Martinsville, IL
Climate overview — based on NOAA 1991-2020 normals from CASEY, IL US.
Year-round temperatures (°F)
Climate summary
Martinsville has an annual average temperature of 54.1°F with about 45.5 inches of precipitation per year and 11.9 inches of snow. The warmest month is July (average high 87.7°F), and the coldest is January (average low 19.3°F). June is typically the wettest month (5.16 in) and February the driest (2.60 in). Snow typically falls from November through March.
Best time to visit Martinsville
Full guide →Climate change signal
All-time records →123 of 366 (33.6%) of Martinsville'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 | 82 | |
| 1900s | 90 | |
| 1910s | 15 | |
| 1920s | 0 | |
| 1930s | 0 | |
| 1940s | 0 | |
| 1950s | 0 | |
| 1980s | 48 | |
| 1990s | 6 | |
| 2000s | 0 | |
| 2010s | 53 | |
| 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 | 37.5°F | 19.3°F | 28.4°F | 3.25 in | 5.0 in | 9 |
| February | 42.5°F | 22.2°F | 32.4°F | 2.60 in | 1.9 in | 8 |
| March | 53.2°F | 32.0°F | 42.6°F | 3.34 in | 1.4 in | 10 |
| April | 65.2°F | 42.8°F | 54.0°F | 5.07 in | 0.1 in | 11 |
| May | 75.9°F | 53.9°F | 64.9°F | 4.48 in | — | 12 |
| June | 84.0°F | 62.7°F | 73.4°F | 5.16 in | — | 11 |
| July | 87.7°F | 65.7°F | 76.7°F | 4.64 in | — | 8 |
| August | 86.3°F | 64.0°F | 75.2°F | 3.03 in | — | 7 |
| September | 80.8°F | 55.4°F | 68.1°F | 3.07 in | — | 7 |
| October | 68.7°F | 44.1°F | 56.4°F | 3.81 in | — | 9 |
| November | 54.1°F | 33.4°F | 43.8°F | 4.03 in | 0.3 in | 8 |
| December | 42.1°F | 24.3°F | 33.2°F | 3.06 in | 3.2 in | 9 |
Climate twins of Martinsville
Why these? →The most climatically similar US cities at least 140 miles away (by monthly temperature + precipitation pattern).