Weather in Great Falls, MD
Great Falls, Tuesday, 13 October, 17:29
Clear. Feels like 82°. High 81°, low 55°.
Monthly outlook for Great Falls, MD: average high 70.2°, average low 53.9°. That is 3.5° above the climate normal for October. Precipitation is expected on 3 days (about 1.0 inches), against a normal of 4 days and 1.7 inches. The warmest day looks like 14 October (86.3°), the coolest 18 October (42.1°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 13 October – 22 October | 71.5° | 65° | +3.6° |
| 23 October – 1 November | 68.2° | 61.5° | +3.7° |
| 2 November – 11 November | at normal | 58.3° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Tysons (6 mi).
0.17
Great Falls, Wednesday, 14 October
Rain. High 86°, low 65°.
0.03Great Falls, Thursday, 15 October
Light rain. High 68°, low 58°.
0.11Great Falls, Friday, 16 October
Light rain. High 83°, low 61°.
0.02Great Falls, Saturday, 17 October
Light rain. High 58°, low 46°.
0Great Falls, Sunday, 18 October
Clear. High 58°, low 42°.
0
Great Falls, Monday, 19 October
Overcast. High 67°, low 43°.
0Great Falls, Tuesday, 20 October
Light rain. High 70°, low 55°.
0.01Great Falls, Wednesday, 21 October
Light rain. High 72°, low 57°.
0Great Falls, Thursday, 22 October
Overcast. High 72°, low 57°.
0Great Falls, Friday, 23 October
Overcast. High 74°, low 58°.
0
Great Falls, Saturday, 24 October
Mostly clear. High 76°, low 58°.
0Great Falls, Sunday, 25 October
Overcast. High 61°, low 51°.
0Great Falls, Monday, 26 October
Overcast. High 60°, low 47°.
0.02Great Falls, Tuesday, 27 October
Light rain. High 70°, low 54°.
0.63Great Falls, Wednesday, 28 October
Rain. High 69°, low 55°.
0.22
Great Falls, Thursday, 29 October
Climate normal for this date — 60-year average.
0.11Great Falls, Friday, 30 October
Climate normal for this date — 60-year average.
0.06Great Falls, Saturday, 31 October
Climate normal for this date — 60-year average.
0.09Great Falls, Sunday, 1 November
Climate normal for this date — 60-year average.
0.12Great Falls, Monday, 2 November
Climate normal for this date — 60-year average.
0.06Great Falls, Tuesday, 3 November
Climate normal for this date — 60-year average.
0.11Great Falls, Wednesday, 4 November
Climate normal for this date — 60-year average.
0.09Great Falls, Thursday, 5 November
Climate normal for this date — 60-year average.
0.07Great Falls, Friday, 6 November
Climate normal for this date — 60-year average.
0.09Great 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.
0.19Great Falls, Wednesday, 11 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, MD 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, MD 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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