Weather in Waukegan, Illinois, United States
Historical monthly conditions · 2021–2025
Monthly averages
Average daily air-temperature lows/highs and peak wind gusts. Rain is the average monthly total.
| Month | Avg low | Avg high | Rain | Cloud cover | Avg peak gust |
|---|---|---|---|---|---|
| January | -4°C | 0°C | 73.5 mm | 78% | 46.3 km/h |
| February | -4°C | 1°C | 55.0 mm | 65% | 47.0 km/h |
| March | 1°C | 5°C | 103.9 mm | 64% | 45.7 km/h |
| April | 4°C | 9°C | 93.9 mm | 62% | 41.4 km/h |
| May | 9°C | 13°C | 86.1 mm | 61% | 35.9 km/h |
| June | 16°C | 20°C | 85.0 mm | 51% | 33.9 km/h |
| July | 19°C | 23°C | 80.4 mm | 50% | 30.6 km/h |
| August | 20°C | 24°C | 62.3 mm | 47% | 32.6 km/h |
| September | 18°C | 21°C | 56.6 mm | 43% | 34.7 km/h |
| October | 12°C | 16°C | 102.4 mm | 49% | 43.1 km/h |
| November | 5°C | 9°C | 70.4 mm | 61% | 47.6 km/h |
| December | -1°C | 3°C | 88.8 mm | 77% | 48.0 km/h |
Weather match by month
Feels like 15°C–30°C · cloud ≤60% · rain ≤0.1 mm/h · gust ≤50 km/h
Feels-like temperature accounts for humidity and wind in shade. Percentages cover 08:00–20:00 local solar time.
| Month | Match rate | |
|---|---|---|
| January | 0.0% | |
| February | 0.0% | |
| March | <0.1% | |
| April | 0.1% | |
| May | 2.8% | |
| June | 31.0% | |
| July | 50.8% | |
| August | 53.9% | |
| September | 50.2% | |
| October | 11.3% | |
| November | <0.1% | |
| December | 0.0% |
About this location and data
- Urban-centre population
- 112,414
- Elevation
- 189 m
- Coordinates
- 42.36°N, 87.85°W
- Urban area
- 51 km²
Weather averages use 4 ERA5 grid cells, weighted by the area of the urban centre in each cell.
2021-2025 recent-weather sample (not a 30-year normal).
How the weather scores are calculatedNearby places with higher scores
Annual results for the default weather criteria: