Weather in Westby, MT
Westby, Sunday, 18 October, 10:46
Overcast. Feels like 50°. High 57°, low 37°.
Monthly outlook for Westby, MT: average high 48.4°, average low 35.6°. That is 0.1° below the climate normal for October. Precipitation is expected on 4 days (about 0.5 inches), against a normal of 3 days and 0.5 inches. The warmest day looks like 23 October (67.9°), the coolest 31 October (26°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 18 October – 27 October | 54.8° | 51.1° | +2.1° |
| 28 October – 6 November | 37.7° | 43.6° | -3.3° |
| 7 November – 16 November | at normal | 37.4° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — McElroy (3 mi).
0
Westby, Monday, 19 October
Partly cloudy. High 62°, low 34°.
0Westby, Tuesday, 20 October
Overcast. High 60°, low 38°.
0
Westby, Wednesday, 21 October
Clear. High 58°, low 36°.
0Westby, Thursday, 22 October
Clear. High 65°, low 47°.
0.01
Westby, Friday, 23 October
Light rain. High 68°, low 55°.
0.04Westby, Saturday, 24 October
Light rain. High 46°, low 36°.
0Westby, Sunday, 25 October
Overcast. High 45°, low 35°.
0Westby, Monday, 26 October
Overcast. High 45°, low 34°.
0.28Westby, Tuesday, 27 October
Rain. High 43°, low 34°.
0.1Westby, Wednesday, 28 October
Light rain. High 44°, low 35°.
0.02Westby, Thursday, 29 October
Light rain. High 39°, low 35°.
0
Westby, Friday, 30 October
Light snow. High 34°, low 29°.
0Westby, Saturday, 31 October
Overcast. High 39°, low 26°.
0Westby, Sunday, 1 November
Overcast. High 37°, low 28°.
0.04Westby, Monday, 2 November
Light snow. High 34°, low 28°.
0.02
Westby, 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.
0.02Westby, Thursday, 12 November
Climate normal for this date — 60-year average.
0.02Westby, Friday, 13 November
Climate normal for this date — 60-year average.
0.02Westby, Saturday, 14 November
Climate normal for this date — 60-year average.
0.02Westby, Sunday, 15 November
Climate normal for this date — 60-year average.
0.03Westby, Monday, 16 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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