Weather in Big Sky, MT
Big Sky, Sunday, 18 October, 04:27
Overcast. Feels like 37°. High 59°, low 29°.
Monthly outlook for Big Sky, MT: average high 51.6°, average low 33.4°. That is 4.5° above the climate normal for October. Precipitation is expected on 3 days (about 0.8 inches), against a normal of 6 days and 1.2 inches. The warmest day looks like 19 October (60.4°), the coolest 19 October (24.9°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 18 October – 27 October | 52.3° | 45.9° | +3.5° |
| 28 October – 6 November | 50.6° | 39.6° | +6.1° |
| 7 November – 16 November | at normal | 36.2° | — |
October records over 66 years
0Big Sky, Monday, 19 October
Overcast. High 60°, low 25°.
0.21
Big Sky, Tuesday, 20 October
Rain. High 50°, low 36°.
0.02Big Sky, Wednesday, 21 October
Light rain. High 54°, low 37°.
0.06Big Sky, Thursday, 22 October
Light rain. High 53°, low 38°.
0.51
Big Sky, Friday, 23 October
Snow. High 38°, low 30°.
0Big Sky, Saturday, 24 October
Overcast. High 48°, low 29°.
0
Big Sky, Sunday, 25 October
Partly cloudy. High 55°, low 32°.
0Big Sky, Monday, 26 October
Overcast. High 55°, low 33°.
0
Big Sky, Tuesday, 27 October
Clear. High 51°, low 34°.
0Big Sky, Wednesday, 28 October
Clear. High 51°, low 36°.
0Big Sky, Thursday, 29 October
Overcast. High 52°, low 35°.
0Big Sky, Friday, 30 October
Overcast. High 48°, low 35°.
0Big Sky, Saturday, 31 October
Overcast. High 51°, low 35°.
0Big Sky, Sunday, 1 November
Partly cloudy. High 53°, low 36°.
0.03Big Sky, Monday, 2 November
Light rain. High 48°, low 38°.
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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