St. Ignatius, MT
Climate overview — based on NOAA 1991-2020 normals from SAINT IGNATIUS, MT US.
Year-round temperatures (°F)
Climate summary
St. Ignatius has an annual average temperature of 47.7°F with about 16.7 inches of precipitation per year. The warmest month is July (average high 86.0°F), and the coldest is February (average low 22.3°F). June is typically the wettest month (2.63 in) and March the driest (0.94 in).
Best time to visit St. Ignatius
Full guide →Climate change signal
All-time records →16 of 366 (4.4%) of St. Ignatius'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.
| 1890s | 10 | |
| 1900s | 4 | |
| 1910s | 37 | |
| 1920s | 21 | |
| 1930s | 52 | |
| 1940s | 17 | |
| 1950s | 31 | |
| 1960s | 40 | |
| 1970s | 28 | |
| 1980s | 37 | |
| 1990s | 36 | |
| 2000s | 35 | |
| 2010s | 2 | |
| 2020s | 16 |
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 | 36.8°F | 22.6°F | 29.7°F | 0.95 in | — | 9 |
| February | 39.9°F | 22.3°F | 31.1°F | 1.15 in | — | 7 |
| March | 50.6°F | 28.0°F | 39.3°F | 0.94 in | — | 8 |
| April | 59.4°F | 33.9°F | 46.7°F | 1.75 in | — | 9 |
| May | 68.6°F | 41.0°F | 54.8°F | 2.30 in | — | 11 |
| June | 75.1°F | 46.7°F | 60.9°F | 2.63 in | — | 11 |
| July | 86.0°F | 52.2°F | 69.1°F | 0.97 in | — | 6 |
| August | 85.8°F | 50.7°F | 68.3°F | 1.17 in | — | 6 |
| September | 74.8°F | 44.1°F | 59.4°F | 1.51 in | — | 7 |
| October | 59.3°F | 34.6°F | 47.0°F | 1.28 in | — | 8 |
| November | 44.8°F | 27.5°F | 36.1°F | 1.13 in | — | 10 |
| December | 36.5°F | 22.5°F | 29.5°F | 0.94 in | — | 9 |
Climate twins of St. Ignatius
Why these? →The most climatically similar US cities at least 140 miles away (by monthly temperature + precipitation pattern).