Temperature
Cold by day, freezing at night.
42°Ftypical January high
Typical range
January climate
January in Boise
United States · North America
Cold weather is the main limitation.
Limited, but doable
Late
Daytime high
42°F
Lows around 29°F
Precipitation
10 days/mo
Sun
7 h/day
Air feel
Very dry
When to visit
Month-by-month fit
Best
Precipitation
Some precipitation is expected this month.
32%wet-day frequency
Precip amountWet-day chanceSnowfall
Sunshine
A mix of sunshine and cloud.
6.8 hJanuary sunshine
Heat & humidity by month
Humidity is rarely noticeable in the cool air.
Very dryJanuary Heat feel
Easy airWarm airHot airHumid air
Hourly temperature pattern
In January, afternoons feel about 32° and nights feel near 23°.
FreezingVery coldColdCoolComfortableWarmHotNight hours
Clear sky
Mostly cloudy skies this month.
38%January Clear sky
Clear skyCloud
Wind pattern
Calm winds are typical in January.
6 mphJanuary Light breeze
More detailIncludes daypart comfort
Typical January day
January late afternoons are around 40°F, easing to about 35°F in early evening.
Avg temp Typical range
Morning33°F
Rain14%
Cloud62%
Humid airLow
Sun intensityMinimal
Midday38°F
Rain15%
Cloud61%
Humid airLow
Sun intensityModerate
Late afternoon40°F
Rain15%
Cloud64%
Humid airLow
Sun intensityLow
Best windowEarly evening35°F
Rain15%
Cloud60%
Humid airLow
Sun intensityMinimal
Data tableView month-by-month numbers
View month-by-month numbers
| Month | High°F | Low°F | Rainin | Wet days | Sunh | Humidity% |
|---|---|---|---|---|---|---|
| Jan | 42 | 29 | 1.8 | 10 | 6.8 | 73 |
| Feb | 47 | 32 | 1.3 | 8 | 8.1 | 67 |
| Mar | 58 | 38 | 1.5 | 9 | 9.6 | 58 |
| Apr | 66 | 42 | 1.1 | 7 | 11.2 | 48 |
| May | 75 | 50 | 1.2 | 6 | 12.7 | 45 |
| Jun | 85 | 57 | 0.5 | 3 | 13.7 | 39 |
| Jul | 96 | 65 | 0.1 | 1 | 14.1 | 29 |
| Aug | 94 | 64 | 0.2 | 1 | 13.2 | 30 |
| Sep | 84 | 56 | 0.4 | 2 | 11.5 | 37 |
| Oct | 68 | 45 | 0.9 | 5 | 9.6 | 50 |
| Nov | 52 | 36 | 1.3 | 7 | 7.3 | 64 |
| Dec | 42 | 30 | 2.1 | 10 | 6.3 | 72 |
Similar climates
Similar
Similar travel styleDenverUnited StatesSimilar travel styleMoabUnited StatesSimilar travel styleLake TahoeUnited StatesSimilar travel styleJackson HoleUnited States
Want a side-by-side climate view? Compare Boise with Denver.
Climate data notePlanning guidance, not a forecast
Typical monthly values are based on long-term climate records. Useful for planning, not a forecast. Check the weather before you travel.
Sunshine: source type is not yet identified at metric level.
Local microclimates can vary by beach, neighborhood, trail, or elevation.
Last updated: Jun 1, 2026
Data & methodology