Weather in Great Falls, VA
Great Falls, Wednesday, 21 October, 10:35
Mostly clear. Feels like 55°. High 65°, low 44°.
Monthly outlook for Great Falls, VA: average high 63.8°, average low 48.2°. That is 1° above the climate normal for October. Precipitation is expected on 2 days (about 2.5 inches), against a normal of 4 days and 1.8 inches. The warmest day looks like 29 October (70.1°), the coolest 24 October (40.5°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 21 October – 30 October | 63.7° | 62.7° | +0.5° |
| 31 October – 9 November | 64.1° | 59.8° | +2.4° |
| 10 November – 19 November | at normal | 54.6° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Sugarland Run (4 mi).
0
Great Falls, Thursday, 22 October
Clear. High 67°, low 41°.
0
Great Falls, Friday, 23 October
Partly cloudy. High 61°, low 43°.
0Great Falls, Saturday, 24 October
Clear. High 59°, low 41°.
0Great Falls, Sunday, 25 October
Clear. High 63°, low 42°.
0Great Falls, Monday, 26 October
Clear. High 66°, low 43°.
0Great Falls, Tuesday, 27 October
Mostly clear. High 62°, low 47°.
0
Great Falls, Wednesday, 28 October
Overcast. High 62°, low 51°.
0Great Falls, Thursday, 29 October
Partly cloudy. High 70°, low 50°.
0.03
Great Falls, Friday, 30 October
Light rain. High 61°, low 50°.
0Great Falls, Saturday, 31 October
Clear. High 59°, low 42°.
0Great Falls, Sunday, 1 November
Overcast. High 59°, low 47°.
0Great Falls, Monday, 2 November
Light rain. High 65°, low 58°.
0.68Great Falls, Tuesday, 3 November
Rain. High 68°, low 61°.
1.79Great Falls, Wednesday, 4 November
Heavy rain. High 65°, low 59°.
0Great Falls, Thursday, 5 November
Clear. High 68°, low 53°.
0.07Great Falls, Friday, 6 November
Climate normal for this date — 60-year average.
0.1Great Falls, Saturday, 7 November
Climate normal for this date — 60-year average.
0.16Great Falls, Sunday, 8 November
Climate normal for this date — 60-year average.
0.06Great Falls, Monday, 9 November
Climate normal for this date — 60-year average.
0.13Great Falls, Tuesday, 10 November
Climate normal for this date — 60-year average.
0.18Great Falls, Wednesday, 11 November
Climate normal for this date — 60-year average.
0.21
Great Falls, Thursday, 12 November
Climate normal for this date — 60-year average.
0.09Great Falls, Friday, 13 November
Climate normal for this date — 60-year average.
0.07Great Falls, Saturday, 14 November
Climate normal for this date — 60-year average.
0.09Great Falls, Sunday, 15 November
Climate normal for this date — 60-year average.
0.12Great Falls, Monday, 16 November
Climate normal for this date — 60-year average.
0.08Great Falls, Tuesday, 17 November
Climate normal for this date — 60-year average.
0.06Great Falls, Wednesday, 18 November
Climate normal for this date — 60-year average.
0.1Great 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, VA 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, VA 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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