Lerna, IL
Climate overview — based on NOAA 1991-2020 normals from MATTOON COLES CO AP, IL US.
Year-round temperatures (°F)
Climate summary
Lerna has an annual average temperature of 53.4°F with about 36 inches of precipitation per year. The warmest month is July (average high 85.6°F), and the coldest is January (average low 20.3°F). June is typically the wettest month (4.72 in) and February the driest (1.81 in).
Best time to visit Lerna
Full guide →Climate change signal
All-time records →126 of 366 (34.4%) of Lerna'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.
| 1990s | 32 | |
| 2000s | 113 | |
| 2010s | 149 | |
| 2020s | 72 |
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 | 35.4°F | 20.3°F | 27.8°F | 2.04 in | — | 8 |
| February | 40.3°F | 23.7°F | 32.0°F | 1.81 in | — | 8 |
| March | 52.2°F | 33.0°F | 42.6°F | 2.22 in | — | 9 |
| April | 64.0°F | 43.2°F | 53.6°F | 4.14 in | — | 10 |
| May | 73.9°F | 54.0°F | 63.9°F | 3.86 in | — | 12 |
| June | 82.7°F | 62.8°F | 72.8°F | 4.72 in | — | 10 |
| July | 85.6°F | 65.7°F | 75.7°F | 3.96 in | — | 10 |
| August | 84.2°F | 63.5°F | 73.9°F | 2.42 in | — | 9 |
| September | 78.7°F | 56.1°F | 67.4°F | 2.85 in | — | 8 |
| October | 65.9°F | 45.3°F | 55.6°F | 3.11 in | — | 8 |
| November | 51.3°F | 34.6°F | 42.9°F | 3.03 in | — | 8 |
| December | 40.0°F | 26.0°F | 33.0°F | 1.84 in | — | 8 |
Climate twins of Lerna
Why these? →The most climatically similar US cities at least 140 miles away (by monthly temperature + precipitation pattern).