Weather in Big Sky, MT
Big Sky, Sunday, 18 October, 14:27
Clear. Feels like 58°. High 60°, low 29°.
Monthly outlook for Big Sky, MT: average high 44.3°, average low 24.2°. That is 0.4° above the climate normal for October. Precipitation is expected on 6 days (about 1.3 inches), against a normal of 6 days and 1.2 inches. The warmest day looks like 18 October (60.5°), the coolest 30 October (2.5°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 18 October – 27 October | 49.9° | 45.9° | +2.2° |
| 28 October – 6 November | 35° | 39.6° | -2.6° |
| 7 November – 16 November | at normal | 36.2° | — |
October records over 66 years
0
Big Sky, Monday, 19 October
Overcast. High 60°, low 31°.
0.03
Big Sky, Tuesday, 20 October
Light rain. High 51°, low 32°.
0.05Big Sky, Wednesday, 21 October
Light rain. High 53°, low 35°.
0.03Big Sky, Thursday, 22 October
Light rain. High 51°, low 38°.
0.69
Big Sky, Friday, 23 October
Snow. High 37°, low 25°.
0
Big Sky, Saturday, 24 October
Partly cloudy. High 39°, low 14°.
0Big Sky, Sunday, 25 October
Clear. High 45°, low 26°.
0Big Sky, Monday, 26 October
Clear. High 48°, low 26°.
0Big Sky, Tuesday, 27 October
Overcast. High 53°, low 30°.
0.05Big Sky, Wednesday, 28 October
Snow. High 36°, low 26°.
0.35Big Sky, Thursday, 29 October
Snow. High 37°, low 17°.
0.03Big Sky, Friday, 30 October
Light snow. High 24°, low 3°.
0
Big Sky, Saturday, 31 October
Mostly clear. High 36°, low 10°.
0.07Big Sky, Sunday, 1 November
Light snow. High 40°, low 16°.
0.06Big Sky, Monday, 2 November
Light snow. High 37°, low 31°.
0.07Big Sky, Tuesday, 3 November
Climate normal for this date — 60-year average.
0.06
Big Sky, Wednesday, 4 November
Climate normal for this date — 60-year average.
0.09Big Sky, Thursday, 5 November
Climate normal for this date — 60-year average.
0.07Big Sky, Friday, 6 November
Climate normal for this date — 60-year average.
0.08Big Sky, Saturday, 7 November
Climate normal for this date — 60-year average.
0.1Big Sky, Sunday, 8 November
Climate normal for this date — 60-year average.
0.07Big Sky, Monday, 9 November
Climate normal for this date — 60-year average.
0.05Big Sky, Tuesday, 10 November
Climate normal for this date — 60-year average.
0.06Big Sky, Wednesday, 11 November
Climate normal for this date — 60-year average.
0.08Big Sky, Thursday, 12 November
Climate normal for this date — 60-year average.
0.07Big Sky, Friday, 13 November
Climate normal for this date — 60-year average.
0.09Big Sky, Saturday, 14 November
Climate normal for this date — 60-year average.
0.04Big Sky, Sunday, 15 November
Climate normal for this date — 60-year average.
0.07Big Sky, 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 Big Sky, 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 Big Sky, 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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