Thief River Falls, MN
Climate overview — based on NOAA 1991-2020 normals from THIEF RVR FALLS 2, MN US.
Year-round temperatures (°F)
Avg high
Avg low
Climate summary
Thief River Falls has an annual average temperature of 39.9°F with about 0 inches of precipitation per year. The warmest month is July (average high 79.8°F), and the coldest is January (average low -2.9°F).
Pleasant months
3 / 12
avg high 65–80°F, low ≥ 50°F
Annual swing
62.9°F
warmest to coldest month
Best time to visit Thief River Falls
Full guide →Climate change signal
All-time records →17 of 366 (4.6%) of Thief River Falls's all-time daily heat records have been set since 2015. If records were spread evenly across the station's history, only about 5% would fall in any given decade.
| 1970s | 52 | |
| 1980s | 115 | |
| 1990s | 104 | |
| 2000s | 55 | |
| 2010s | 40 |
Bars: number of all-time daily heat records still standing that were set in each decade.
Monthly averages
| Month | Avg High | Avg Low | Avg Temp | Precipitation | Snow | Rainy days |
|---|---|---|---|---|---|---|
| January | 13.5°F | -2.9°F | 5.3°F | in | — | — |
| February | 20.3°F | 1.8°F | 11.0°F | in | — | — |
| March | 34.8°F | 15.8°F | 25.3°F | in | — | — |
| April | 53.3°F | 30.0°F | 41.6°F | in | — | — |
| May | 67.8°F | 42.3°F | 55.0°F | in | — | — |
| June | 76.1°F | 53.1°F | 64.6°F | in | — | — |
| July | 79.8°F | 56.6°F | 68.2°F | in | — | — |
| August | 79.1°F | 55.3°F | 67.2°F | in | — | — |
| September | 69.2°F | 46.7°F | 57.9°F | in | — | — |
| October | 53.0°F | 34.6°F | 43.8°F | in | — | — |
| November | 34.4°F | 19.2°F | 26.8°F | in | — | — |
| December | 20.2°F | 4.6°F | 12.4°F | in | — | — |
Last spring / first fall frost
All-time recordsHottest, coldest, wettest
Planting calendarWhat to plant, and when