Weather in Sweet Grass, MT
Sweet Grass, Thursday, 22 October, 22:02
Clear. Feels like 50°. High 70°, low 38°.
Monthly outlook for Sweet Grass, MT: average high 39.5°, average low 25.5°. That is 4.7° below the climate normal for October. Precipitation is expected on 5 days (about 1.3 inches), against a normal of 3 days and 0.5 inches. The warmest day looks like 22 October (70.1°), the coolest 24 October (16.8°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 22 October – 31 October | 41.2° | 49.5° | -4.6° |
| 1 November – 10 November | 36.7° | 43.6° | -3.8° |
| 11 November – 20 November | at normal | 39.8° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Sunburst (8 mi).
0.27
Sweet Grass, Friday, 23 October
Snow. High 48°, low 23°.
0
Sweet Grass, Saturday, 24 October
Partly cloudy. High 42°, low 17°.
0
Sweet Grass, Sunday, 25 October
Overcast. High 40°, low 25°.
0Sweet Grass, Monday, 26 October
Overcast. High 43°, low 27°.
0.01
Sweet Grass, Tuesday, 27 October
Light rain. High 38°, low 35°.
0.08Sweet Grass, Wednesday, 28 October
Snow. High 36°, low 24°.
0Sweet Grass, Thursday, 29 October
Light snow. High 29°, low 20°.
0.06Sweet Grass, Friday, 30 October
Light snow. High 32°, low 23°.
0.78Sweet Grass, Saturday, 31 October
Snow. High 32°, low 29°.
0.06Sweet Grass, Sunday, 1 November
Light snow. High 34°, low 19°.
0
Sweet Grass, Monday, 2 November
Clear. High 33°, low 17°.
0Sweet Grass, Tuesday, 3 November
Partly cloudy. High 34°, low 20°.
0Sweet Grass, Wednesday, 4 November
Overcast. High 37°, low 25°.
0Sweet Grass, Thursday, 5 November
Clear. High 38°, low 32°.
0Sweet Grass, Friday, 6 November
Clear. High 43°, low 33°.
0.03Sweet Grass, Saturday, 7 November
Climate normal for this date — 60-year average.
0.04Sweet Grass, Sunday, 8 November
Climate normal for this date — 60-year average.
0.06Sweet Grass, Monday, 9 November
Climate normal for this date — 60-year average.
0.03Sweet Grass, Tuesday, 10 November
Climate normal for this date — 60-year average.
0.02Sweet Grass, Wednesday, 11 November
Climate normal for this date — 60-year average.
0.02
Sweet Grass, Thursday, 12 November
Climate normal for this date — 60-year average.
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.
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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