Joliet, MT
Climate overview — based on NOAA 1991-2020 normals from JOLIET, MT US.
Year-round temperatures (°F)
Climate summary
Joliet has an annual average temperature of 43.7°F with about 14.5 inches of precipitation per year and 50.9 inches of snow. The warmest month is July (average high 85.7°F), and the coldest is January (average low 9.8°F). May is typically the wettest month (2.67 in) and January the driest (0.53 in). Snow typically falls from September through May.
Best time to visit Joliet
Full guide →Climate change signal
All-time records →24 of 366 (6.6%) of Joliet'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.
| 1950s | 22 | |
| 1960s | 61 | |
| 1970s | 37 | |
| 1980s | 74 | |
| 1990s | 70 | |
| 2000s | 61 | |
| 2010s | 36 | |
| 2020s | 5 |
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 | 35.9°F | 9.8°F | 22.9°F | 0.53 in | 7.7 in | 5 |
| February | 38.6°F | 12.0°F | 25.3°F | 0.57 in | 9.5 in | 5 |
| March | 49.0°F | 19.1°F | 34.1°F | 0.84 in | 8.0 in | 6 |
| April | 56.5°F | 26.6°F | 41.5°F | 1.89 in | 4.1 in | 9 |
| May | 65.7°F | 36.3°F | 51.0°F | 2.67 in | 0.8 in | 11 |
| June | 75.8°F | 44.3°F | 60.1°F | 2.11 in | — | 10 |
| July | 85.7°F | 49.9°F | 67.8°F | 0.94 in | — | 7 |
| August | 84.3°F | 47.9°F | 66.1°F | 0.88 in | — | 6 |
| September | 73.7°F | 39.3°F | 56.5°F | 1.26 in | 0.4 in | 6 |
| October | 58.8°F | 28.6°F | 43.7°F | 1.57 in | 4.8 in | 7 |
| November | 45.3°F | 18.9°F | 32.1°F | 0.70 in | 6.5 in | 5 |
| December | 35.8°F | 11.1°F | 23.4°F | 0.58 in | 9.1 in | 5 |
Climate twins of Joliet
Why these? →The most climatically similar US cities at least 140 miles away (by monthly temperature + precipitation pattern).