Weather in Summit Valley, MT
Summit Valley, Monday, 12 October, 16:45
Overcast. Feels like 34°. High 34°, low 26°.
Monthly outlook for Summit Valley, MT: average high 52.3°, average low 36.2°. That is 2° below the climate normal for October. Precipitation is expected on 3 days (about 0.6 inches), against a normal of 4 days and 0.7 inches. The warmest day looks like 19 October (68°), the coolest 13 October (23.6°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 12 October – 21 October | 53.9° | 57.2° | -1.9° |
| 22 October – 31 October | 49.8° | 51.9° | -1.2° |
| 1 November – 10 November | at normal | 45.8° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Cardwell (7 mi).
0
Summit Valley, Tuesday, 13 October
Clear. High 41°, low 24°.
0Summit Valley, Wednesday, 14 October
Clear. High 52°, low 28°.
0Summit Valley, Thursday, 15 October
Clear. High 55°, low 35°.
0Summit Valley, Friday, 16 October
Clear. High 62°, low 38°.
0Summit Valley, Saturday, 17 October
Clear. High 65°, low 39°.
0
Summit Valley, Sunday, 18 October
Partly cloudy. High 60°, low 44°.
0Summit Valley, Monday, 19 October
Partly cloudy. High 68°, low 44°.
0.02
Summit Valley, Tuesday, 20 October
Light rain. High 56°, low 48°.
0.24
Summit Valley, Wednesday, 21 October
Snow. High 47°, low 34°.
0.24Summit Valley, Thursday, 22 October
Light snow. High 39°, low 33°.
0Summit Valley, Friday, 23 October
Clear. High 50°, low 31°.
0Summit Valley, Saturday, 24 October
Overcast. High 55°, low 37°.
0.04Summit Valley, Sunday, 25 October
Light rain. High 52°, low 40°.
0Summit Valley, Monday, 26 October
Overcast. High 52°, low 40°.
0.04Summit Valley, Tuesday, 27 October
Light rain. High 51°, low 38°.
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.
0.04
Summit 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.
0.04Summit Valley, Tuesday, 10 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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