Weather in Summit Valley, MT
Summit Valley, Thursday, 15 October, 23:26
Clear. Feels like 32°. High 49°, low 32°.
Monthly outlook for Summit Valley, MT: average high 53.2°, average low 35.4°. That is 0.7° below the climate normal for October. Precipitation is expected on 3 days (about 1.0 inches), against a normal of 4 days and 0.7 inches. The warmest day looks like 17 October (66.2°), the coolest 27 October (25.4°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 15 October – 24 October | 57.2° | 56.6° | +0.3° |
| 25 October – 3 November | 46.5° | 49.6° | -1.7° |
| 4 November – 13 November | at normal | 44.3° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Cardwell (7 mi).
0
Summit Valley, Friday, 16 October
Partly cloudy. High 60°, low 30°.
0
Summit Valley, Saturday, 17 October
Overcast. High 66°, low 35°.
0
Summit Valley, Sunday, 18 October
Clear. High 61°, low 40°.
0Summit Valley, Monday, 19 October
Overcast. High 63°, low 42°.
0.15
Summit Valley, Tuesday, 20 October
Rain. High 61°, low 45°.
0.03Summit Valley, Wednesday, 21 October
Light rain. High 59°, low 41°.
0.03Summit Valley, Thursday, 22 October
Light rain. High 63°, low 48°.
0.56
Summit Valley, Friday, 23 October
Snow. High 48°, low 35°.
0.01Summit Valley, Saturday, 24 October
Light snow. High 42°, low 31°.
0Summit Valley, Sunday, 25 October
Partly cloudy. High 47°, low 29°.
0.21Summit Valley, Monday, 26 October
Snow. High 38°, low 31°.
0
Summit Valley, Tuesday, 27 October
Mostly clear. High 43°, low 25°.
0.02Summit Valley, Wednesday, 28 October
Light rain. High 50°, low 36°.
0Summit Valley, Thursday, 29 October
Overcast. High 49°, low 32°.
0.02Summit Valley, Friday, 30 October
Light rain. High 52°, low 37°.
0.05Summit Valley, Saturday, 31 October
Climate normal for this date — 60-year average.
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.
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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