New Lenox, IL Weather & Climate Normals
New Lenox's real weather, in one number
New Lenox, IL scores 46/100 on this site's reading of NOAA's own 30-year normals: strongly seasonal. Comfortable weather is limited to a shorter window; summers, winters, or precipitation swing wide. 5 of the year's 12 months average between 55 and 75°F, the range this site counts as mild.
New Lenox's hottest and coldest months
New Lenox's hottest month is Jul, averaging 74°F; its coldest is Jan, averaging 24°F, a 50°F swing across the year, one of the widest gaps in this dataset.
New Lenox's weather across the year
| Month | Avg high | Avg low | Precip | Snow |
|---|---|---|---|---|
| Jan | 31°F | 17°F | 1.99in | 5in |
| Feb | 35°F | 20°F | 1.78in | 6.2in |
| Mar | 47°F | 29°F | 2.27in | 2.1in |
| Apr | 60°F | 39°F | 3.93in | 0.1in |
| May | 71°F | 49°F | 4.53in | 0in |
| Jun | 80°F | 60°F | 4.3in | 0in |
| Jul | 84°F | 64°F | 4.55in | 0in |
| Aug | 82°F | 63°F | 3.97in | 0in |
| Sep | 76°F | 55°F | 3.17in | 0in |
| Oct | 63°F | 43°F | 3.14in | 0in |
| Nov | 49°F | 32°F | 2.46in | 0.3in |
| Dec | 36°F | 22°F | 1.94in | 3.2in |
May, Jun, Jul, Aug, and Sep are the best time to see New Lenox at its mildest; the rest of the year, plan around Jan's cold.
Rain and snow in New Lenox
New Lenox averages 38.03in of precipitation a year across roughly 123 days with measurable rain or snow, and 16.9in of snow a year.
Where New Lenox ranks
New Lenox ranks 2967 of 4876 US cities in this dataset for comfort score, and 97 of 330 within IL. About 28,480 people live there.
If you need tomorrow's forecast, not the 30-year average
Everything above is a 30-year average from Joliet Brandon Rd Dam, IL US, 6.9 miles from New Lenox, not a prediction for any specific day.
More on how this is worked out
How the comfort score is calculated · Why some cities show no snow or rain figure