Naperville, IL
Climate overview — based on NOAA 1991-2020 normals from WHEATON 3 SE, IL US.
Year-round temperatures (°F)
Climate summary
Naperville has an annual average temperature of 51.1°F with about 39.9 inches of precipitation per year and 24.3 inches of snow. The warmest month is July (average high 85.5°F), and the coldest is January (average low 16.8°F). June is typically the wettest month (4.65 in) and February the driest (1.96 in). Snow typically falls from November through April.
Best time to visit Naperville
Full guide →Climate change signal
All-time records →0 of 366 (0%) of Naperville'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 | 8 | |
| 1900s | 0 | |
| 1930s | 28 | |
| 1940s | 50 | |
| 1950s | 41 | |
| 1960s | 23 | |
| 1970s | 39 | |
| 1980s | 68 | |
| 1990s | 69 | |
| 2000s | 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 | 32.8°F | 16.8°F | 24.8°F | 2.12 in | 9.3 in | 11 |
| February | 37.5°F | 19.8°F | 28.6°F | 1.96 in | 5.1 in | 8 |
| March | 49.5°F | 28.5°F | 39.0°F | 2.46 in | 4.5 in | 9 |
| April | 62.5°F | 38.3°F | 50.4°F | 4.10 in | 0.3 in | 12 |
| May | 73.6°F | 48.7°F | 61.1°F | 4.46 in | — | 12 |
| June | 82.9°F | 58.5°F | 70.7°F | 4.65 in | — | 10 |
| July | 85.5°F | 63.1°F | 74.3°F | 3.86 in | — | 9 |
| August | 83.7°F | 62.1°F | 72.9°F | 4.40 in | — | 9 |
| September | 78.0°F | 53.8°F | 65.9°F | 3.30 in | — | 8 |
| October | 65.2°F | 42.9°F | 54.0°F | 3.56 in | — | 9 |
| November | 50.1°F | 31.8°F | 41.0°F | 2.81 in | 0.9 in | 10 |
| December | 37.7°F | 22.6°F | 30.2°F | 2.22 in | 4.2 in | 9 |
Climate twins of Naperville
Why these? →The most climatically similar US cities at least 140 miles away (by monthly temperature + precipitation pattern).