Weather in Great Falls, MT
Great Falls, Wednesday, 21 October, 11:01
Mostly clear. Feels like 47°. High 70°, low 35°.
Monthly outlook for Great Falls, MT: average high 52.9°, average low 34.7°. That is 0.5° above the climate normal for October. Precipitation is expected on 4 days (about 1.4 inches), against a normal of 3 days and 0.5 inches. The warmest day looks like 22 October (70.9°), the coolest 24 October (24.9°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 21 October – 30 October | 52.9° | 53.9° | -0.6° |
| 31 October – 9 November | 53° | 47.6° | +3° |
| 10 November – 19 November | at normal | 43.9° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Ulm (12 mi).
0
Great Falls, Thursday, 22 October
Clear. High 71°, low 37°.
1.06
Great Falls, Friday, 23 October
Snow. High 51°, low 34°.
0Great Falls, Saturday, 24 October
Clear. High 39°, low 25°.
0
Great Falls, Sunday, 25 October
Overcast. High 39°, low 25°.
0Great Falls, Monday, 26 October
Mostly clear. High 42°, low 32°.
0Great Falls, Tuesday, 27 October
Overcast. High 46°, low 33°.
0.05Great Falls, Wednesday, 28 October
Snow. High 54°, low 35°.
0Great Falls, Thursday, 29 October
Clear. High 57°, low 35°.
0Great Falls, Friday, 30 October
Clear. High 60°, low 38°.
0.09
Great Falls, Saturday, 31 October
Light rain. High 44°, low 38°.
0Great Falls, Sunday, 1 November
Mostly clear. High 53°, low 31°.
0Great Falls, Monday, 2 November
Overcast. High 56°, low 39°.
0Great Falls, Tuesday, 3 November
Overcast. High 57°, low 36°.
0
Great Falls, Wednesday, 4 November
Partly cloudy. High 57°, low 41°.
0.18Great Falls, Thursday, 5 November
Rain. High 50°, low 40°.
0.04Great Falls, Friday, 6 November
Climate normal for this date — 60-year average.
0.02Great 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.
0.04Great Falls, Wednesday, 18 November
Climate normal for this date — 60-year average.
0.04Great Falls, Thursday, 19 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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