Weather in Glenallen, MD
Glenallen, Wednesday, 28 October, 23:38
Clear. Feels like 50°. High 66°, low 46°.
Monthly outlook for Glenallen, MD: average high 62.9°, average low 49.4°. That is 2.3° above the climate normal for October. Precipitation is expected on 3 days (about 2.5 inches), against a normal of 4 days and 1.9 inches. The warmest day looks like 30 October (72.8°), the coolest 10 November (43.8°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 28 October – 6 November | 67.9° | 60.2° | +4.3° |
| 7 November – 16 November | 54.5° | 55.3° | -0.4° |
| 17 November – 26 November | at normal | 51.9° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Glenmont (1 mi).
0
Glenallen, Thursday, 29 October
Mostly clear. High 72°, low 47°.
0
Glenallen, Friday, 30 October
Clear. High 73°, low 53°.
0
Glenallen, Saturday, 31 October
Overcast. High 61°, low 46°.
0Glenallen, Sunday, 1 November
Mostly clear. High 64°, low 49°.
0Glenallen, Monday, 2 November
Clear. High 69°, low 48°.
0Glenallen, Tuesday, 3 November
Overcast. High 69°, low 51°.
0.01
Glenallen, Wednesday, 4 November
Light rain. High 68°, low 56°.
0.74Glenallen, Thursday, 5 November
Heavy rain. High 69°, low 61°.
1.61Glenallen, Friday, 6 November
Heavy rain. High 68°, low 61°.
0Glenallen, Saturday, 7 November
Overcast. High 59°, low 48°.
0Glenallen, Sunday, 8 November
Overcast. High 48°, low 45°.
0Glenallen, Monday, 9 November
Overcast. High 52°, low 45°.
0.01Glenallen, Tuesday, 10 November
Light rain. High 58°, low 44°.
0Glenallen, Wednesday, 11 November
Clear. High 56°, low 45°.
0.13Glenallen, Thursday, 12 November
Light rain. High 56°, low 47°.
0.1
Glenallen, Friday, 13 November
Climate normal for this date — 60-year average.
0.07Glenallen, Saturday, 14 November
Climate normal for this date — 60-year average.
0.09
Glenallen, Sunday, 15 November
Climate normal for this date — 60-year average.
0.12Glenallen, Monday, 16 November
Climate normal for this date — 60-year average.
0.08Glenallen, Tuesday, 17 November
Climate normal for this date — 60-year average.
0.06Glenallen, Wednesday, 18 November
Climate normal for this date — 60-year average.
0.11Glenallen, Thursday, 19 November
Climate normal for this date — 60-year average.
0.07Glenallen, Friday, 20 November
Climate normal for this date — 60-year average.
0.09Glenallen, Saturday, 21 November
Climate normal for this date — 60-year average.
0.11Glenallen, Sunday, 22 November
Climate normal for this date — 60-year average.
0.06Glenallen, Monday, 23 November
Climate normal for this date — 60-year average.
0.13Glenallen, Tuesday, 24 November
Climate normal for this date — 60-year average.
0.09Glenallen, Wednesday, 25 November
Climate normal for this date — 60-year average.
0.13Glenallen, Thursday, 26 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 Glenallen, 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 Glenallen, 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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