Weather in Summit Valley, MT
Summit Valley, Sunday, 18 October, 23:21
Clear. Feels like 42°. High 62°, low 36°.
Monthly outlook for Summit Valley, MT: average high 52.8°, average low 34.7°. That is 0° above the climate normal for October. Precipitation is expected on 4 days (about 1.9 inches), against a normal of 4 days and 0.7 inches. The warmest day looks like 19 October (67.5°), the coolest 30 October (20.6°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 18 October – 27 October | 58.2° | 55.4° | +1.6° |
| 28 October – 6 November | 43.7° | 48° | -2.3° |
| 7 November – 16 November | at normal | 42.7° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Cardwell (7 mi).
0
Summit Valley, Monday, 19 October
Overcast. High 67°, low 38°.
0Summit Valley, Tuesday, 20 October
Overcast. High 62°, low 40°.
0.01
Summit Valley, Wednesday, 21 October
Light rain. High 64°, low 40°.
0
Summit Valley, Thursday, 22 October
Clear. High 63°, low 45°.
0.91Summit Valley, Friday, 23 October
Rain. High 49°, low 41°.
0Summit Valley, Saturday, 24 October
Clear. High 50°, low 32°.
0.04Summit Valley, Sunday, 25 October
Light rain. High 52°, low 38°.
0Summit Valley, Monday, 26 October
Clear. High 54°, low 33°.
0
Summit Valley, Tuesday, 27 October
Partly cloudy. High 58°, low 36°.
0Summit Valley, Wednesday, 28 October
Overcast. High 62°, low 41°.
0.56
Summit Valley, Thursday, 29 October
Snow. High 39°, low 29°.
0.01Summit Valley, Friday, 30 October
Light snow. High 35°, low 21°.
0Summit Valley, Saturday, 31 October
Partly cloudy. High 39°, low 22°.
0Summit Valley, Sunday, 1 November
Overcast. High 45°, low 32°.
0.35Summit Valley, Monday, 2 November
Snow. High 44°, low 32°.
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.
0.07
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.
0.02Summit Valley, Sunday, 15 November
Climate normal for this date — 60-year average.
0.03Summit Valley, Monday, 16 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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