River Grove, IL Weather & Climate Normals
What a normal year in River Grove actually looks like
On the 30-year record NOAA keeps for River Grove, IL, the comfort score comes out to 38/100, weather-driven: Heat, cold, snow, or rainfall here are heavy enough that they shape daily life for a large part of the year. Only 4 months a year land in the 55–75°F range this site treats as mild.
How much River Grove's weather actually swings
Average temperatures in River Grove run from 25°F in Jan up to 76°F in Jul, a 50.3°F seasonal swing, one of the widest gaps in this dataset.
River Grove, month by month
| Month | Avg high | Avg low | Precip | Snow |
|---|---|---|---|---|
| Jan | 32°F | 19°F | 1.99in | 11.3in |
| Feb | 36°F | 22°F | 1.97in | 10.7in |
| Mar | 47°F | 31°F | 2.45in | 5.5in |
| Apr | 59°F | 40°F | 3.75in | 1.3in |
| May | 71°F | 51°F | 4.49in | 0in |
| Jun | 80°F | 61°F | 4.1in | 0in |
| Jul | 85°F | 66°F | 3.71in | 0in |
| Aug | 83°F | 65°F | 4.25in | 0in |
| Sep | 76°F | 57°F | 3.19in | 0in |
| Oct | 63°F | 45°F | 3.43in | 0.2in |
| Nov | 48°F | 34°F | 2.42in | 1.8in |
| Dec | 37°F | 24°F | 2.11in | 7.6in |
If you're timing a visit, May, Jun, Aug, and Sep are River Grove's mildest stretch; if you're moving there, you should plan around Jul's heat and Jan's cold instead.
How wet River Grove actually gets
Over a typical year, River Grove sees about 37.86in of precipitation a year across roughly 126 days with measurable rain or snow, with 38.4in of snow a year.
River Grove against the rest of the country
Out of 4876 cities scored here, River Grove comes in at 4724; within IL alone it ranks 313 of 330. Population is about 10,424.
Checking the actual forecast
These figures come from Chicago Ohare Intl Ap, IL US, the NOAA station 6.9 miles from River Grove, averaged over 30 years, not tomorrow's forecast.
More on how this is worked out
Why this uses the nearest NOAA station · How the comfort score is calculated