LaSalle, IL
Climate overview — based on NOAA 1991-2020 normals from PERU, IL US.
Year-round temperatures (°F)
Climate summary
LaSalle has an annual average temperature of 49.6°F with about 38.1 inches of precipitation per year and 28.5 inches of snow. The warmest month is July (average high 84.0°F), and the coldest is January (average low 14.0°F). June is typically the wettest month (4.62 in) and February the driest (1.77 in). Snow typically falls from October through April.
Best time to visit LaSalle
Full guide →Climate change signal
All-time records →49 of 366 (13.4%) of LaSalle'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.
| 1960s | 29 | |
| 1970s | 66 | |
| 1980s | 58 | |
| 1990s | 58 | |
| 2000s | 66 | |
| 2010s | 62 | |
| 2020s | 27 |
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 | 30.0°F | 14.0°F | 22.0°F | 1.81 in | 8.6 in | 10 |
| February | 34.5°F | 17.6°F | 26.0°F | 1.77 in | 5.5 in | 8 |
| March | 47.5°F | 27.3°F | 37.4°F | 2.28 in | 4.0 in | 11 |
| April | 60.9°F | 37.7°F | 49.3°F | 3.77 in | 0.6 in | 12 |
| May | 72.5°F | 49.2°F | 60.9°F | 4.49 in | — | 13 |
| June | 81.3°F | 59.4°F | 70.3°F | 4.62 in | — | 11 |
| July | 84.0°F | 62.8°F | 73.4°F | 3.89 in | — | 9 |
| August | 82.2°F | 60.8°F | 71.5°F | 3.70 in | — | 10 |
| September | 76.9°F | 52.6°F | 64.8°F | 3.41 in | — | 8 |
| October | 63.9°F | 41.1°F | 52.5°F | 3.50 in | 0.2 in | 10 |
| November | 48.4°F | 30.0°F | 39.2°F | 2.71 in | 0.9 in | 10 |
| December | 35.5°F | 19.9°F | 27.7°F | 2.10 in | 8.7 in | 10 |
Climate twins of LaSalle
Why these? →The most climatically similar US cities at least 140 miles away (by monthly temperature + precipitation pattern).