 in) |
| 1915 | 59.7 mm (2.4 in) |
| 1916 | 49.3 mm (1.9 in) |
| 1917 | 21.8 mm (0.9 in) |
| 1918 | 24.6 mm (1.0 in) |
| 1919 | 109.0 mm (4.3 in) |
| 1920 | 67.3 mm (2.6 in) |
| 1921 | 33.0 mm (1.3 in) |
| 1922 | 64.5 mm (2.5 in) |
| 1923 | 38.4 mm (1.5 in) |
| 1924 | 36.1 mm (1.4 in) |
| 1925 | 53.6 mm (2.1 in) |
| 1926 | 45.2 mm (1.8 in) |
| 1927 | 36.3 mm (1.4 in) |
| 1928 | 61.5 mm (2.4 in) |
| 1929 | 34.8 mm (1.4 in) |
| 1930 | 59.9 mm (2.4 in) |
| 1931 | 31.2 mm (1.2 in) |
| 1932 | 35.6 mm (1.4 in) |
| 1933 | 35.6 mm (1.4 in) |
| 1939 | 36.6 mm (1.4 in) |
| 1940 | 49.5 mm (1.9 in) |
| 1941 | 57.2 mm (2.3 in) |
| 1942 | 47.2 mm (1.9 in) |
| 1943 | 36.1 mm (1.4 in) |
| 1944 | 65.5 mm (2.6 in) |
| 1945 | 66.0 mm (2.6 in) |
| 1946 | 24.1 mm (0.9 in) |
| 1947 | 53.3 mm (2.1 in) |
| 1948 | 29.5 mm (1.2 in) |
| 1949 | 190.5 mm (7.5 in) |
| 1950 | 47.0 mm (1.9 in) |
| 1951 | 55.4 mm (2.2 in) |
| 1952 | 27.2 mm (1.1 in) |
| 1953 | 63.5 mm (2.5 in) |
| 1954 | 48.3 mm (1.9 in) |
| 1955 | 33.3 mm (1.3 in) |
| 1956 | 70.6 mm (2.8 in) |
| 1957 | 54.9 mm (2.2 in) |
| 1958 | 58.2 mm (2.3 in) |
| 1959 | 38.9 mm (1.5 in) |
| 1960 | 50.3 mm (2.0 in) |
| 1961 | 42.4 mm (1.7 in) |
| 1962 | 54.6 mm (2.1 in) |
| 1963 | 27.9 mm (1.1 in) |
| 1964 | 67.3 mm (2.6 in) |
| 1965 | 91.4 mm (3.6 in) |
| 1966 | 46.5 mm (1.8 in) |
| 1967 | 69.9 mm (2.8 in) |
| 1968 | 71.1 mm (2.8 in) |
| 1969 | 44.5 mm (1.8 in) |
| 1970 | 55.9 mm (2.2 in) |
| 1971 | 80.0 mm (3.1 in) |
| 1972 | 35.3 mm (1.4 in) |
| 2024 | 43.4 mm (1.7 in) |
| 2025 | 19.8 mm (0.8 in) |
| 2026 | 61.5 mm (2.4 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1900 | 132.0 mm (5.2 in) |
| 1901 | 68.1 mm (2.7 in) |
| 1903 | 61.8 mm (2.4 in) |
| 1905 | 76.3 mm (3.0 in) |
| 1906 | 7.6 mm (0.30 in) |
| 1911 | 10.2 mm (0.4 in) |
| 1912 | 78.2 mm (3.1 in) |
| 1913 | 45.7 mm (1.8 in) |
| 1914 | 62.5 mm (2.5 in) |
| 1915 | 74.2 mm (2.9 in) |
| 1916 | 75.9 mm (3.0 in) |
| 1917 | 28.4 mm (1.1 in) |
| 1918 | 45.7 mm (1.8 in) |
| 1919 | 135.4 mm (5.3 in) |
| 1920 | 72.1 mm (2.8 in) |
| 1921 | 51.8 mm (2.0 in) |
| 1922 | 64.6 mm (2.5 in) |
| 1923 | 82.9 mm (3.3 in) |
| 1924 | 57.2 mm (2.3 in) |
| 1925 | 105.1 mm (4.1 in) |
| 1926 | 75.1 mm (3.0 in) |
| 1927 | 50.0 mm (2.0 in) |
| 1928 | 122.0 mm (4.8 in) |
| 1929 | 50.0 mm (2.0 in) |
| 1930 | 77.0 mm (3.0 in) |
| 1931 | 42.9 mm (1.7 in) |
| 1932 | 51.3 mm (2.0 in) |
| 1933 | 43.2 mm (1.7 in) |
| 1939 | 48.3 mm (1.9 in) |
| 1940 | 58.1 mm (2.3 in) |
| 1941 | 36.0 mm (1.4 in) |
| 1942 | 89.8 mm (3.5 in) |
| 1943 | 25.6 mm (1.0 in) |
| 1944 | 111.2 mm (4.4 in) |
| 1945 | 67.0 mm (2.6 in) |
| 1946 | 59.7 mm (2.4 in) |
| 1947 | 83.9 mm (3.3 in) |
| 1948 | 70.2 mm (2.8 in) |
| 1949 | 243.6 mm (9.6 in) |
| 1950 | 60.2 mm (2.4 in) |
| 1951 | 81.4 mm (3.2 in) |
| 1952 | 46.2 mm (1.8 in) |
| 1953 | 90.7 mm (3.6 in) |
| 1954 | 52.9 mm (2.1 in) |
| 1955 | 53.1 mm (2.1 in) |
| 1956 | 129.5 mm (5.1 in) |
| 1957 | 70.4 mm (2.8 in) |
| 1958 | 123.8 mm (4.9 in) |
| 1959 | 53.7 mm (2.1 in) |
| 1960 | 93.7 mm (3.7 in) |
| 1961 | 73.4 mm (2.9 in) |
| 1962 | 90.9 mm (3.6 in) |
| 1963 | 69.9 mm (2.8 in) |
| 1964 | 113.3 mm (4.5 in) |
| 1965 | 99.0 mm (3.9 in) |
| 1966 | 60.9 mm (2.4 in) |
| 1967 | 119.4 mm (4.7 in) |
| 1968 | 123.7 mm (4.9 in) |
| 1969 | 50.8 mm (2.0 in) |
| 1970 | 102.1 mm (4.0 in) |
| 1971 | 99.3 mm (3.9 in) |
| 1972 | 45.7 mm (1.8 in) |
| 2024 | 59.4 mm (2.3 in) |
| 2025 | 25.7 mm (1.0 in) |
| 2026 | 62.3 mm (2.5 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1900 | 22 days |
| 1901 | 38 days |
| 1903 | 26 days |
| 1905 | 33 days |
| 1906 | 30 days |
| 1911 | 13 days |
| 1912 | 25 days |
| 1913 | 31 days |
| 1914 | 23 days |
| 1915 | 32 days |
| 1916 | 27 days |
| 1917 | 33 days |
| 1918 | 29 days |
| 1919 | 18 days |
| 1920 | 22 days |
| 1921 | 18 days |
| 1922 | 23 days |
| 1923 | 26 days |
| 1924 | 24 days |
| 1925 | 28 days |
| 1926 | 38 days |
| 1927 | 19 days |
