Weather in Great Falls, MT
Great Falls, Tuesday, 20 October, 01:48
Partly cloudy. Feels like 50°. High 60°, low 36°.
Monthly outlook for Great Falls, MT: average high 56.3°, average low 37.8°. That is 2° above the climate normal for October. Precipitation is expected on 1 day (about 0.4 inches), against a normal of 3 days and 0.5 inches. The warmest day looks like 21 October (70.6°), the coolest 27 October (27.5°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 20 October – 29 October | 54.1° | 54.8° | -0.4° |
| 30 October – 8 November | 60° | 48.2° | +6.6° |
| 9 November – 18 November | at normal | 44.2° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Ulm (12 mi).
0
Great Falls, Wednesday, 21 October
Clear. High 71°, low 37°.
0Great Falls, Thursday, 22 October
Clear. High 70°, low 44°.
0.41
Great Falls, Friday, 23 October
Rain. High 53°, low 40°.
0Great Falls, Saturday, 24 October
Clear. High 48°, low 31°.
0
Great Falls, Sunday, 25 October
Mostly clear. High 43°, low 29°.
0
Great Falls, Monday, 26 October
Overcast. High 41°, low 31°.
0Great Falls, Tuesday, 27 October
Clear. High 44°, low 28°.
0Great Falls, Wednesday, 28 October
Clear. High 50°, low 32°.
0Great Falls, Thursday, 29 October
Overcast. High 62°, low 36°.
0Great Falls, Friday, 30 October
Clear. High 58°, low 40°.
0Great Falls, Saturday, 31 October
Overcast. High 60°, low 44°.
0Great Falls, Sunday, 1 November
Clear. High 62°, low 43°.
0Great Falls, Monday, 2 November
Overcast. High 63°, low 43°.
0Great Falls, Tuesday, 3 November
Overcast. High 60°, low 46°.
0
Great Falls, Wednesday, 4 November
Partly cloudy. High 57°, low 46°.
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.
0.02Great 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.
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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