Weather in Sweet Grass, MT
Sweet Grass, Thursday, 15 October, 04:44
Partly cloudy. Feels like 31°. High 51°, low 36°.
Monthly outlook for Sweet Grass, MT: average high 53.2°, average low 37.9°. That is 0.6° above the climate normal for October. Precipitation is expected on 2 days (about 0.2 inches), against a normal of 3 days and 0.4 inches. The warmest day looks like 17 October (68.1°), the coolest 24 October (31.6°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 15 October – 24 October | 55.3° | 54.2° | +0.6° |
| 25 October – 3 November | 49.7° | 47.6° | +1.2° |
| 4 November – 13 November | at normal | 42° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Sunburst (8 mi).
0
Sweet Grass, Friday, 16 October
Overcast. High 66°, low 35°.
0Sweet Grass, Saturday, 17 October
Overcast. High 68°, low 48°.
0
Sweet Grass, Sunday, 18 October
Clear. High 56°, low 38°.
0
Sweet Grass, Monday, 19 October
Partly cloudy. High 60°, low 39°.
0Sweet Grass, Tuesday, 20 October
Partly cloudy. High 56°, low 40°.
0Sweet Grass, Wednesday, 21 October
Overcast. High 54°, low 38°.
0Sweet Grass, Thursday, 22 October
Overcast. High 55°, low 45°.
0.09
Sweet Grass, Friday, 23 October
Snow. High 42°, low 35°.
0Sweet Grass, Saturday, 24 October
Partly cloudy. High 44°, low 32°.
0.11
Sweet Grass, Sunday, 25 October
Light rain. High 47°, low 34°.
0Sweet Grass, Monday, 26 October
Overcast. High 49°, low 36°.
0Sweet Grass, Tuesday, 27 October
Overcast. High 50°, low 38°.
0Sweet Grass, Wednesday, 28 October
Overcast. High 54°, low 41°.
0Sweet Grass, Thursday, 29 October
Overcast. High 45°, low 37°.
0Sweet Grass, Friday, 30 October
Overcast. High 53°, low 36°.
0.04Sweet Grass, Saturday, 31 October
Climate normal for this date — 60-year average.
0.02Sweet Grass, Sunday, 1 November
Climate normal for this date — 60-year average.
0.04Sweet Grass, Monday, 2 November
Climate normal for this date — 60-year average.
0.02Sweet Grass, Tuesday, 3 November
Climate normal for this date — 60-year average.
0.04Sweet Grass, Wednesday, 4 November
Climate normal for this date — 60-year average.
0.04Sweet Grass, Thursday, 5 November
Climate normal for this date — 60-year average.
0.02
Sweet Grass, Friday, 6 November
Climate normal for this date — 60-year average.
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.
0.02Sweet 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.
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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