Altona, IL
Climate overview — based on NOAA 1991-2020 normals from ALTONA, IL US.
Year-round temperatures (°F)
Climate summary
Altona has an annual average temperature of 49°F with about 39.4 inches of precipitation per year. The warmest month is July (average high 83.4°F), and the coldest is January (average low 13.0°F). May is typically the wettest month (5.21 in) and January the driest (1.82 in).
Best time to visit Altona
Full guide →Climate change signal
All-time records →212 of 366 (57.9%) of Altona'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.
| 2000s | 53 | |
| 2010s | 206 | |
| 2020s | 107 |
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 | 29.9°F | 13.0°F | 21.4°F | 1.82 in | — | — |
| February | 35.3°F | 15.8°F | 25.5°F | 2.07 in | — | — |
| March | 48.1°F | 26.5°F | 37.3°F | 2.58 in | — | — |
| April | 61.5°F | 36.9°F | 49.2°F | 4.00 in | — | — |
| May | 72.0°F | 49.2°F | 60.6°F | 5.21 in | — | — |
| June | 80.5°F | 58.9°F | 69.7°F | 4.72 in | — | — |
| July | 83.4°F | 61.8°F | 72.6°F | 3.98 in | — | — |
| August | 81.9°F | 59.3°F | 70.6°F | 3.76 in | — | — |
| September | 76.3°F | 51.6°F | 64.0°F | 3.81 in | — | — |
| October | 63.9°F | 39.8°F | 51.9°F | 2.77 in | — | — |
| November | 48.5°F | 28.1°F | 38.3°F | 2.56 in | — | — |
| December | 35.4°F | 18.7°F | 27.1°F | 2.10 in | — | — |
Climate twins of Altona
Why these? →The most climatically similar US cities at least 140 miles away (by monthly temperature + precipitation pattern).