Boise weather in December
Temperature, rain and sunshine in December: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in December
Poor
Best time to visit: May – June, September – October
What is the weather like in Boise in December?
In December, Boise is cold: daytime highs average 4 °C, and nights often drop below freezing (−4 °C). Expect around 4 hours of sunshine a day. Rain is frequent, with about 10 rainy days and 45 mm in total. Snow falls on about 3 days. All in all, December is not an ideal month for a holiday in Boise.
December compared
How the weather changes from November to January. Tap a month to open it.
| NovemberNov | DecemberDec | JanuaryJan | |
|---|---|---|---|
| Score | 38 | 21 | 25 |
| Day | 10° | 4° | 4° |
| Night | 0° | −4° | −5° |
| Sun | 5 h | 4 h | 5 h |
| Rain days | 7 | 10 | 9 |
More details for December
- Daylight
- 8 h 58 min08:11 – 17:09
- UV index
- 1 · lowclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or moreAll months
- Wind
- 15 km/haverage daily peakAll months
- Cloud cover
- 63 %on averageAll months
- Hot days
- 0 days30 °C or moreAll months
- Snow days
- 3 days1 cm or more of fresh snowAll months
- Time zone
- UTC−7America/Boise
How the score comes together
- Temperatureweight 50 %0 %
- Sunshineweight 20 %17 %
- Few rainy daysweight 30 %60 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in December
- Warm jacket
- Hat, scarf & gloves
- Rain jacket or umbrella
Boise in December: quick answers
Is Boise hot in December?
No. In December, Boise is cold: daytime highs average 4 °C and nights drop to about −4 °C.
Does it rain much in Boise in December?
Rain is frequent, with about 10 rainy days and 45 mm in total.
Boise month by month
The whole year in BoiseAll destinations: USAWhere to go in December
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences