Weather in Summit Valley, MT
Summit Valley, Sunday, 11 October, 01:13
Light rain. Feels like 36°. High 36°, low 30°.
Monthly outlook for Summit Valley, MT: average high 56.2°, average low 39.7°. That is 0.1° below the climate normal for October. Precipitation is expected on 2 days (about 1.2 inches), against a normal of 4 days and 0.8 inches. The warmest day looks like 19 October (69.4°), the coolest 13 October (23.5°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 11 October – 20 October | 51.4° | 57.3° | -3.3° |
| 21 October – 30 October | 64.2° | 52.8° | +6.3° |
| 31 October – 9 November | at normal | 46.4° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Cardwell (7 mi).
0.07
Summit Valley, Monday, 12 October
Snow. High 36°, low 24°.
0
Summit Valley, Tuesday, 13 October
Mostly clear. High 36°, low 24°.
0
Summit Valley, Wednesday, 14 October
Clear. High 41°, low 26°.
0Summit Valley, Thursday, 15 October
Clear. High 47°, low 34°.
0
Summit Valley, Friday, 16 October
Partly cloudy. High 53°, low 35°.
0
Summit Valley, Saturday, 17 October
Overcast. High 65°, low 41°.
0Summit Valley, Sunday, 18 October
Overcast. High 68°, low 48°.
0Summit Valley, Monday, 19 October
Partly cloudy. High 69°, low 50°.
0Summit Valley, Tuesday, 20 October
Partly cloudy. High 62°, low 49°.
0Summit Valley, Wednesday, 21 October
Overcast. High 59°, low 42°.
0Summit Valley, Thursday, 22 October
Partly cloudy. High 64°, low 43°.
0Summit Valley, Friday, 23 October
Mostly clear. High 66°, low 46°.
0Summit Valley, Saturday, 24 October
Clear. High 67°, low 47°.
0Summit Valley, Sunday, 25 October
Overcast. High 67°, low 50°.
0Summit Valley, Monday, 26 October
Mostly clear. High 62°, low 47°.
0.03Summit Valley, Tuesday, 27 October
Climate normal for this date — 60-year average.
0.06
Summit Valley, Wednesday, 28 October
Climate normal for this date — 60-year average.
0.06Summit Valley, Thursday, 29 October
Climate normal for this date — 60-year average.
0.04Summit Valley, Friday, 30 October
Climate normal for this date — 60-year average.
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.
0.07Summit 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.
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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