Cold steppe climate
Climate Boise - Idaho
Annual high64ºF
Annual low41ºF
Precipitation11.73 inch
| Month | HighºF | LowºF | Precipinch | Snowinch |
|---|---|---|---|---|
| Jan | 38 | 25 | 1.24 | 5 |
| Feb | 45 | 28 | 0.99 | 3 |
| Mar | 55 | 34 | 1.39 | 1 |
| Apr | 62 | 39 | 1.23 | 0 |
| May | 72 | 47 | 1.39 | 0 |
| Jun | 81 | 54 | 0.69 | 0 |
| Jul | 91 | 60 | 0.33 | 0 |
| Aug | 90 | 60 | 0.24 | 0 |
| Sep | 79 | 51 | 0.58 | 0 |
| Oct | 65 | 41 | 0.75 | 0 |
| Nov | 48 | 32 | 1.35 | 3 |
| Dec | 38 | 24 | 1.55 | 7 |
- JanHigh 38ºFLow 25ºFPrecip 1.24 inch
- FebHigh 45ºFLow 28ºFPrecip 0.99 inch
- MarHigh 55ºFLow 34ºFPrecip 1.39 inch
- AprHigh 62ºFLow 39ºFPrecip 1.23 inch
- MayHigh 72ºFLow 47ºFPrecip 1.39 inch
- JunHigh 81ºFLow 54ºFPrecip 0.69 inch
- JulHigh 91ºFLow 60ºFPrecip 0.33 inch
- AugHigh 90ºFLow 60ºFPrecip 0.24 inch
- SepHigh 79ºFLow 51ºFPrecip 0.58 inch
- OctHigh 65ºFLow 41ºFPrecip 0.75 inch
- NovHigh 48ºFLow 32ºFPrecip 1.35 inch
- DecHigh 38ºFLow 24ºFPrecip 1.55 inch
Climate summary
What is the average weather in Boise, Idaho?
Boise experiences a cold semi-arid climate, marked by very large seasonal temperature contrasts. Summers are hot and dry, while winters are cold and bring regular snowfall. Precipitation is generally low throughout the year, with a strong seasonal pattern that makes spring the wettest season and summer the driest.
Boise weather averages
Annual high64ºF
Annual low41ºF
Precipitation11.73 inch
Snowfall19 inch
Daily normals Boise - Idaho - January
| Day | HighºF | LowºF | Prec/ | Prec/ | Snow/ | Snow/ |
|---|---|---|---|---|---|---|
| Jan 1 | 37.4 | 24.4 | 0.05 | 0.05 | 0.20 | 0.20 |
| Jan 2 | 37.4 | 24.4 | 0.10 | 0.10 | 0.40 | 0.40 |
| Jan 3 | 37.4 | 24.5 | 0.14 | 0.14 | 0.60 | 0.60 |
| Jan 4 | 37.5 | 24.5 | 0.19 | 0.19 | 0.80 | 0.80 |
| Jan 5 | 37.5 | 24.6 | 0.24 | 0.24 | 1.10 | 1.10 |
| Jan 6 | 37.6 | 24.6 | 0.29 | 0.29 | 1.30 | 1.30 |
| Jan 7 | 37.6 | 24.7 | 0.34 | 0.34 | 1.40 | 1.40 |
| Jan 8 | 37.7 | 24.8 | 0.39 | 0.39 | 1.60 | 1.60 |
| Jan 9 | 37.8 | 24.9 | 0.44 | 0.44 | 1.80 | 1.80 |
| Jan 10 | 37.9 | 24.9 | 0.49 | 0.49 | 2.00 | 2.00 |
| Jan 11 | 38.0 | 25.0 | 0.53 | 0.53 | 2.20 | 2.20 |
| Jan 12 | 38.1 | 25.1 | 0.58 | 0.58 | 2.30 | 2.30 |
| Jan 13 | 38.2 | 25.2 | 0.63 | 0.63 | 2.50 | 2.50 |
| Jan 14 | 38.3 | 25.3 | 0.67 | 0.67 | 2.70 | 2.70 |
| Jan 15 | 38.4 | 25.4 | 0.72 | 0.72 | 2.90 | 2.90 |
| Jan 16 | 38.5 | 25.4 | 0.76 | 0.76 | 3.00 | 3.00 |
