Average Precipitation for Idaho in December





The tables below give monthly averages for rainfall plus snowfall during December at cities, towns and parks in Idaho.

Each place has a total for the amount of precipitation it usually receives this month. There is also a count of the number of days with wet weather, when precipitation amounts to 0.01 inches (0.25 millimetres) or more.

The precipitation totals are averages based on weather data collected from 1991 to 2020 for the US National Centers for Environmental Information.

You can jump to a separate table for each region of the state: Eastern, Central, Southwestern and Northern Idaho.

Eastern Idaho

Average monthly precipitation in December
Days Place Inches Milli­metres
10 Idaho Falls 0.8 20
7 Malad City 1.1 28
14 Pocatello 1.2 31
10 Preston 1.6 40
11 Saint Anthony 1.4 36

Central Idaho

December averages for total rainfall plus snowfall
Days Place Inches Milli­metres
10 Craters of the Moon Monument 2.2 56
11 Ketchum 2.6 65
8 Lake Walcott, Minidoka Dam 1.2 30
11 Middle Fork Lodge 1.8 45
7 Salmon 0.7 19
16 St. Maries 4.4 113
14 Stanley, Sawtooth Recreation Area 1.9 49
10 Twin Falls 1.4 37

Southwestern Idaho

Average amount of rain and snow in December
Days Place Inches Milli­metres
12 Boise 1.5 39
13 Brownlee Reservoir Dam 2.0 52
6 Bruneau 1.0 24
12 Idaho City 3.5 90
9 Lake Lowell, Deer Flat Dam 1.1 28
16 McCall 3.5 88

Northern Idaho

Precipitation totals for December
Days Place Inches Milli­metres
13 Bonners Ferry 3.2 81
13 Coeur d’Alene 3.5 88
15 Elk City 2.8 71
18 Kellogg 3.5 88
11 Lewiston 1.1 29
16 Moscow 3.5 88
12 Porthill 2.5 62
12 Riggins 1.4 37
15 Sandpoint 4.6 117
16 Wallace 4.6 116
Reference

NOAA National Centers for Environmental Information (NCEI). Climate Normals.

Idaho Precipitation
Back to Top