Weather in Sun River, MT
Sun River, Thursday, 8 October, 15:59
Overcast. Feels like 79°. High 80°, low 41°.
Monthly outlook for Sun River, MT: average high 55.1°, average low 35.1°. That is 1.8° below the climate normal for October. Precipitation is expected on 4 days (about 1.2 inches), against a normal of 3 days and 0.6 inches. The warmest day looks like 8 October (80.4°), the coolest 16 October (18.3°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 8 October – 17 October | 50.7° | 58.9° | -4.5° |
| 18 October – 27 October | 62.4° | 56.2° | +3.4° |
| 28 October – 6 November | at normal | 49.3° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Ulm (12 mi).
0Sun River, Friday, 9 October
Overcast. High 78°, low 49°.
0.46
Sun River, Saturday, 10 October
Snow. High 51°, low 34°.
0.29Sun River, Sunday, 11 October
Light snow. High 34°, low 32°.
0.02Sun River, Monday, 12 October
Snow. High 40°, low 32°.
0
Sun River, Tuesday, 13 October
Partly cloudy. High 52°, low 29°.
0.07Sun River, Wednesday, 14 October
Snow. High 49°, low 34°.
0.32Sun River, Thursday, 15 October
Snow. High 36°, low 24°.
0
Sun River, Friday, 16 October
Clear. High 39°, low 18°.
0Sun River, Saturday, 17 October
Clear. High 49°, low 27°.
0Sun River, Sunday, 18 October
Clear. High 60°, low 35°.
0Sun River, Monday, 19 October
Overcast. High 57°, low 41°.
0Sun River, Tuesday, 20 October
Clear. High 60°, low 39°.
0Sun River, Wednesday, 21 October
Overcast. High 67°, low 41°.
0Sun River, Thursday, 22 October
Clear. High 68°, low 43°.
0Sun River, Friday, 23 October
Overcast. High 63°, low 43°.
0.03
Sun River, Saturday, 24 October
Climate normal for this date — 60-year average.
0.02Sun River, Sunday, 25 October
Climate normal for this date — 60-year average.
0.05Sun River, Monday, 26 October
Climate normal for this date — 60-year average.
0.04Sun River, Tuesday, 27 October
Climate normal for this date — 60-year average.
0.04Sun River, Wednesday, 28 October
Climate normal for this date — 60-year average.
0.04Sun River, Thursday, 29 October
Climate normal for this date — 60-year average.
0.02Sun River, Friday, 30 October
Climate normal for this date — 60-year average.
0.03Sun River, Saturday, 31 October
Climate normal for this date — 60-year average.
0.03Sun River, Sunday, 1 November
Climate normal for this date — 60-year average.
0.02Sun River, Monday, 2 November
Climate normal for this date — 60-year average.
0.03Sun River, Tuesday, 3 November
Climate normal for this date — 60-year average.
0.04Sun River, Wednesday, 4 November
Climate normal for this date — 60-year average.
0.04Sun River, Thursday, 5 November
Climate normal for this date — 60-year average.
0.04Sun River, Friday, 6 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 Sun River, 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 Sun River, 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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