Arnold, MO Weather & Climate Normals
Arnold's real weather, in one number
Arnold, MO scores 48/100 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.
Arnold's hottest and coldest months
Arnold's hottest month is Jul, averaging 78°F; its coldest is Jan, averaging 32°F, a 46.1°F swing across the year, one of the widest gaps in this dataset.
Arnold's weather across the year
| Month | Avg high | Avg low | Precip | Snow |
|---|---|---|---|---|
| Jan | 41°F | 22°F | 2.68in | 2.1in |
| Feb | 46°F | 25°F | 2.51in | 2.7in |
| Mar | 56°F | 34°F | 4in | 1.1in |
| Apr | 68°F | 44°F | 4.91in | 0.2in |
| May | 76°F | 54°F | 4.76in | 0in |
| Jun | 85°F | 63°F | 4.74in | 0in |
| Jul | 88°F | 67°F | 3.83in | 0in |
| Aug | 87°F | 65°F | 3.59in | 0in |
| Sep | 81°F | 57°F | 3.38in | 0in |
| Oct | 70°F | 46°F | 2.83in | 0in |
| Nov | 56°F | 35°F | 3.54in | 0.6in |
| Dec | 45°F | 27°F | 2.8in | 2.5in |
Apr, May, Jun, Sep, and Oct are the best time to see Arnold at its mildest; the rest of the year, plan around Jul's heat and Jan's cold.
Rain and snow in Arnold
Arnold averages 43.57in of precipitation a year across roughly 101 days with measurable rain or snow, and 9.2in of snow a year.
Where Arnold ranks
Arnold ranks 2361 of 4876 US cities in this dataset for comfort score, and 42 of 135 within MO. About 21,036 people live there.
If you need tomorrow's forecast, not the 30-year average
Everything above is a 30-year average from Festus, MO US, 13.5 miles from Arnold, 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