Weather in Sweet Grass, MT
Sweet Grass, Wednesday, 28 October, 02:17
Overcast. Feels like 27°. High 45°, low 30°.
Monthly outlook for Sweet Grass, MT: average high 44.7°, average low 32.4°. That is 0.4° above the climate normal for October. Precipitation is expected on 2 days (about 0.2 inches), against a normal of 3 days and 0.5 inches. The warmest day looks like 31 October (51.4°), the coolest 30 October (27.7°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 28 October – 6 November | 44.4° | 45.9° | -0.8° |
| 7 November – 16 November | 45.2° | 41.2° | +2.2° |
| 17 November – 26 November | at normal | 36.1° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Sunburst (8 mi).
0Sweet Grass, Thursday, 29 October
Overcast. High 39°, low 28°.
0Sweet Grass, Friday, 30 October
Overcast. High 38°, low 28°.
0Sweet Grass, Saturday, 31 October
Overcast. High 51°, low 31°.
0.17
Sweet Grass, Sunday, 1 November
Light rain. High 39°, low 33°.
0
Sweet Grass, Monday, 2 November
Clear. High 47°, low 31°.
0Sweet Grass, Tuesday, 3 November
Clear. High 46°, low 32°.
0Sweet Grass, Wednesday, 4 November
Clear. High 45°, low 34°.
0Sweet Grass, Thursday, 5 November
Clear. High 47°, low 33°.
0
Sweet Grass, Friday, 6 November
Partly cloudy. High 47°, low 34°.
0
Sweet Grass, Saturday, 7 November
Mostly clear. High 48°, low 34°.
0Sweet Grass, Sunday, 8 November
Light rain. High 44°, low 35°.
0.06
Sweet Grass, Monday, 9 November
Light snow. High 34°, low 29°.
0Sweet Grass, Tuesday, 10 November
Clear. High 46°, low 29°.
0Sweet Grass, Wednesday, 11 November
Partly cloudy. High 51°, low 36°.
0Sweet Grass, Thursday, 12 November
Mostly clear. High 49°, low 43°.
0.01Sweet Grass, Friday, 13 November
Climate normal for this date — 60-year average.
0.02Sweet Grass, Saturday, 14 November
Climate normal for this date — 60-year average.
0.01Sweet Grass, Sunday, 15 November
Climate normal for this date — 60-year average.
0.04Sweet Grass, Monday, 16 November
Climate normal for this date — 60-year average.
0.04Sweet Grass, Tuesday, 17 November
Climate normal for this date — 60-year average.
0.03Sweet Grass, Wednesday, 18 November
Climate normal for this date — 60-year average.
0.02Sweet Grass, Thursday, 19 November
Climate normal for this date — 60-year average.
0.02Sweet Grass, Friday, 20 November
Climate normal for this date — 60-year average.
0.02Sweet Grass, Saturday, 21 November
Climate normal for this date — 60-year average.
0.02Sweet Grass, Sunday, 22 November
Climate normal for this date — 60-year average.
0.02Sweet Grass, Monday, 23 November
Climate normal for this date — 60-year average.
0.04Sweet Grass, Tuesday, 24 November
Climate normal for this date — 60-year average.
0.05Sweet Grass, Wednesday, 25 November
Climate normal for this date — 60-year average.
0.04Sweet Grass, Thursday, 26 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 Sweet Grass, 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 Sweet Grass, 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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