Weather in Great Falls, MT
Great Falls, Monday, 19 October, 06:13
Partly cloudy. Feels like 37°. High 68°, low 36°.
Monthly outlook for Great Falls, MT: average high 53.6°, average low 36.2°. That is 0.2° above the climate normal for October. Precipitation is expected on 3 days (about 1.4 inches), against a normal of 3 days and 0.5 inches. The warmest day looks like 22 October (69.9°), the coolest 28 October (25.3°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 19 October – 28 October | 54.2° | 55.6° | -0.8° |
| 29 October – 7 November | 52.7° | 48.7° | +2.2° |
| 8 November – 17 November | at normal | 44.5° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Ulm (12 mi).
0
Great Falls, Tuesday, 20 October
Overcast. High 59°, low 39°.
0
Great Falls, Wednesday, 21 October
Partly cloudy. High 67°, low 38°.
0
Great Falls, Thursday, 22 October
Clear. High 70°, low 45°.
1.08
Great Falls, Friday, 23 October
Rain. High 52°, low 43°.
0.13Great Falls, Saturday, 24 October
Light rain. High 51°, low 40°.
0.01Great Falls, Sunday, 25 October
Light rain. High 59°, low 37°.
0.12
Great Falls, Monday, 26 October
Snow. High 33°, low 29°.
0.02Great Falls, Tuesday, 27 October
Light snow. High 34°, low 27°.
0Great Falls, Wednesday, 28 October
Clear. High 50°, low 25°.
0Great Falls, Thursday, 29 October
Overcast. High 59°, low 32°.
0Great Falls, Friday, 30 October
Overcast. High 61°, low 43°.
0Great Falls, Saturday, 31 October
Clear. High 54°, low 44°.
0Great Falls, Sunday, 1 November
Overcast. High 55°, low 40°.
0Great Falls, Monday, 2 November
Overcast. High 41°, low 33°.
0Great Falls, Tuesday, 3 November
Overcast. High 46°, low 31°.
0.04Great Falls, Wednesday, 4 November
Climate normal for this date — 60-year average.
0.04Great Falls, Thursday, 5 November
Climate normal for this date — 60-year average.
0.04Great Falls, Friday, 6 November
Climate normal for this date — 60-year average.
0.02
Great Falls, Saturday, 7 November
Climate normal for this date — 60-year average.
0.04Great Falls, Sunday, 8 November
Climate normal for this date — 60-year average.
0.05Great Falls, Monday, 9 November
Climate normal for this date — 60-year average.
0.03Great Falls, Tuesday, 10 November
Climate normal for this date — 60-year average.
0.03Great Falls, Wednesday, 11 November
Climate normal for this date — 60-year average.
0.02Great Falls, Thursday, 12 November
Climate normal for this date — 60-year average.
0.02Great Falls, Friday, 13 November
Climate normal for this date — 60-year average.
0.02Great Falls, Saturday, 14 November
Climate normal for this date — 60-year average.
0.01Great Falls, Sunday, 15 November
Climate normal for this date — 60-year average.
0.02Great Falls, Monday, 16 November
Climate normal for this date — 60-year average.
0.04Great Falls, Tuesday, 17 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 Great Falls, 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 Great Falls, 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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