Macomb, IL Weather & Climate Normals
Macomb's real weather, in one number
Macomb, IL scores 40/100 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. 4 of the year's 12 months average between 55 and 75°F, the range this site counts as mild.
Macomb's hottest and coldest months
Macomb's hottest month is Jul, averaging 75°F; its coldest is Jan, averaging 24°F, a 50.7°F swing across the year, one of the widest gaps in this dataset.
Macomb's weather across the year
| Month | Avg high | Avg low | Precip | Snow |
|---|---|---|---|---|
| Jan | 33°F | 16°F | 1.91in | 5.7in |
| Feb | 38°F | 19°F | 1.92in | 6in |
| Mar | 51°F | 29°F | 2.68in | 2.5in |
| Apr | 64°F | 40°F | 3.79in | 1in |
| May | 74°F | 52°F | 5.05in | 0in |
| Jun | 82°F | 62°F | 4.82in | 0in |
| Jul | 86°F | 64°F | 4.1in | 0in |
| Aug | 84°F | 63°F | 3.21in | 0in |
| Sep | 78°F | 55°F | 3.77in | 0in |
| Oct | 66°F | 43°F | 2.99in | 0in |
| Nov | 50°F | 31°F | 2.42in | 1.1in |
| Dec | 38°F | 22°F | 1.8in | 5in |
May, Jun, Aug, and Sep are the best time to see Macomb at its mildest; the rest of the year, plan around Jul's heat and Jan's cold.
Rain and snow in Macomb
Macomb averages 38.46in of precipitation a year across roughly 106 days with measurable rain or snow, and 21.3in of snow a year.
Where Macomb ranks
Macomb ranks 4534 of 4876 US cities in this dataset for comfort score, and 292 of 330 within IL. About 14,765 people live there.
If you need tomorrow's forecast, not the 30-year average
Everything above is a 30-year average from Prairie City 2s, IL US, 14.2 miles from Macomb, not a prediction for any specific day.
More on how this is worked out
What a 30-year climate normal actually is · Why this uses the nearest NOAA station