Snow in Caldwell, Idaho Winter storm alerts · 7-day snow forecast · average snowfall
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Caldwell averages 9.7 inches of snow a year. The snowiest month is December (4.2″), and snow usually falls from November through March. On about 5 days a year at least an inch falls. Snow covers the ground (1″+) on roughly 12 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
7
37°F
November
0.5″
<1
1
21
28°F
December
4.2″
2
4
27
23°F
January
3.4″
2
5
28
23°F
February
1.4″
1
2
23
26°F
March
0.2″
<1
<1
17
32°F
April
0″
0
0
8
36°F
May
0″
0
0
1
44°F
Year
9.7″
5
12
132
NOAA NCEI U.S. Climate Normals 1991–2020 — snowfall at Nampa Sugar Factory (7 mi from the city center, +98 ft elevation difference). Averages smooth out big years: single winters can bring half or double the normal.
9.7 inches in an average year (NOAA U.S. Climate Normals 1991–2020, Nampa Sugar Factory station, 7 miles away). The snowiest month is December with 4.2 inches.
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How many freezing nights does Caldwell have?
About 132 nights a year drop to 32 °F or below (NOAA 1991–2020); the coldest month, December, averages a low of 23 °F.