Average Precipitation for Idaho in January

The tables below give monthly averages for rainfall plus snowfall during January 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 January
Days	Place	Inches	Millimetres
8	Idaho Falls	0.7	17
8	Malad City	1.5	39
13	Pocatello	1.1	29
10	Preston	1.7	42
10	Saint Anthony	1.7	42

Central Idaho

January averages for total rainfall plus snowfall
Days	Place	Inches	Millimetres
9	Craters of the Moon Monument	2.0	50
10	Ketchum	2.3	57
9	Lake Walcott, Minidoka Dam	1.2	29
11	Middle Fork Lodge	1.4	37
6	Salmon	0.6	15
16	St. Maries	4.4	112
12	Stanley, Sawtooth Recreation Area	1.7	44
11	Twin Falls	1.2	30

Southwestern Idaho

Average amount of rain and snow in January
Days	Place	Inches	Millimetres
11	Boise	1.4	36
13	Brownlee Reservoir Dam	1.9	47
6	Bruneau	1.0	25
11	Idaho City	3.2	80
10	Lake Lowell, Deer Flat Dam	1.2	31
14	McCall	2.9	74

Northern Idaho

Precipitation totals for January
Days	Place	Inches	Millimetres
13	Bonners Ferry	2.6	67
14	Coeur d’Alene	3.2	82
17	Elk City	3.4	86
18	Kellogg	4.3	109
11	Lewiston	1.1	29
16	Moscow	3.3	85
11	Porthill	2.2	55
12	Riggins	1.3	33
16	Sandpoint	4.3	110
17	Wallace	4.5	114

Average Precipitation for Idaho in January

Eastern Idaho

Central Idaho

Southwestern Idaho

Northern Idaho

Reference

More Idaho Weather Information