| Jan 17 | 38.7 | 25.5 | 0.81 | 0.81 | 3.20 | 3.20 |
| Jan 18 | 38.8 | 25.6 | 0.85 | 0.85 | 3.40 | 3.40 |
| Jan 19 | 38.9 | 25.7 | 0.90 | 0.90 | 3.60 | 3.60 |
| Jan 20 | 39.1 | 25.8 | 0.94 | 0.94 | 3.70 | 3.70 |
| Jan 21 | 39.2 | 25.9 | 0.99 | 0.99 | 3.90 | 3.90 |
| Jan 22 | 39.4 | 26.0 | 1.04 | 1.04 | 4.00 | 4.00 |
| Jan 23 | 39.6 | 26.1 | 1.08 | 1.08 | 4.20 | 4.20 |
| Jan 24 | 39.8 | 26.2 | 1.12 | 1.12 | 4.30 | 4.30 |
| Jan 25 | 40.0 | 26.3 | 1.17 | 1.17 | 4.50 | 4.50 |
| Jan 26 | 40.1 | 26.4 | 1.21 | 1.21 | 4.60 | 4.60 |
| Jan 27 | 40.4 | 26.5 | 1.25 | 1.25 | 4.80 | 4.80 |
| Jan 28 | 40.6 | 26.6 | 1.29 | 1.29 | 4.90 | 4.90 |
| Jan 29 | 40.8 | 26.7 | 1.33 | 1.33 | 5.00 | 5.00 |
| Jan 30 | 41.0 | 26.8 | 1.37 | 1.37 | 5.20 | 5.20 |
| Jan 31 | 41.3 | 26.9 | 1.41 | 1.41 | 5.30 | 5.30 |
Precipitation and snow add up through the month (/mo) and the year (/yr)
Weather history Boise - October 2026
| Day | HighºF | LowºF | Precip.inch |
|---|---|---|---|
| Oct 1 | 81.0 | 50.0 | 0.00 |
| Oct 2 | 81.0 | 52.0 | 0.00 |
| Oct 3 | 84.9 | 52.0 | 0.00 |
| Oct 4 | – | – | – |
| Oct 5 | – | – | – |
| Oct 6 | – | – | – |
| Oct 7 | 84.0 | 51.1 | 0.00 |
| Oct 8 | 86.0 | 55.0 | 0.00 |
| Oct 9 | 84.9 | 53.1 | 0.00 |
| Oct 10 | 64.9 | 50.0 | 0.00 |
| Oct 11 | 55.9 | 42.1 | 0.02 |
| Oct 12 | 55.0 | 39.0 | 0.00 |
| Oct 13 | 62.1 | 37.0 | 0.00 |
| Oct 14 | 69.1 | 37.9 | 0.00 |
| Oct 15 | 71.1 | 39.0 | 0.00 |
| Oct 16 | 78.1 | 46.0 | 0.00 |
| Oct 17 | – | – | – |
| Oct 18 | 73.0 | 44.1 | 0.00 |
| Oct 19 | – | – | – |
| Oct 20 | – | – | – |
| Oct 21 | 78.1 | 54.0 | T |
| Oct 22 | 75.0 | 50.0 | 0.13 |
| Oct 23 | 57.0 | 37.9 | 0.32 |
| Oct 24 | 57.9 | 33.1 | 0.00 |
| Oct 25 | 64.9 | 39.0 | 0.00 |
| Oct 26 | 61.0 | 39.9 | 0.01 |
| Oct 27 | 57.0 | 39.0 | 0.01 |
| Oct 28 | 57.9 | 35.1 | 0.00 |
| Oct 29 | – | – | – |
| Oct 30 | – | – | – |
| Oct 31 | – | – | – |
The data for October 2026 is incomplete: some days or values are missing.
- –No data
- –Not yet observed or received
- TTrace, too small to measure
Observed extremes
- Highest max temperature86.0ºF · Oct 8
- Lowest max temperature55.0ºF · Oct 12
- Highest min temperature55.0ºF · Oct 8
- Lowest min temperature33.1ºF · Oct 24
Geo Boise - Idaho
Location
- Country
- United States
- State
- Idaho
- County
- Ada
- City
- Boise
- Zip Code
- 83702
- Elevation
- 2680 ft
- Longitude
- -116.22
- Latitude
- 43.62
- ICAO
- –
- IATA
- –