Mendota, IL Weather & Climate Normals
What a normal year in Mendota actually looks like
On the 30-year record NOAA keeps for Mendota, 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 Mendota's weather actually swings
Average temperatures in Mendota run from 20°F in Jan up to 72°F in Jul, a 51.9°F seasonal swing, one of the widest gaps in this dataset.
Mendota, month by month
| Month | Avg high | Avg low | Precip | Snow |
|---|---|---|---|---|
| Jan | 28°F | 12°F | 1.6in | 9.6in |
| Feb | 32°F | 16°F | 1.73in | 6.7in |
| Mar | 45°F | 26°F | 2.19in | 3.6in |
| Apr | 59°F | 36°F | 3.2in | 0.9in |
| May | 70°F | 48°F | 4.83in | 0in |
| Jun | 80°F | 58°F | 4.62in | 0in |
| Jul | 82°F | 62°F | 3.9in | 0in |
| Aug | 80°F | 60°F | 3.74in | 0in |
| Sep | 75°F | 52°F | 3.58in | 0in |
| Oct | 63°F | 40°F | 2.99in | 0.1in |
| Nov | 46°F | 28°F | 2.44in | 1.7in |
| Dec | 33°F | 18°F | 1.93in | 7.5in |
If you're timing a visit, May, Jun, Jul, Aug, and Sep are Mendota's mildest stretch; if you're moving there, you should plan around Jan's cold instead.
How wet Mendota actually gets
Over a typical year, Mendota sees about 36.75in of precipitation a year across roughly 110 days with measurable rain or snow, with 30.1in of snow a year.
Mendota against the rest of the country
Out of 4876 cities scored here, Mendota comes in at 3897; within IL alone it ranks 219 of 330. Population is about 6,922.
Checking the actual forecast
These figures come from Paw Paw 2s, IL US, the NOAA station 9.8 miles from Mendota, 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