Weather in Westby, MT
Westby, Tuesday, 13 October, 16:21
Clear. Feels like 45°. High 48°, low 35°.
Monthly outlook for Westby, MT: average high 45.9°, average low 30.9°. That is 3° below the climate normal for October. Precipitation is expected on 2 days (about 1.6 inches), against a normal of 3 days and 0.5 inches. The warmest day looks like 17 October (69.2°), the coolest 28 October (9.5°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 13 October – 22 October | 54.7° | 52.6° | +1.1° |
| 23 October – 1 November | 31.2° | 47.2° | -8.9° |
| 2 November – 11 November | at normal | 39.9° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — McElroy (3 mi).
0Westby, Wednesday, 14 October
Clear. High 55°, low 31°.
0
Westby, Thursday, 15 October
Overcast. High 47°, low 35°.
0Westby, Friday, 16 October
Clear. High 54°, low 28°.
0
Westby, Saturday, 17 October
Mostly clear. High 69°, low 39°.
0Westby, Sunday, 18 October
Clear. High 58°, low 43°.
0Westby, Monday, 19 October
Overcast. High 62°, low 39°.
0Westby, Tuesday, 20 October
Overcast. High 60°, low 47°.
0Westby, Wednesday, 21 October
Overcast. High 49°, low 39°.
0.95
Westby, Thursday, 22 October
Rain. High 45°, low 41°.
0
Westby, Friday, 23 October
Partly cloudy. High 43°, low 35°.
0.64
Westby, Saturday, 24 October
Snow. High 34°, low 31°.
0.01Westby, Sunday, 25 October
Light snow. High 30°, low 17°.
0Westby, Monday, 26 October
Overcast. High 29°, low 16°.
0Westby, Tuesday, 27 October
Partly cloudy. High 24°, low 10°.
0Westby, Wednesday, 28 October
Mostly clear. High 27°, low 10°.
0.04Westby, Thursday, 29 October
Climate normal for this date — 60-year average.
0.03Westby, Friday, 30 October
Climate normal for this date — 60-year average.
0.03Westby, Saturday, 31 October
Climate normal for this date — 60-year average.
0.04Westby, Sunday, 1 November
Climate normal for this date — 60-year average.
0.04Westby, Monday, 2 November
Climate normal for this date — 60-year average.
0.02Westby, Tuesday, 3 November
Climate normal for this date — 60-year average.
0.03Westby, Wednesday, 4 November
Climate normal for this date — 60-year average.
0.03Westby, Thursday, 5 November
Climate normal for this date — 60-year average.
0.02Westby, Friday, 6 November
Climate normal for this date — 60-year average.
0.02Westby, Saturday, 7 November
Climate normal for this date — 60-year average.
0.04Westby, Sunday, 8 November
Climate normal for this date — 60-year average.
0.03Westby, Monday, 9 November
Climate normal for this date — 60-year average.
0.03Westby, Tuesday, 10 November
Climate normal for this date — 60-year average.
0.02Westby, Wednesday, 11 November
Climate normal for this date — 60-year average.
About the monthly outlook
How accurate is a 30-day forecast?
The first 16 days come from weather models — reliable for the first 3–5 days and progressively less so after that. Days 17 through 30 for Westby, MT are built from the climate normal, the 60-year average, so they show typical weather for those dates rather than a specific forecast.
What does "above normal" mean?
We compare the forecast against the climate normal for those exact calendar days, computed from 60 years of observations. The deviation shows how much the coming month differs from a typical one.
Where do the 66-year records come from?
They are real temperature extremes recorded in Westby, MT since 1960: the highest and lowest reading for each calendar date, with the year it happened.
How often is it updated?
The forecast portion refreshes every hour; the climate portion is based on long-term data and stays stable.
Sun and moon today
Weather history
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