Naplate, IL
Climate overview — based on NOAA 1991-2020 normals from OTTAWA 5SW, IL US.
Year-round temperatures (°F)
Climate summary
Naplate has an annual average temperature of 50.2°F with about 36.2 inches of precipitation per year and 23.7 inches of snow. The warmest month is July (average high 82.9°F), and the coldest is January (average low 15.2°F). May is typically the wettest month (4.48 in) and February the driest (1.54 in). Snow typically falls from November through April.
Best time to visit Naplate
Full guide →Climate change signal
All-time records →19 of 366 (5.2%) of Naplate'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 | 32 | |
| 1900s | 27 | |
| 1910s | 36 | |
| 1920s | 30 | |
| 1930s | 71 | |
| 1940s | 26 | |
| 1950s | 27 | |
| 1960s | 11 | |
| 1970s | 18 | |
| 1980s | 16 | |
| 1990s | 19 | |
| 2000s | 22 | |
| 2010s | 24 | |
| 2020s | 7 |
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 | 30.7°F | 15.2°F | 22.9°F | 1.78 in | 9.2 in | 9 |
| February | 35.1°F | 18.9°F | 27.0°F | 1.54 in | 5.2 in | 8 |
| March | 47.6°F | 29.0°F | 38.3°F | 2.29 in | 3.3 in | 9 |
| April | 61.2°F | 39.4°F | 50.3°F | 3.53 in | 0.4 in | 12 |
| May | 71.7°F | 50.9°F | 61.3°F | 4.48 in | — | 12 |
| June | 79.9°F | 60.5°F | 70.2°F | 4.40 in | — | 11 |
| July | 82.9°F | 64.4°F | 73.7°F | 3.63 in | — | 8 |
| August | 81.6°F | 62.3°F | 71.9°F | 3.72 in | — | 9 |
| September | 76.4°F | 54.2°F | 65.3°F | 3.23 in | — | 8 |
| October | 64.0°F | 42.6°F | 53.3°F | 3.10 in | — | 9 |
| November | 48.5°F | 31.5°F | 40.0°F | 2.50 in | 0.8 in | 9 |
| December | 35.9°F | 21.1°F | 28.5°F | 1.99 in | 4.8 in | 9 |
Climate twins of Naplate
Why these? →The most climatically similar US cities at least 140 miles away (by monthly temperature + precipitation pattern).