Historical Weather in Boise, ID
See 55+ years of weather history for any date in Boise going back to 1970.
Part of Idaho weather history · Idaho temperature records
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Today in Boise Weather HistorySee records, averages, and 55+ years of data for today's date
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Monthly Climate Averages
Historical temperature and precipitation averages for Boise, ID, based on 55+ years of weather data.
Warmest MonthJulyAvg High: 92°F / Low: 60°F
Coldest MonthJanuaryAvg High: 38°F / Low: 24°F
Jan
38°/ 24°
💧 3.2"
❄️ 1.0"
Feb
45°/ 28°
💧 3.0"
❄️ 0.9"
Mar
55°/ 34°
💧 3.5"
❄️ 0.8"
Apr
62°/ 38°
💧 3.8"
❄️ 0.6"
May
72°/ 46°
💧 4.3"
❄️ 0.7"
Jun
82°/ 53°
💧 3.6"
Jul
92°/ 60°
💧 3.0"
Aug
90°/ 59°
💧 2.9"
Sep
79°/ 51°
💧 3.8"
Oct
65°/ 40°
💧 3.6"
❄️ 0.9"
Nov
49°/ 31°
💧 3.2"
❄️ 1.0"
Dec
39°/ 24°
💧 3.3"
❄️ 1.1"
Temperatures in Fahrenheit. Precipitation and snowfall in inches.
Boise, ID Temperature Range by Month
Average monthly highs and lows. The shaded band shows the typical daily temperature range.
Avg high Avg low
Boise, ID Monthly Precipitation
Average rainfall and snowfall per month, in inches.
Rain (in) Snow (in)
Boise, ID Daily Temperature Calendar
Average daily high temperature for every day of the year. Each cell is the climatological mean for that calendar day across 55 years of NOAA data.
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Best Time to Visit Boise, ID
Boise, ID has no months that meet our "pleasant" threshold — every season has tradeoffs.
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Pleasant (65-82°F, ≤2.5" rain) Mild Less ideal
Boise Temperature Records
- Record High: The hottest temperature ever recorded in Boise, ID is 113°F, set on July 12, 2002.
- Record Low: The coldest temperature ever recorded in Boise, ID is -25°F, set on December 22, 1990.
- Data Coverage: Based on 57 years of data from NOAA weather station: BOISE AIR TERMINAL.
All-Time Record High
113°F
July 12, 2002
All-Time Record Low
-25°F
December 22, 1990
Monthly Temperature Records in Boise
| Month | Record High | Record Low |
|---|---|---|
| January | 66°F(2024) | -14°F(1977) |
| February | 72°F(1977) | -17°F(1989) |
| March | 81°F(2025) | 2°F(2022) |
| April | 93°F(1987) | 13°F(2011) |
| May | 103°F(2003) | 18°F(2022) |
| June | 110°F(2015) | 26°F(2002) |
| July | 113°F(2002) | 33°F(2000) |
| August | 110°F(2018) | 33°F(2010) |
| September | 105°F(2007) | 23°F(1970) |
| October | 95°F(1992) | 5°F(2002) |
| November | 80°F(1988) | -9°F(2010) |
| December | 65°F(1987) | -25°F(1990) |
Boise Snow RecordsSee the top 10 snowiest days ever recorded
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Holiday Weather in Boise
Weather Analysis & Trends
RecordsHottest Temperatures Ever Recorded in Every US StateAll 50 state record highs ranked, including Idaho.Severe WeatherTornado Season 2026: Forecasts & What to ExpectAn EF5 already, and the peak still ahead.Climate ForecastEl Niño 2026: What Every US Region Should Expect85% likely by late 2026. Region-by-region impact analysis.