South Holland, IL Weather & Climate Normals
What a normal year in South Holland actually looks like
On the 30-year record NOAA keeps for South Holland, 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 South Holland's weather actually swings
Average temperatures in South Holland run from 23°F in Jan up to 74°F in Jul, a 50.7°F seasonal swing, one of the widest gaps in this dataset.
South Holland, month by month
| Month | Avg high | Avg low | Precip | Snow |
|---|---|---|---|---|
| Jan | 31°F | 15°F | 2.49in | 10.2in |
| Feb | 35°F | 18°F | 2.15in | 7.5in |
| Mar | 46°F | 28°F | 2.65in | 4.9in |
| Apr | 59°F | 38°F | 4.02in | 0.5in |
| May | 71°F | 49°F | 4.57in | 0in |
| Jun | 80°F | 59°F | 4.91in | 0in |
| Jul | 84°F | 64°F | 4.73in | 0in |
| Aug | 82°F | 62°F | 4.02in | 0in |
| Sep | 76°F | 55°F | 3.44in | 0in |
| Oct | 63°F | 42°F | 3.65in | 0.2in |
| Nov | 48°F | 31°F | 3in | 0.9in |
| Dec | 36°F | 22°F | 2.47in | 4in |
If you're timing a visit, May, Jun, Jul, Aug, and Sep are South Holland's mildest stretch; if you're moving there, you should plan around Jan's cold instead.
How wet South Holland actually gets
Over a typical year, South Holland sees about 42.1in of precipitation a year across roughly 124 days with measurable rain or snow, with 28.2in of snow a year.
South Holland against the rest of the country
Out of 4876 cities scored here, South Holland comes in at 3341; within IL alone it ranks 130 of 330. Population is about 20,775.
Checking the actual forecast
These figures come from Park Forest, IL US, the NOAA station 8.2 miles from South Holland, 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