Climate averages 1991–2020
Evanston weather
in July.
A warm, moderately wet month: the warmest and the 8th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
July is a warm month in Evanston: daytime highs average 26.7°C and nights cool to about 20.7°C. By daytime temperature it is the warmest month of the year.
Expect about 86 mm of rain on roughly 11 days, which makes July a moderately wet month (the 8th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 14 h 55 min on an average July day.
The nearest other city in this atlas is Chicago (22 km away). In July its highs average 27.3°C, 0.6°C warmer than Evanston, with 92 mm of rain.
Among the 498 cities listed in the United States, Evanston ranks joint 441st of 498 for the warmest July highs and joint 281st of 498 for the driest July (rainfall, lowest first). The mean July high of those 498 cities is 30.3°C; Evanston is 3.6°C cooler than that mean.
From July to August, average highs fall by 0.9°C to 25.8°C, and monthly rainfall rises from 86 mm to 92 mm.
The annual picture
July in context
Monthly precipitation
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Evanston climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | -1.0°C-7.0°C | -7.0°C | 58 | 9.1 | 9.59 h |
| February | 0.3°C-6.2°C | -6.2°C | 52 | 7.3 | 10.511 h |
| March | 4.8°C-1.5°C | -1.5°C | 66 | 10.0 | 11.912 h |
| April | 10.9°C4.4°C | 4.4°C | 108 | 11.9 | 13.313 h |
| May | 17.7°C11.0°C | 11.0°C | 104 | 12.0 | 14.515 h |
| June | 23.8°C17.5°C | 17.5°C | 92 | 11.8 | 15.215 h |
| July, selected | 26.7°C20.7°C | 20.7°C | 86 | 11.3 | 14.915 h |
| August | 25.8°C20.3°C | 20.3°C | 92 | 10.6 | 13.914 h |
| September | 22.1°C16.4°C | 16.4°C | 74 | 8.9 | 12.513 h |
| October | 15.3°C9.8°C | 9.8°C | 83 | 9.4 | 11.111 h |
| November | 7.9°C2.8°C | 2.8°C | 67 | 8.8 | 9.910 h |
| December | 2.0°C-3.0°C | -3.0°C | 59 | 8.8 | 9.29 h |
Precipitation (rain or snow, as water) is the average of the 30 separate monthly totals. A wet day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
July in nearby cities
- Chicago in JulyUnited States · 22 kmHigh 27.3°C · Low 20.2°C · 92 mm rain
- Cicero in JulyUnited States · 22 kmHigh 27.8°C · Low 19.6°C · 92 mm rain
- Arlington Heights in JulyUnited States · 25 kmHigh 27.4°C · Low 19.5°C · 90 mm rain
- Schaumburg in JulyUnited States · 32 kmHigh 27.7°C · Low 18.8°C · 90 mm rain
- Waukegan in JulyUnited States · 38 kmHigh 25.3°C · Low 21.2°C · 78 mm rain
- Naperville in JulyUnited States · 47 kmHigh 27.8°C · Low 18.9°C · 94 mm rain
- Elgin in JulyUnited States · 49 kmHigh 27.8°C · Low 18.9°C · 94 mm rain
- Bolingbrook in JulyUnited States · 49 kmHigh 27.8°C · Low 18.8°C · 95 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Evanston) is explained once on the Evanston year overview and on the Sources, method and limits page.