Roselle, IL Weather & Climate Normals
What a normal year in Roselle actually looks like
On the 30-year record NOAA keeps for Roselle, IL, the comfort score comes out to 44/100, 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 Roselle's weather actually swings
Average temperatures in Roselle run from 23°F in Jan up to 74°F in Jul, a 51.2°F seasonal swing, one of the widest gaps in this dataset.
Roselle, month by month
| Month | Avg high | Avg low | Precip | Snow |
|---|---|---|---|---|
| Jan | 32°F | 14°F | 1.9in | 11.9in |
| Feb | 37°F | 16°F | 1.7in | 6in |
| Mar | 48°F | 25°F | 2.09in | 4.8in |
| Apr | 61°F | 35°F | 3.64in | 0.7in |
| May | 73°F | 47°F | 4.66in | 0in |
| Jun | 83°F | 57°F | 4.72in | 0in |
| Jul | 87°F | 61°F | 3.34in | 0in |
| Aug | 85°F | 60°F | 4.45in | 0in |
| Sep | 78°F | 51°F | 3.58in | 0in |
| Oct | 65°F | 40°F | 3.51in | 0.1in |
| Nov | 50°F | 29°F | 2.51in | 1.8in |
| Dec | 38°F | 19°F | 1.92in | 8.7in |
If you're timing a visit, May, Jun, Jul, Aug, and Sep are Roselle's mildest stretch; if you're moving there, you should plan around Jan's cold instead.
How wet Roselle actually gets
Over a typical year, Roselle sees about 38.02in of precipitation a year across roughly 129 days with measurable rain or snow, with 34in of snow a year.
Roselle against the rest of the country
Out of 4876 cities scored here, Roselle comes in at 3753; within IL alone it ranks 190 of 330. Population is about 22,871.
Checking the actual forecast
These figures come from Streamwood, IL US, the NOAA station 5.7 miles from Roselle, 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