Oak Lawn, IL Weather & Climate Normals
What a normal year in Oak Lawn actually looks like
On the 30-year record NOAA keeps for Oak Lawn, 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 Oak Lawn's weather actually swings
Average temperatures in Oak Lawn run from 26°F in Jan up to 77°F in Jul, a 50.5°F seasonal swing, one of the widest gaps in this dataset.
Oak Lawn, month by month
| Month | Avg high | Avg low | Precip | Snow |
|---|---|---|---|---|
| Jan | 33°F | 20°F | 2.3in | 12.5in |
| Feb | 37°F | 23°F | 2.12in | 10.1in |
| Mar | 48°F | 32°F | 2.66in | 5.7in |
| Apr | 60°F | 42°F | 4.15in | 1in |
| May | 72°F | 52°F | 4.75in | 0in |
| Jun | 81°F | 63°F | 4.53in | 0in |
| Jul | 85°F | 68°F | 4.02in | 0in |
| Aug | 83°F | 67°F | 4.1in | 0in |
| Sep | 77°F | 59°F | 3.33in | 0in |
| Oct | 64°F | 47°F | 3.86in | 0.1in |
| Nov | 50°F | 35°F | 2.73in | 1.5in |
| Dec | 38°F | 25°F | 2.33in | 7.9in |
If you're timing a visit, May, Jun, Aug, Sep, and Oct are Oak Lawn's mildest stretch; if you're moving there, you should plan around Jul's heat and Jan's cold instead.
How wet Oak Lawn actually gets
Over a typical year, Oak Lawn sees about 40.88in of precipitation a year across roughly 127 days with measurable rain or snow, with 38.8in of snow a year.
Oak Lawn against the rest of the country
Out of 4876 cities scored here, Oak Lawn comes in at 3963; within IL alone it ranks 231 of 330. Population is about 56,531.
Checking the actual forecast
These figures come from Chicago Midway Ap 3sw, IL US, the NOAA station 2.1 miles from Oak Lawn, averaged over 30 years, not tomorrow's forecast.
More on how this is worked out
Why this uses the nearest NOAA station · How the comfort score is calculated