Weather in Summit, MT
Summit, Wednesday, 7 October, 15:34
Clear. Feels like 68°. High 70°, low 29°.
Monthly outlook for Summit, MT: average high 44.2°, average low 23.4°. That is 1.6° below the climate normal for October. Precipitation is expected on 5 days (about 1.0 inches), against a normal of 4 days and 0.8 inches. The warmest day looks like 7 October (70.4°), the coolest 16 October (6.5°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 7 October – 16 October | 45.5° | 47.6° | -1.1° |
| 17 October – 26 October | 41.8° | 44.8° | -1.7° |
| 27 October – 5 November | at normal | 38.4° | — |
October records over 66 years
0Summit, Thursday, 8 October
Clear. High 67°, low 31°.
0
Summit, Friday, 9 October
Mostly clear. High 70°, low 31°.
0.18
Summit, Saturday, 10 October
Snow. High 50°, low 29°.
0.49Summit, Sunday, 11 October
Snow. High 27°, low 24°.
0.04Summit, Monday, 12 October
Light snow. High 30°, low 23°.
0.03
Summit, Tuesday, 13 October
Light rain. High 51°, low 22°.
0
Summit, Wednesday, 14 October
Partly cloudy. High 37°, low 26°.
0.04Summit, Thursday, 15 October
Light snow. High 24°, low 12°.
0Summit, Friday, 16 October
Mostly clear. High 29°, low 7°.
0.01Summit, Saturday, 17 October
Light snow. High 40°, low 12°.
0.21Summit, Sunday, 18 October
Snow. High 32°, low 27°.
0Summit, Monday, 19 October
Partly cloudy. High 43°, low 22°.
0
Summit, Tuesday, 20 October
Overcast. High 47°, low 26°.
0Summit, Wednesday, 21 October
Overcast. High 49°, low 28°.
0.02Summit, Thursday, 22 October
Light snow. High 40°, low 27°.
0.06Summit, Friday, 23 October
Climate normal for this date — 60-year average.
0.05Summit, Saturday, 24 October
Climate normal for this date — 60-year average.
0.06Summit, Sunday, 25 October
Climate normal for this date — 60-year average.
0.08
Summit, Monday, 26 October
Climate normal for this date — 60-year average.
0.04Summit, Tuesday, 27 October
Climate normal for this date — 60-year average.
0.07Summit, Wednesday, 28 October
Climate normal for this date — 60-year average.
0.06Summit, Thursday, 29 October
Climate normal for this date — 60-year average.
0.05Summit, Friday, 30 October
Climate normal for this date — 60-year average.
0.05Summit, Saturday, 31 October
Climate normal for this date — 60-year average.
0.04Summit, Sunday, 1 November
Climate normal for this date — 60-year average.
0.04Summit, Monday, 2 November
Climate normal for this date — 60-year average.
0.04Summit, Tuesday, 3 November
Climate normal for this date — 60-year average.
0.04Summit, Wednesday, 4 November
Climate normal for this date — 60-year average.
0.06Summit, Thursday, 5 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 Summit, 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 Summit, 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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