Boise

Idaho Weather in January

Average temperatures, rainfall, sunshine and the best places to visit in Idaho, the United States of America in January.

Planning a getaway to Idaho, the United States of America this January and curious about the weather you should prepare for? Discover all the vital details you need on this page, solving your puzzle:

What to Expect in Idaho in January

Idaho, the United States of America is a region in the United States of America. January in Idaho generally has temperatures that range from very cold to cold, with precipitation levels ranging from low to high. It's the height of winter.

Temperatures

During the day temperatures vary from very cold in Driggs at -2°C (28°F) to cold in Lewiston at 6°C (43°F). At night it cools down to -1°C (30°F) in Lewiston and -13°C (9°F) in Driggs. Typically, it's the chilliest month of the year. Making it a great time for staying indoors and enjoying the warmth. Make sure you're prepared by packing the right winter outfits.

For a closer look at conditions across Idaho, the United States of America, refer to the map below.

Precipitation

In January, precipitation varies across different areas. From low snowfall in Salmon with an average of 11 mm (0.4 in) to high snowfall in Wallace with 152 mm (6 in).

Average sunshine

Most places get a reasonable amount of sunshine. Take Boise as an example - it receives around 111 hours of sunlight, offering a nice mix of sunny and partly cloudy days. Want to compare this with brighter destinations? Try our weather planner to explore your options.

Explore Idaho by month

Pick a month to see the average temperature, rainfall and sunshine in Idaho — and find the best time to visit. (based on Boise)

Best Places to Visit in Idaho in January

Click on a destination dot for more details. Toggle the map to compare temperatures or precipitation across Idaho.

perfect weather
pleasant
tolerable
unpleasant
poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).

Popular Destinations in Idaho

What is the weather like in January for some of the most popular destinations in Idaho, the United States of America?

Temperature range in Idaho (January)

Precipitation variation in Idaho (January)

Boise

In January Boise generally has low temperatures with maximum daytime temperatures around 4°C (39°F), minimum nighttime temperatures around -5°C (23°F) and moderate monthly snow/rainfall. So on average the conditions are poor that month.

December
January
February
Max temperature
4°C (39°F)
4°C (39°F)
8°C (46°F)
Min temperature
-5°C (23°F)
-5°C (23°F)
-2°C (28°F)
Monthly sun hours
103 hours
111 hours
150 hours
Monthly snow/rainfall
49 mm (1.9 in)
34 mm (1.3 in)
25 mm (1 in)
Monthly rainy days
14 days
11 days
9 days
Weather conditions

Coeur d'Alene

In January Coeur d'Alene generally has low temperatures with maximum daytime temperatures around 3°C (37°F), minimum nighttime temperatures around -4°C (25°F) and moderate monthly snow/rainfall. So on average the conditions are poor that month.

December
January
February
Max temperature
2°C (36°F)
3°C (37°F)
5°C (41°F)
Min temperature
-4°C (25°F)
-4°C (25°F)
-3°C (27°F)
Monthly sun hours
60 hours
78 hours
120 hours
Monthly snow/rainfall
98 mm (3.9 in)
88 mm (3.5 in)
46 mm (1.8 in)
Monthly rainy days
17 days
16 days
13 days
Weather conditions

Idaho Falls

In January Idaho Falls generally has very low temperatures with maximum daytime temperatures around -2°C (28°F), minimum nighttime temperatures around -11°C (12°F) and low monthly snowfall. So on average the conditions are poor that month.

December
January
February
Max temperature
0°C (32°F)
-2°C (28°F)
1°C (34°F)
Min temperature
-10°C (14°F)
-11°C (12°F)
-9°C (16°F)
Monthly snowfall
24 mm (0.9 in)
22 mm (0.9 in)
14 mm (0.6 in)
Monthly rainy days
10 days
9 days
7 days
Weather conditions

Ketchum

In January Ketchum generally has very low temperatures with maximum daytime temperatures around 1°C (34°F), minimum nighttime temperatures around -12°C (10°F) and moderate monthly snow/rainfall. So on average the conditions are poor that month.

December
January
February
Max temperature
0°C (32°F)
1°C (34°F)
3°C (37°F)
Min temperature
-11°C (12°F)
-12°C (10°F)
-10°C (14°F)
Monthly snow/rainfall
83 mm (3.3 in)
50 mm (2 in)
36 mm (1.4 in)
Monthly rainy days
15 days
12 days
10 days
Weather conditions

Pocatello

In January Pocatello generally has very low temperatures with maximum daytime temperatures around 1°C (34°F), minimum nighttime temperatures around -8°C (18°F) and low monthly snow/rainfall. So on average the conditions are poor that month.

December
January
February
Max temperature
2°C (36°F)
1°C (34°F)
4°C (39°F)
Min temperature
-7°C (19°F)
-8°C (18°F)
-6°C (21°F)
Monthly snow/rainfall
32 mm (1.3 in)
28 mm (1.1 in)
20 mm (0.8 in)
Monthly rainy days
13 days
11 days
9 days
Weather conditions

Is your destination not in the list? Have a look at all destinations in Idaho, in the United States of America.

Popular cities in January

Day & night temperatures, rainfall and average weather in Idaho in January.

City Weather Day temp Night temp Rainfall
Boise 4°C (39°F) -5°C (23°F) 34 mm (1.3 in)
Coeur d'Alene 3°C (37°F) -4°C (25°F) 88 mm (3.5 in)
Idaho Falls -2°C (28°F) -11°C (12°F) 22 mm (0.9 in)
Ketchum 1°C (34°F) -12°C (10°F) 50 mm (2 in)
Pocatello 1°C (34°F) -8°C (18°F) 28 mm (1.1 in)
Island Park -2°C (28°F) -15°C (5°F) 83 mm (3.3 in)

Idaho weather in January: frequently asked questions

What is the weather like in Idaho, the United States of America in January?

Idaho, the United States of America typically experiences poor weather in January, part of the winter season. Daytime highs in Boise average around 4°C (39°F), and temperatures drop to about -5°C (23°F) at night.

What is the average temperature in Idaho, the United States of America in January?

Daytime temperatures in Boise peak at roughly 4°C (39°F) in January, dropping to about -5°C (23°F) overnight.

Does Idaho, the United States of America get a lot of snow/rain in January?

January is on the drier side in Idaho, the United States of America. Boise averages only about 34 mm (1.3 in), with most days staying dry.

Is January a Good Time to Visit Idaho, the United States of America?

In our opinion, January may not be the ideal time to visit Idaho, the United States of America due to the typically poor weather in Boise.

On average, the best time to visit Idaho, the United States of America is in May, June, September and October with generally perfect weather in Boise. On the other hand, the months of January, July, November and December tend to have poor weather conditions.

Interested in more climate information?

We have much more information about the climate in Idaho.

Weather and climate has detailed information for every country in the world. Are you going to the United States of America? Get detailed historical weather averages for many cities in the United States of America.

Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal travel conditions. Find out where to go with our weather planner.

Bucket list

Need travel inspiration? Check out our bucket list articles and be inspired.