St. Ann, MO Weather & Climate Normals
What a normal year in St. Ann actually looks like
On the 30-year record NOAA keeps for St. Ann, MO, the comfort score comes out to 42/100, strongly seasonal: Comfortable weather is limited to a shorter window; summers, winters, or precipitation swing wide. Only 4 months a year land in the 55–75°F range this site treats as mild.
How much St. Ann's weather actually swings
Average temperatures in St. Ann run from 32°F in Jan up to 80°F in Jul, a 48.3°F seasonal swing, one of the widest gaps in this dataset.
St. Ann, month by month
| Month | Avg high | Avg low | Precip | Snow |
|---|---|---|---|---|
| Jan | 40°F | 24°F | 2.59in | 5.7in |
| Feb | 46°F | 28°F | 2.23in | 4.3in |
| Mar | 57°F | 37°F | 3.5in | 2.3in |
| Apr | 68°F | 47°F | 4.73in | 0.2in |
| May | 77°F | 58°F | 4.82in | 0in |
| Jun | 86°F | 67°F | 4.49in | 0in |
| Jul | 90°F | 71°F | 3.93in | 0in |
| Aug | 88°F | 69°F | 3.38in | 0in |
| Sep | 81°F | 61°F | 2.96in | 0in |
| Oct | 69°F | 49°F | 3.15in | 0in |
| Nov | 56°F | 37°F | 3.42in | 0.9in |
| Dec | 45°F | 29°F | 2.5in | 3.2in |
If you're timing a visit, Apr, May, Sep, and Oct are St. Ann's mildest stretch; if you're moving there, you should plan around Jul's heat and Jan's cold instead.
How wet St. Ann actually gets
Over a typical year, St. Ann sees about 41.7in of precipitation a year across roughly 114 days with measurable rain or snow, with 16.6in of snow a year.
St. Ann against the rest of the country
Out of 4876 cities scored here, St. Ann comes in at 4235; within MO alone it ranks 118 of 135. Population is about 12,704.
Checking the actual forecast
These figures come from St Louis Lambert Intl Ap, MO US, the NOAA station 1.9 miles from St. Ann, 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