Weather in Chapman, MT
Chapman, Sunday, 11 October, 16:14
Snow. Feels like 26°. High 36°, low 32°.
Monthly outlook for Chapman, MT: average high 49.5°, average low 36.6°. That is 1.9° below the climate normal for October. Precipitation is expected on 2 days (about 0.8 inches), against a normal of 2 days and 0.4 inches. The warmest day looks like 17 October (68.7°), the coolest 26 October (24.3°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 11 October – 20 October | 53° | 53.9° | -0.5° |
| 21 October – 30 October | 43.6° | 49.4° | -3.3° |
| 31 October – 9 November | at normal | 43.2° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Caldwell (7 mi).
0.41Chapman, Monday, 12 October
Snow. High 34°, low 32°.
0
Chapman, Tuesday, 13 October
Partly cloudy. High 40°, low 27°.
0
Chapman, Wednesday, 14 October
Clear. High 54°, low 28°.
0Chapman, Thursday, 15 October
Clear. High 50°, low 37°.
0Chapman, Friday, 16 October
Clear. High 66°, low 38°.
0
Chapman, Saturday, 17 October
Mostly clear. High 69°, low 49°.
0Chapman, Sunday, 18 October
Mostly clear. High 63°, low 51°.
0
Chapman, Monday, 19 October
Overcast. High 61°, low 47°.
0.01
Chapman, Tuesday, 20 October
Light rain. High 58°, low 47°.
0Chapman, Wednesday, 21 October
Clear. High 52°, low 43°.
0Chapman, Thursday, 22 October
Partly cloudy. High 44°, low 36°.
0.02Chapman, Friday, 23 October
Light snow. High 36°, low 32°.
0Chapman, Saturday, 24 October
Mostly clear. High 49°, low 29°.
0Chapman, Sunday, 25 October
Overcast. High 47°, low 33°.
0Chapman, Monday, 26 October
Overcast. High 33°, low 24°.
0.03Chapman, Tuesday, 27 October
Climate normal for this date — 60-year average.
0.02Chapman, Wednesday, 28 October
Climate normal for this date — 60-year average.
0.03Chapman, Thursday, 29 October
Climate normal for this date — 60-year average.
0.02Chapman, Friday, 30 October
Climate normal for this date — 60-year average.
0.03Chapman, Saturday, 31 October
Climate normal for this date — 60-year average.
0.01Chapman, Sunday, 1 November
Climate normal for this date — 60-year average.
0.02Chapman, Monday, 2 November
Climate normal for this date — 60-year average.
0.03Chapman, Tuesday, 3 November
Climate normal for this date — 60-year average.
0.02Chapman, Wednesday, 4 November
Climate normal for this date — 60-year average.
0.03Chapman, Thursday, 5 November
Climate normal for this date — 60-year average.
0.02Chapman, Friday, 6 November
Climate normal for this date — 60-year average.
0.02Chapman, Saturday, 7 November
Climate normal for this date — 60-year average.
0.04Chapman, Sunday, 8 November
Climate normal for this date — 60-year average.
0.05Chapman, Monday, 9 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 Chapman, 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 Chapman, 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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