Weather in Summit Valley, MT
Summit Valley, Friday, 16 October, 08:05
Mostly clear. Feels like 28°. High 63°, low 28°.
Monthly outlook for Summit Valley, MT: average high 54.9°, average low 36.7°. That is 0.5° above the climate normal for October. Precipitation is expected on 2 days (about 1.0 inches), against a normal of 4 days and 0.7 inches. The warmest day looks like 22 October (66.5°), the coolest 16 October (28.4°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 16 October – 25 October | 58.1° | 56.4° | +1° |
| 26 October – 4 November | 49.7° | 49° | +0.3° |
| 5 November – 14 November | at normal | 43.7° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Cardwell (7 mi).
0
Summit Valley, Saturday, 17 October
Overcast. High 66°, low 35°.
0
Summit Valley, Sunday, 18 October
Partly cloudy. High 60°, low 42°.
0Summit Valley, Monday, 19 October
Partly cloudy. High 62°, low 43°.
0Summit Valley, Tuesday, 20 October
Partly cloudy. High 63°, low 43°.
0
Summit Valley, Wednesday, 21 October
Clear. High 62°, low 40°.
0
Summit Valley, Thursday, 22 October
Light rain. High 66°, low 48°.
0.94
Summit Valley, Friday, 23 October
Snow. High 53°, low 36°.
0.04Summit Valley, Saturday, 24 October
Light snow. High 39°, low 32°.
0Summit Valley, Sunday, 25 October
Clear. High 45°, low 29°.
0Summit Valley, Monday, 26 October
Partly cloudy. High 48°, low 32°.
0Summit Valley, Tuesday, 27 October
Partly cloudy. High 53°, low 36°.
0.01Summit Valley, Wednesday, 28 October
Light rain. High 54°, low 39°.
0.02Summit Valley, Thursday, 29 October
Snow. High 47°, low 39°.
0Summit Valley, Friday, 30 October
Partly cloudy. High 45°, low 32°.
0Summit Valley, Saturday, 31 October
Partly cloudy. High 50°, low 33°.
0.04Summit Valley, Sunday, 1 November
Climate normal for this date — 60-year average.
0.03Summit Valley, Monday, 2 November
Climate normal for this date — 60-year average.
0.04Summit Valley, Tuesday, 3 November
Climate normal for this date — 60-year average.
0.04Summit Valley, Wednesday, 4 November
Climate normal for this date — 60-year average.
0.04Summit Valley, Thursday, 5 November
Climate normal for this date — 60-year average.
0.04Summit Valley, Friday, 6 November
Climate normal for this date — 60-year average.
0.04Summit Valley, Saturday, 7 November
Climate normal for this date — 60-year average.
0.07
Summit Valley, Sunday, 8 November
Climate normal for this date — 60-year average.
0.04Summit Valley, Monday, 9 November
Climate normal for this date — 60-year average.
0.04Summit Valley, Tuesday, 10 November
Climate normal for this date — 60-year average.
0.03Summit Valley, Wednesday, 11 November
Climate normal for this date — 60-year average.
0.04Summit Valley, Thursday, 12 November
Climate normal for this date — 60-year average.
0.03Summit Valley, Friday, 13 November
Climate normal for this date — 60-year average.
0.03Summit Valley, Saturday, 14 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 Valley, 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 Valley, 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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