Weather in Chelsea, MT
Chelsea, Thursday, 29 October, 22:40
Clear. Feels like 24°. High 43°, low 27°.
Monthly outlook for Chelsea, MT: average high 48.8°, average low 35.9°. That is 2.4° above the climate normal for October. Precipitation is expected on 4 days (about 1.1 inches), against a normal of 3 days and 0.4 inches. The warmest day looks like 8 November (56.4°), the coolest 30 October (25.8°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 29 October – 7 November | 48.7° | 46.9° | +1° |
| 8 November – 17 November | 49.1° | 40.5° | +4.7° |
| 18 November – 27 November | at normal | 35.1° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Poplar (7 mi).
0
Chelsea, Friday, 30 October
Overcast. High 46°, low 26°.
0.25
Chelsea, Saturday, 31 October
Rain. High 48°, low 36°.
0.04Chelsea, Sunday, 1 November
Light rain. High 51°, low 43°.
0.73Chelsea, Monday, 2 November
Rain. High 44°, low 39°.
0
Chelsea, Tuesday, 3 November
Clear. High 49°, low 35°.
0
Chelsea, Wednesday, 4 November
Partly cloudy. High 50°, low 32°.
0Chelsea, Thursday, 5 November
Overcast. High 49°, low 36°.
0Chelsea, Friday, 6 November
Clear. High 51°, low 36°.
0Chelsea, Saturday, 7 November
Clear. High 55°, low 39°.
0Chelsea, Sunday, 8 November
Clear. High 56°, low 40°.
0Chelsea, Monday, 9 November
Clear. High 53°, low 40°.
0Chelsea, Tuesday, 10 November
Overcast. High 55°, low 39°.
0.1Chelsea, Wednesday, 11 November
Light rain. High 46°, low 39°.
0Chelsea, Thursday, 12 November
Clear. High 44°, low 36°.
0.02
Chelsea, Friday, 13 November
Light snow. High 40°, low 30°.
0.03
Chelsea, Saturday, 14 November
Climate normal for this date — 60-year average.
0.02Chelsea, Sunday, 15 November
Climate normal for this date — 60-year average.
0.02Chelsea, Monday, 16 November
Climate normal for this date — 60-year average.
0.02Chelsea, Tuesday, 17 November
Climate normal for this date — 60-year average.
0.03Chelsea, Wednesday, 18 November
Climate normal for this date — 60-year average.
0.02Chelsea, Thursday, 19 November
Climate normal for this date — 60-year average.
0.02Chelsea, Friday, 20 November
Climate normal for this date — 60-year average.
0.01Chelsea, Saturday, 21 November
Climate normal for this date — 60-year average.
0.02Chelsea, Sunday, 22 November
Climate normal for this date — 60-year average.
0.02Chelsea, Monday, 23 November
Climate normal for this date — 60-year average.
0.02Chelsea, Tuesday, 24 November
Climate normal for this date — 60-year average.
0.03Chelsea, Wednesday, 25 November
Climate normal for this date — 60-year average.
0.02Chelsea, Thursday, 26 November
Climate normal for this date — 60-year average.
0.02Chelsea, Friday, 27 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 Chelsea, 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 Chelsea, 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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