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Climate Statistics · City

Average daily low in Boise

1991–2020 · 1 data point Updated Oct 21, 2026
Climate · Boise

Source: NOAA National Centers for Environmental Information — GHCN-Daily, 1991–2020

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Latest value · 1991–2020 42 °F
Weather through the year long-term average 1991–2020 · Boise Air Terminal weather station, 6 km away
39° 25°
Jan
46° 29°
Feb
55° 35°
Mar
62° 39°
Apr
72° 47°
May
81° 54°
Jun
93° 62°
Jul
91° 61°
Aug
80° 52°
Sep
65° 41°
Oct
49° 31°
Nov
39° 25°
Dec
1.4
1.0
1.3
1.2
1.4
0.7
0.2
0.2
0.4
0.8
1.2
1.5
High and low, °F Precipitation, inches

Source: NOAA National Centers for Environmental Information — GHCN-Daily, 1991–2020

What it means

The typical coolest temperature of the day, usually at night, averaged over the year.

How it is calculated

Mean of the twelve monthly normals of the daily minimum at the nearest weather station: 1991–2020, or the latest ten years where the older record is missing.