| 1928 | 26 days |
| 1929 | 18 days |
| 1930 | 27 days |
| 1931 | 42 days |
| 1932 | 19 days |
| 1933 | 18 days |
| 1939 | 31 days |
| 1940 | 46 days |
| 1941 | 54 days |
| 1942 | 27 days |
| 1943 | 23 days |
| 1944 | 30 days |
| 1945 | 25 days |
| 1946 | 27 days |
| 1947 | 11 days |
| 1948 | 38 days |
| 1949 | 18 days |
| 1950 | 41 days |
| 1951 | 13 days |
| 1952 | 34 days |
| 1953 | 25 days |
| 1954 | 29 days |
| 1955 | 20 days |
| 1956 | 31 days |
| 1957 | 38 days |
| 1958 | 15 days |
| 1959 | 20 days |
| 1960 | 22 days |
| 1961 | 28 days |
| 1962 | 44 days |
| 1963 | 32 days |
| 1964 | 28 days |
| 1965 | 23 days |
| 1966 | 28 days |
| 1967 | 27 days |
| 1968 | 29 days |
| 1969 | 43 days |
| 1970 | 26 days |
| 1971 | 28 days |
| 1972 | 23 days |
| 2024 | 25 days |
| 2025 | 44 days |
| 2026 | 47 days |
Each chart shows one value per year; the dot marks the record year. TXx is the hottest daily maximum, TNn the coldest daily minimum, Rx1day and Rx5day the largest one-day and five-day rain totals, and CDD the longest run of days with less than 1 mm of rain. A year with missing days can understate an extreme.
Frost Dates and Growing Season
41 years with a frostAcross 41 years with a frost, the median last spring frost at Thief River Falls falls on 23 May and the median first autumn frost on 21 September, which leaves a median of 119 days between them.
Fitted over all years, the growing season changes by +2.7 days per decade at this station.
| Measure | Median, all years | Earliest period | Recent period (1925 to 1971) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 23 May | n/a | 24 May | n/a | -1.0 days per decade |
| First autumn frost | 21 September | n/a | 22 September | n/a | +1.7 days per decade |
| Growing days | 119 days | n/a | 121 days | n/a | +2.7 days per decade |
A frost day is a day with a daily minimum at or below 0 C (32 F). The last spring frost and the first autumn frost are the last and first such days of the cold season, and growing days are the days between them. A negative trend for the last spring frost means it comes earlier.
Rainfall Return Levels
36 years, 1915 to 1971A day with at least 47.6 mm (1.9 in) of rain is expected about once in 2 years. A day with at least 164.5 mm (6.5 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 47.6 mm (1.9 in) | |
| 5 years | 70.2 mm (2.8 in) | |
| 10 years | 88.2 mm (3.5 in) | |
| 25 years | 114.9 mm (4.5 in) | |
| 50 years | 138.2 mm (5.4 in) | Longer than the 36 years of record |
| 100 years | 164.5 mm (6.5 in) | Longer than the 36 years of record |
The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 36 years of values from 1915 to 1971.
A return level is an estimate. It is least reliable for the long periods, 50 and 100 years, and for any period longer than the record behind the fit, where the fit has to reach past the largest day actually observed. It is not a forecast.
The largest wettest-day totals in the fit: 190.5 mm (7.5 in) in 1949; 109.0 mm (4.3 in) in 1919; 91.4 mm (3.6 in) in 1965.
Station Changes
1 suspectedOne change was suspected in the annual mean temperature of Thief River Falls, at 1925. Each is measured against neighbouring stations.
- Relative to 5 neighbouring stations, the station's annual mean temperature from 1925 ran 0.4 C (0.8 F) lower than in the years before (likely change).
| Year | Shift (C) | Shift (F) | Strength | Neighbours |
|---|---|---|---|---|
| 1925 | -0.4 | -0.8 | likely | 5 |
Possible change at the station (a move, a new instrument or a new site); the record is kept as measured. A "likely" change has a larger test statistic than a "possible" one. Neither says why the station differs from its neighbours. How changes are found, and the largest ones.
Download the Data
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 2026-10-13 (13 October 2026). Records are computed by this site and are not official.
Data as of . Last revised (2026-10-13).