Marengo, IL
Climate overview — based on NOAA 1991-2020 normals from MARENGO, IL US.
Year-round temperatures (°F)
Climate summary
Marengo has an annual average temperature of 48.2°F with about 37.6 inches of precipitation per year and 30.8 inches of snow. The warmest month is July (average high 83.5°F), and the coldest is January (average low 12.7°F). June is typically the wettest month (4.62 in) and February the driest (1.64 in). Snow typically falls from November through April.
Best time to visit Marengo
Full guide →Climate change signal
All-time records →19 of 366 (5.2%) of Marengo'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 | 15 | |
| 1900s | 17 | |
| 1910s | 30 | |
| 1920s | 30 | |
| 1930s | 64 | |
| 1940s | 40 | |
| 1950s | 22 | |
| 1960s | 15 | |
| 1970s | 20 | |
| 1980s | 42 | |
| 1990s | 21 | |
| 2000s | 11 | |
| 2010s | 39 |
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 | 29.2°F | 12.7°F | 20.9°F | 1.67 in | 8.0 in | 7 |
| February | 33.2°F | 15.8°F | 24.5°F | 1.64 in | 9.1 in | 6 |
| March | 44.9°F | 25.9°F | 35.4°F | 2.08 in | 2.4 in | 8 |
| April | 58.6°F | 36.2°F | 47.4°F | 3.81 in | 0.4 in | 11 |
| May | 70.2°F | 47.2°F | 58.7°F | 4.57 in | — | 12 |
| June | 79.9°F | 57.2°F | 68.6°F | 4.62 in | — | 10 |
| July | 83.5°F | 61.7°F | 72.6°F | 4.05 in | — | 9 |
| August | 81.8°F | 59.6°F | 70.7°F | 4.22 in | — | 9 |
| September | 75.4°F | 51.8°F | 63.6°F | 3.68 in | — | 7 |
| October | 62.4°F | 39.9°F | 51.2°F | 2.98 in | — | 8 |
| November | 46.9°F | 29.1°F | 38.0°F | 2.35 in | 1.6 in | 7 |
| December | 34.5°F | 18.5°F | 26.5°F | 1.94 in | 9.3 in | 7 |
Climate twins of Marengo
Why these? →The most climatically similar US cities at least 140 miles away (by monthly temperature + precipitation pattern).