Climate averages 1991–2020
Arlington Heights weather
in July.
A warm, 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 Arlington Heights: daytime highs average 27.4°C and nights cool to about 19.5°C. By daytime temperature it is the warmest month of the year.
Expect about 90 mm of rain on roughly 11 days, which makes July a 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 Schaumburg (10 km away). In July its highs average 27.7°C, about as warm as Arlington Heights, with 90 mm of rain.
Among the 498 cities listed in the United States, Arlington Heights ranks joint 399th of 498 for the warmest July highs and joint 309th of 498 for the driest July (rainfall, lowest first). The mean July high of those 498 cities is 30.3°C; Arlington Heights is 2.9°C cooler than that mean.
From July to August, average highs fall by 1.0°C to 26.4°C, and monthly rainfall rises from 90 mm to 93 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
Arlington Heights climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | -1.1°C-8.3°C | -8.3°C | 53 | 8.1 | 9.59 h |
| February | 0.9°C-7.1°C | -7.1°C | 49 | 7.0 | 10.511 h |
| March | 6.6°C-1.8°C | -1.8°C | 64 | 9.7 | 11.912 h |
| April | 13.0°C4.0°C | 4.0°C | 110 | 12.3 | 13.313 h |
| May | 19.2°C10.4°C | 10.4°C | 110 | 12.5 | 14.515 h |
| June | 24.9°C16.6°C | 16.6°C | 99 | 12.0 | 15.215 h |
| July, selected | 27.4°C19.5°C | 19.5°C | 90 | 11.3 | 14.915 h |
| August | 26.4°C19.0°C | 19.0°C | 93 | 10.5 | 13.914 h |
| September | 22.7°C15.1°C | 15.1°C | 75 | 8.5 | 12.513 h |
| October | 15.8°C8.6°C | 8.6°C | 79 | 9.1 | 11.111 h |
| November | 8.1°C1.7°C | 1.7°C | 61 | 8.1 | 9.910 h |
| December | 1.8°C-4.4°C | -4.4°C | 54 | 8.2 | 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
- Schaumburg in JulyUnited States · 10 kmHigh 27.7°C · Low 18.8°C · 90 mm rain
- Evanston in JulyUnited States · 25 kmHigh 26.7°C · Low 20.7°C · 86 mm rain
- Elgin in JulyUnited States · 25 kmHigh 27.8°C · Low 18.9°C · 94 mm rain
- Waukegan in JulyUnited States · 33 kmHigh 25.3°C · Low 21.2°C · 78 mm rain
- Cicero in JulyUnited States · 33 kmHigh 27.8°C · Low 19.6°C · 92 mm rain
- Naperville in JulyUnited States · 36 kmHigh 27.8°C · Low 18.9°C · 94 mm rain
- Chicago in JulyUnited States · 38 kmHigh 27.3°C · Low 20.2°C · 92 mm rain
- Bolingbrook in JulyUnited States · 44 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 Arlington Heights) is explained once on the Arlington Heights year overview and on the Sources, method and limits page.
Schaumburg lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.