Long Grove, IL Weather & Climate Normals
What a normal year in Long Grove actually looks like
On the 30-year record NOAA keeps for Long Grove, IL, the comfort score comes out to 43/100, strongly seasonal: Comfortable weather is limited to a shorter window; summers, winters, or precipitation swing wide. Only 5 months a year land in the 55–75°F range this site treats as mild.
How much Long Grove's weather actually swings
Average temperatures in Long Grove run from 21°F in Jan up to 72°F in Jul, a 51°F seasonal swing, one of the widest gaps in this dataset.
Long Grove, month by month
| Month | Avg high | Avg low | Precip | Snow |
|---|---|---|---|---|
| Jan | 29°F | 14°F | 1.76in | 11in |
| Feb | 33°F | 16°F | 1.93in | 12.8in |
| Mar | 44°F | 26°F | 2.49in | 5.3in |
| Apr | 57°F | 36°F | 3.95in | 1.8in |
| May | 68°F | 47°F | 4.57in | 0in |
| Jun | 78°F | 58°F | 4.38in | 0in |
| Jul | 82°F | 62°F | 4.01in | 0in |
| Aug | 81°F | 61°F | 4.19in | 0in |
| Sep | 74°F | 53°F | 3.38in | 0in |
| Oct | 61°F | 42°F | 3.2in | 0in |
| Nov | 47°F | 30°F | 2.47in | 2.5in |
| Dec | 34°F | 20°F | 2.12in | 9.7in |
If you're timing a visit, May, Jun, Jul, Aug, and Sep are Long Grove's mildest stretch; if you're moving there, you should plan around Jan's cold instead.
How wet Long Grove actually gets
Over a typical year, Long Grove sees about 38.45in of precipitation a year across roughly 128 days with measurable rain or snow, with 43.1in of snow a year.
Long Grove against the rest of the country
Out of 4876 cities scored here, Long Grove comes in at 4086; within IL alone it ranks 272 of 330. Population is about 8,393.
Checking the actual forecast
These figures come from Mundelein 4 Wsw, IL US, the NOAA station 5.4 miles from Long Grove, averaged over 30 years, not tomorrow's forecast.
More on how this is worked out
Why some cities show no snow or rain figure · What a 30-year climate normal actually is