Weather in Great Falls, MT
Great Falls, Sunday, 18 October, 04:09
Partly cloudy. Feels like 45°. High 60°, low 42°.
Monthly outlook for Great Falls, MT: average high 59.4°, average low 41.7°. That is 3° above the climate normal for October. Precipitation is expected on 0 days (about 0.0 inches), against a normal of 3 days and 0.5 inches. The warmest day looks like 22 October (71.7°), the coolest 24 October (34.7°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 18 October – 27 October | 58.9° | 56.2° | +1.5° |
| 28 October – 6 November | 60.2° | 49.3° | +6.1° |
| 7 November – 16 November | at normal | 44.8° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Ulm (12 mi).
0
Great Falls, Monday, 19 October
Overcast. High 70°, low 37°.
0Great Falls, Tuesday, 20 October
Overcast. High 58°, low 39°.
0
Great Falls, Wednesday, 21 October
Clear. High 62°, low 37°.
0Great Falls, Thursday, 22 October
Clear. High 72°, low 48°.
0
Great Falls, Friday, 23 October
Light rain. High 54°, low 44°.
0.01Great Falls, Saturday, 24 October
Light rain. High 46°, low 35°.
0Great Falls, Sunday, 25 October
Overcast. High 64°, low 40°.
0Great Falls, Monday, 26 October
Overcast. High 48°, low 37°.
0.04
Great Falls, Tuesday, 27 October
Snow. High 54°, low 36°.
0Great Falls, Wednesday, 28 October
Overcast. High 61°, low 39°.
0Great Falls, Thursday, 29 October
Overcast. High 63°, low 42°.
0Great Falls, Friday, 30 October
Overcast. High 61°, low 49°.
0Great Falls, Saturday, 31 October
Overcast. High 57°, low 52°.
0Great Falls, Sunday, 1 November
Overcast. High 58°, low 46°.
0Great Falls, Monday, 2 November
Overcast. High 62°, low 45°.
0.03
Great Falls, Tuesday, 3 November
Climate normal for this date — 60-year average.
0.04
Great 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.
0.02Great 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.
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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