Weather in Summit Valley, MT
Summit Valley, Thursday, 15 October, 06:50
Partly cloudy. Feels like 32°. High 46°, low 32°.
Monthly outlook for Summit Valley, MT: average high 56.3°, average low 38.9°. That is 1° above the climate normal for October. Precipitation is expected on 3 days (about 0.3 inches), against a normal of 4 days and 0.7 inches. The warmest day looks like 17 October (66.3°), the coolest 24 October (28.3°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 15 October – 24 October | 55.6° | 56.6° | -0.5° |
| 25 October – 3 November | 57.5° | 49.6° | +4.4° |
| 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 58°, low 30°.
0
Summit Valley, Saturday, 17 October
Overcast. High 66°, low 40°.
0Summit 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
Overcast. High 63°, low 44°.
0.01
Summit Valley, Wednesday, 21 October
Light rain. High 58°, low 44°.
0.19Summit Valley, Thursday, 22 October
Light rain. High 55°, low 46°.
0.1
Summit Valley, Friday, 23 October
Snow. High 44°, low 36°.
0
Summit Valley, Saturday, 24 October
Mostly clear. High 43°, low 28°.
0Summit Valley, Sunday, 25 October
Overcast. High 52°, low 35°.
0.04Summit Valley, Monday, 26 October
Snow. High 50°, low 36°.
0Summit Valley, Tuesday, 27 October
Overcast. High 55°, low 37°.
0Summit Valley, Wednesday, 28 October
Overcast. High 60°, low 45°.
0Summit Valley, Thursday, 29 October
Partly cloudy. High 63°, low 45°.
0Summit Valley, Friday, 30 October
Overcast. High 65°, low 42°.
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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