Waukegan, IL
Climate overview — based on NOAA 1991-2020 normals from WAUKEGAN, IL US.
Year-round temperatures (°F)
Avg high
Avg low
Climate summary
Waukegan has an annual average temperature of 48.4°F with about 0 inches of precipitation per year. The warmest month is July (average high 81.7°F), and the coldest is January (average low 15.6°F).
Pleasant months
3 / 12
avg high 65–80°F, low ≥ 50°F
Annual swing
49.7°F
warmest to coldest month
Best time to visit Waukegan
Full guide →Climate change signal
All-time records →0 of 366 (0%) of Waukegan'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.
| 1920s | 0 | |
| 1930s | 0 | |
| 1940s | 14 | |
| 1950s | 89 | |
| 1960s | 62 | |
| 1970s | 41 | |
| 1980s | 72 | |
| 1990s | 68 | |
| 2000s | 20 |
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 | 29.8°F | 15.6°F | 22.7°F | in | — | — |
| February | 33.7°F | 17.8°F | 25.8°F | in | — | — |
| March | 44.1°F | 27.4°F | 35.8°F | in | — | — |
| April | 55.3°F | 35.3°F | 45.3°F | in | — | — |
| May | 67.4°F | 47.4°F | 57.4°F | in | — | — |
| June | 76.3°F | 56.9°F | 66.6°F | in | — | — |
| July | 81.7°F | 63.0°F | 72.4°F | in | — | — |
| August | 79.9°F | 61.5°F | 70.7°F | in | — | — |
| September | 73.9°F | 53.8°F | 63.8°F | in | — | — |
| October | 61.2°F | 42.9°F | 52.1°F | in | — | — |
| November | 47.7°F | 31.4°F | 39.5°F | in | — | — |
| December | 35.5°F | 21.7°F | 28.6°F | in | — | — |
Last spring / first fall frost
All-time recordsHottest, coldest, wettest
Planting calendarWhat to plant, and when