Snow in Ballwin, Missouri Winter storm alerts · 7-day snow forecast · average snowfall
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Ballwin averages 10.2 inches of snow a year. The snowiest month is January (4.1″), and snow usually falls from November through April. On about 4 days a year at least an inch falls. Snow covers the ground (1″+) on roughly 11 days of an average winter.
Average snowfall by month
Month
Snowfall
Days 1″+
Days with snow cover
Freezing nights
Avg. low
October
0″
0
0
3
45°F
November
0.5″
<1
<1
13
34°F
December
1.7″
1
3
23
26°F
January
4.1″
1
5
26
22°F
February
2.8″
1
2
22
26°F
March
1.0″
<1
1
14
34°F
April
0.1″
<1
<1
4
44°F
Year
10.2″
4
11
105
NOAA NCEI U.S. Climate Normals 1991–2020 — snowfall at Valley Park (4 mi from the city center, -105 ft elevation difference); temperatures at St Louis Sprt Of S L Airport. Averages smooth out big years: single winters can bring half or double the normal.
10.2 inches in an average year (NOAA U.S. Climate Normals 1991–2020, Valley Park station, 4 miles away). The snowiest month is January with 4.1 inches.
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How many freezing nights does Ballwin have?
About 105 nights a year drop to 32 °F or below (NOAA 1991–2020); the coldest month, January, averages a low of 22 °F.