Centralia, IL Weather & Climate Normals
Centralia's real weather, in one number
Centralia, IL scores 43/100 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.
Centralia's hottest and coldest months
Centralia's hottest month is Jul, averaging 77°F; its coldest is Jan, averaging 30°F, a 46.8°F swing across the year, one of the widest gaps in this dataset.
Centralia's weather across the year
| Month | Avg high | Avg low | Precip | Snow |
|---|---|---|---|---|
| Jan | 39°F | 21°F | 2.87in | 3.4in |
| Feb | 44°F | 24°F | 2.58in | 4.5in |
| Mar | 54°F | 33°F | 3.9in | 0.5in |
| Apr | 66°F | 44°F | 4.81in | 0in |
| May | 75°F | 54°F | 5.2in | 0in |
| Jun | 84°F | 62°F | 4.08in | 0in |
| Jul | 88°F | 66°F | 3.85in | 0in |
| Aug | 87°F | 64°F | 3.54in | 0in |
| Sep | 81°F | 56°F | 3.29in | 0in |
| Oct | 69°F | 45°F | 3.45in | 0in |
| Nov | 55°F | 34°F | 4.09in | 0.4in |
| Dec | 43°F | 26°F | 3.02in | 3.2in |
May, Jun, Sep, and Oct are the best time to see Centralia at its mildest; the rest of the year, plan around Jul's heat and Jan's cold.
Rain and snow in Centralia
Centralia averages 44.68in of precipitation a year across roughly 110 days with measurable rain or snow, and 12in of snow a year.
Where Centralia ranks
Centralia ranks 4058 of 4876 US cities in this dataset for comfort score, and 262 of 330 within IL. About 11,787 people live there.
If you need tomorrow's forecast, not the 30-year average
Everything above is a 30-year average from Iuka 12 Sw, IL US, 8.5 miles from Centralia, 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