Pontiac, IL Weather & Climate Normals
What a normal year in Pontiac actually looks like
On the 30-year record NOAA keeps for Pontiac, IL, the comfort score comes out to 45/100, 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 Pontiac's weather actually swings
Average temperatures in Pontiac run from 25°F in Jan up to 75°F in Jul, a 50.2°F seasonal swing, one of the widest gaps in this dataset.
Pontiac, month by month
| Month | Avg high | Avg low | Precip | Snow |
|---|---|---|---|---|
| Jan | 32°F | 17°F | 1.99in | 6.7in |
| Feb | 37°F | 21°F | 1.76in | 8in |
| Mar | 49°F | 30°F | 2.62in | 3.4in |
| Apr | 63°F | 41°F | 3.49in | 0.6in |
| May | 74°F | 52°F | 4.43in | 0in |
| Jun | 82°F | 62°F | 3.9in | 0in |
| Jul | 84°F | 66°F | 3.71in | 0in |
| Aug | 83°F | 64°F | 3.73in | 0in |
| Sep | 78°F | 56°F | 3.39in | 0in |
| Oct | 65°F | 44°F | 3.24in | 0in |
| Nov | 50°F | 33°F | 2.56in | 0.7in |
| Dec | 38°F | 23°F | 2.13in | 5.7in |
If you're timing a visit, May, Jun, Jul, Aug, and Sep are Pontiac's mildest stretch; if you're moving there, you should plan around Jan's cold instead.
How wet Pontiac actually gets
Over a typical year, Pontiac sees about 36.95in of precipitation a year across roughly 112 days with measurable rain or snow, with 25.1in of snow a year.
Pontiac against the rest of the country
Out of 4876 cities scored here, Pontiac comes in at 3453; within IL alone it ranks 143 of 330. Population is about 11,054.
Checking the actual forecast
These figures come from Pontiac, IL US, the NOAA station 0.8 miles from Pontiac, 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