Average Precipitation for Idaho in December

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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. Most sites also have information on the number of days with wet weather. That includes the days when precipitation amounts to 0.01 inches (0.25 millimetres) or more.

The precipitation totals are averages based on weather data collected from 1981 to 2010 for the NOAA National Climatic Data Center.

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
  – Driggs 1.6   42
10 Idaho Falls 0.9   22
13 Island Park 3.1   80
  8 Malad City 1.1   29
14 Pocatello 1.3   34
10 Preston 1.7   43
10 Saint Anthony 1.4   35

Central Idaho

December averages for total rainfall plus snowfall
Days Place Inches Millimetres
  9 Craters of the Moon Monument 2.1   53
  5 Grouse 1.2   31
10 Ketchum 2.6   66
  8 Lake Walcott, Minidoka Dam 1.1   28
10 Middle Fork Lodge 1.6   41
  8 Salmon 0.7   18
  6 Stanley, Sawtooth Recreation Area 1.7   44
10 Twin Falls 1.4   36

Southwestern Idaho

Average amount of rain and snow in December
Days Place Inches Millimetres
12 Boise 1.6   39
12 Brownlee Reservoir Dam 2.1   53
  5 Bruneau 0.9   23
12 Idaho City 3.5   89
  9 Lake Lowell, Deer Flat Dam 1.3   33
14 McCall 3.3   85
  9 Mountain Home 1.6   40

Northern Idaho

Precipitation totals for December
Days Place Inches Millimetres
13 Coeur d’Alene 3.5   89
15 Elk City 2.7   68
17 Kellogg 3.7   95
11 Lewiston 1.0   25
15 Moscow 3.0   76
10 Porthill 2.4   60
17 Powell 4.5 114
10 Riggins 1.4   35
15 Sandpoint 4.6 118
16 Wallace 5.0 128
Reference

National Climatic Data Center. NOAA's 1981-2010 Climate Normals.

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