Freeport, IL
Climate overview — based on NOAA 1991-2020 normals from FREEPORT WASTE WTP, IL US.
Year-round temperatures (°F)
Climate summary
Freeport has an annual average temperature of 47.7°F with about 38.4 inches of precipitation per year and 34.5 inches of snow. The warmest month is July (average high 82.4°F), and the coldest is January (average low 11.3°F). June is typically the wettest month (5.26 in) and January the driest (1.58 in). Snow typically falls from October through April.
Best time to visit Freeport
Full guide →Climate change signal
All-time records →70 of 366 (19.1%) of Freeport'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.
| 1940s | 0 | |
| 1950s | 0 | |
| 1960s | 0 | |
| 1970s | 48 | |
| 1980s | 94 | |
| 1990s | 54 | |
| 2000s | 52 | |
| 2010s | 72 | |
| 2020s | 46 |
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 | 27.9°F | 11.3°F | 19.6°F | 1.58 in | 9.7 in | 9 |
| February | 32.6°F | 14.8°F | 23.7°F | 1.65 in | 8.5 in | 8 |
| March | 44.9°F | 25.8°F | 35.4°F | 2.15 in | 3.8 in | 9 |
| April | 58.2°F | 36.4°F | 47.3°F | 3.66 in | 0.8 in | 11 |
| May | 69.9°F | 48.4°F | 59.1°F | 4.36 in | — | 13 |
| June | 79.3°F | 58.6°F | 69.0°F | 5.26 in | — | 12 |
| July | 82.4°F | 62.3°F | 72.4°F | 4.21 in | — | 10 |
| August | 80.7°F | 59.9°F | 70.3°F | 4.21 in | — | 10 |
| September | 74.3°F | 51.0°F | 62.6°F | 4.11 in | — | 9 |
| October | 61.5°F | 39.3°F | 50.4°F | 2.98 in | 0.2 in | 9 |
| November | 46.0°F | 28.2°F | 37.1°F | 2.36 in | 2.6 in | 8 |
| December | 33.3°F | 17.9°F | 25.6°F | 1.83 in | 8.9 in | 9 |
Climate twins of Freeport
Why these? →The most climatically similar US cities at least 140 miles away (by monthly temperature + precipitation pattern).