Cold steppe climate
Climate Westby - Montana
Annual high51ºF
Annual low27ºF
Precipitation13.98 inch
| Month | HighºF | LowºF | Precipinch |
|---|---|---|---|
| Jan | 19 | -3 | 0.37 |
| Feb | 25 | 3 | 0.26 |
| Mar | 37 | 15 | 0.59 |
| Apr | 54 | 28 | 0.84 |
| May | 65 | 40 | 2.04 |
| Jun | 74 | 49 | 2.83 |
| Jul | 80 | 54 | 2.56 |
| Aug | 81 | 52 | 1.58 |
| Sep | 69 | 40 | 1.14 |
| Oct | 54 | 28 | 0.88 |
| Nov | 35 | 15 | 0.50 |
| Dec | 22 | 2 | 0.39 |
- JanHigh 19ºFLow -3ºFPrecip 0.37 inch
- FebHigh 25ºFLow 3ºFPrecip 0.26 inch
- MarHigh 37ºFLow 15ºFPrecip 0.59 inch
- AprHigh 54ºFLow 28ºFPrecip 0.84 inch
- MayHigh 65ºFLow 40ºFPrecip 2.04 inch
- JunHigh 74ºFLow 49ºFPrecip 2.83 inch
- JulHigh 80ºFLow 54ºFPrecip 2.56 inch
- AugHigh 81ºFLow 52ºFPrecip 1.58 inch
- SepHigh 69ºFLow 40ºFPrecip 1.14 inch
- OctHigh 54ºFLow 28ºFPrecip 0.88 inch
- NovHigh 35ºFLow 15ºFPrecip 0.50 inch
- DecHigh 22ºFLow 2ºFPrecip 0.39 inch
Climate summary
What is the average weather in Westby, Montana?
Westby experiences a cold semi-arid climate, defined by very large seasonal temperature contrasts. Summers are warm, but winters are very cold due to the inland location. The area is dry overall, with precipitation generally low and arriving in brief showers, though summer is the wettest season.
Westby weather averages
Annual high51ºF
Annual low27ºF
Precipitation13.98 inch
Daily normals Westby - Montana - January
| Day | HighºF | LowºF | Prec/ | Prec/ |
|---|---|---|---|---|
| Jan 1 | 19.8 | -0.8 | 0.02 | 0.02 |
| Jan 2 | 19.7 | -1.0 | 0.03 | 0.03 |
| Jan 3 | 19.6 | -1.2 | 0.05 | 0.05 |
| Jan 4 | 19.5 | -1.4 | 0.06 | 0.06 |
| Jan 5 | 19.4 | -1.6 | 0.08 | 0.08 |
| Jan 6 | 19.3 | -1.8 | 0.09 | 0.09 |
| Jan 7 | 19.2 | -1.9 | 0.11 | 0.11 |
| Jan 8 | 19.2 | -2.1 | 0.12 | 0.12 |
| Jan 9 | 19.2 | -2.2 | 0.13 | 0.13 |
| Jan 10 | 19.1 | -2.3 | 0.14 | 0.14 |
| Jan 11 | 19.1 | -2.4 | 0.15 | 0.15 |
| Jan 12 | 19.1 | -2.5 | 0.16 | 0.16 |
| Jan 13 | 19.1 | -2.6 | 0.17 | 0.17 |
| Jan 14 | 19.1 | -2.6 | 0.18 | 0.18 |
| Jan 15 | 19.1 | -2.7 | 0.18 | 0.18 |
| Jan 16 | 19.2 | -2.7 | 0.19 | 0.19 |
| Jan 17 | 19.2 | -2.8 | 0.19 | 0.19 |
| Jan 18 | 19.2 | -2.8 | 0.20 | 0.20 |
| Jan 19 | 19.3 | -2.8 | 0.21 | 0.21 |
| Jan 20 | 19.4 | -2.8 | 0.22 | 0.22 |
| Jan 21 | 19.4 | -2.7 | 0.23 | 0.23 |
| Jan 22 | 19.5 | -2.7 | 0.24 | 0.24 |
| Jan 23 | 19.6 | -2.6 | 0.25 | 0.25 |
| Jan 24 | 19.7 | -2.5 | 0.26 | 0.26 |
| Jan 25 | 19.8 | -2.5 | 0.28 | 0.28 |
| Jan 26 | 19.9 | -2.4 | 0.29 | 0.29 |
| Jan 27 | 20.0 | -2.3 | 0.31 | 0.31 |
| Jan 28 | 20.1 | -2.1 | 0.33 | 0.33 |
| Jan 29 | 20.2 | -2.0 | 0.34 | 0.34 |
| Jan 30 | 20.3 | -1.9 | 0.36 | 0.36 |
| Jan 31 | 20.5 | -1.7 | 0.37 | 0.37 |
Precipitation and snow add up through the month (/mo) and the year (/yr)
Weather history Westby - September 2026
| Day | HighºF | LowºF | Precip.inch |
|---|---|---|---|
| Sep 1 | 72.0 | 50.0 | 0.00 |
| Sep 2 | 78.1 | 43.0 | 0.00 |
| Sep 3 | 84.9 | 52.0 | 0.11 |
| Sep 4 | 82.0 | 59.0 | 0.00 |
| Sep 5 | 87.1 | 53.1 | 0.00 |
| Sep 6 | 80.1 | 64.9 | 0.00 |
| Sep 7 | 84.9 | 50.0 | 1.20 |
| Sep 8 | 82.0 | 50.0 | 0.09 |
| Sep 9 | 70.0 | 48.9 | 0.02 |
| Sep 10 | 75.9 | 48.9 | 0.00 |
| Sep 11 | 84.0 | 50.0 | 0.00 |
| Sep 12 | 71.1 | 50.0 | 0.00 |
| Sep 13 | 60.1 | 41.0 | 0.00 |
| Sep 14 | 68.0 | 35.1 | 0.28 |
| Sep 15 | 59.0 | 48.0 | 0.35 |
| Sep 16 | 60.1 | 48.0 | 0.00 |
| Sep 17 | 59.0 | 41.0 | 0.00 |
| Sep 18 | 70.0 | 32.0 | 0.00 |
| Sep 19 | 75.0 | 59.0 | 0.00 |
| Sep 20 | 66.0 | 41.0 | 0.05 |
| Sep 21 | 59.0 | 50.0 | 0.05 |
| Sep 22 | 69.1 | 48.0 | 0.00 |
| Sep 23 | 73.0 | 45.0 | 0.00 |
| Sep 24 | 66.9 | 51.1 | 0.00 |
| Sep 25 | 82.9 | 53.1 | 0.00 |
| Sep 26 | 78.1 | 55.0 | 0.05 |
| Sep 27 | 70.0 | 39.9 | 0.00 |
| Sep 28 | 62.1 | 42.1 | 0.00 |
| Sep 29 | 70.0 | 39.9 | 0.00 |
| Sep 30 | 69.1 | 39.9 | 0.00 |
The data for September 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 temperature87.1ºF · Sep 5
- Lowest max temperature59.0ºF · Sep 15
- Highest min temperature64.9ºF · Sep 6
- Lowest min temperature32.0ºF · Sep 18
Geo Westby - Montana
Location
- Country
- United States
- State
- Montana
- County
- Sheridan
- City
- Westby
- Zip Code
- 59275
- Elevation
- 2070 ft
- Longitude
- -104.05
- Latitude
- 48.87
- ICAO
- –
- IATA
- –