Weather in Great Falls, MD
Great Falls, Friday, 30 October, 17:03
Mostly clear. Feels like 70°. High 73°, low 50°.
Monthly outlook for Great Falls, MD: average high 68.2°, average low 54.5°. That is 5.7° above the climate normal for October. Precipitation is expected on 4 days (about 2.0 inches), against a normal of 4 days and 1.7 inches. The warmest day looks like 30 October (73.4°), the coolest 31 October (41.3°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 30 October – 8 November | 67.5° | 59.5° | +4.5° |
| 9 November – 18 November | 69.3° | 54.5° | +8.2° |
| 19 November – 28 November | at normal | 51.9° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Tysons (6 mi).
0
Great Falls, Saturday, 31 October
Overcast. High 63°, low 41°.
0Great Falls, Sunday, 1 November
Mostly clear. High 63°, low 43°.
0
Great Falls, Monday, 2 November
Partly cloudy. High 67°, low 47°.
0Great Falls, Tuesday, 3 November
Overcast. High 68°, low 46°.
0Great Falls, Wednesday, 4 November
Overcast. High 72°, low 51°.
0.12
Great Falls, Thursday, 5 November
Light rain. High 64°, low 61°.
0.06Great Falls, Friday, 6 November
Light rain. High 66°, low 62°.
0Great Falls, Saturday, 7 November
Overcast. High 67°, low 62°.
0Great Falls, Sunday, 8 November
Overcast. High 72°, low 62°.
0.02Great Falls, Monday, 9 November
Light rain. High 71°, low 63°.
0Great Falls, Tuesday, 10 November
Overcast. High 72°, low 57°.
0.24Great Falls, Wednesday, 11 November
Rain. High 71°, low 59°.
0
Great Falls, Thursday, 12 November
Clear. High 70°, low 55°.
0Great Falls, Friday, 13 November
Overcast. High 70°, low 56°.
1.56Great Falls, Saturday, 14 November
Heavy rain. High 63°, low 56°.
0.09Great Falls, Sunday, 15 November
Climate normal for this date — 60-year average.
0.12
Great 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.
0.11Great Falls, Thursday, 19 November
Climate normal for this date — 60-year average.
0.07Great Falls, Friday, 20 November
Climate normal for this date — 60-year average.
0.09Great Falls, Saturday, 21 November
Climate normal for this date — 60-year average.
0.11Great Falls, Sunday, 22 November
Climate normal for this date — 60-year average.
0.06Great Falls, Monday, 23 November
Climate normal for this date — 60-year average.
0.14Great Falls, Tuesday, 24 November
Climate normal for this date — 60-year average.
0.09Great Falls, Wednesday, 25 November
Climate normal for this date — 60-year average.
0.13Great Falls, Thursday, 26 November
Climate normal for this date — 60-year average.
0.09Great Falls, Friday, 27 November
Climate normal for this date — 60-year average.
0.17Great Falls, Saturday, 28 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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