Weather in Herndon, WV
Herndon, Friday, 16 October, 22:11
Overcast. Feels like 53°. High 74°, low 54°.
Monthly outlook for Herndon, WV: average high 63.9°, average low 43.2°. That is 1° above the climate normal for October. Precipitation is expected on 5 days (about 1.4 inches), against a normal of 5 days and 1.9 inches. The warmest day looks like 16 October (73.8°), the coolest 18 October (35.1°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 16 October – 25 October | 65.2° | 62.9° | +1.3° |
| 26 October – 4 November | 61.8° | 60.6° | +0.7° |
| 5 November – 14 November | at normal | 56.1° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Rhodell (7 mi).
0.11
Herndon, Saturday, 17 October
Light rain. High 56°, low 42°.
0
Herndon, Sunday, 18 October
Clear. High 62°, low 35°.
0Herndon, Monday, 19 October
Clear. High 66°, low 37°.
0Herndon, Tuesday, 20 October
Clear. High 69°, low 41°.
0Herndon, Wednesday, 21 October
Clear. High 66°, low 38°.
0Herndon, Thursday, 22 October
Clear. High 64°, low 41°.
0Herndon, Friday, 23 October
Clear. High 64°, low 39°.
0Herndon, Saturday, 24 October
Clear. High 65°, low 41°.
0Herndon, Sunday, 25 October
Clear. High 64°, low 42°.
0Herndon, Monday, 26 October
Overcast. High 63°, low 45°.
0
Herndon, Tuesday, 27 October
Partly cloudy. High 68°, low 49°.
0.23Herndon, Wednesday, 28 October
Light rain. High 68°, low 51°.
0.03Herndon, Thursday, 29 October
Light rain. High 60°, low 47°.
0.54Herndon, Friday, 30 October
Rain. High 56°, low 47°.
0.28Herndon, Saturday, 31 October
Light rain. High 54°, low 41°.
0.08
Herndon, Sunday, 1 November
Climate normal for this date — 60-year average.
0.13Herndon, Monday, 2 November
Climate normal for this date — 60-year average.
0.09Herndon, Tuesday, 3 November
Climate normal for this date — 60-year average.
0.11Herndon, Wednesday, 4 November
Climate normal for this date — 60-year average.
0.14Herndon, Thursday, 5 November
Climate normal for this date — 60-year average.
0.07Herndon, Friday, 6 November
Climate normal for this date — 60-year average.
0.1Herndon, Saturday, 7 November
Climate normal for this date — 60-year average.
0.07Herndon, Sunday, 8 November
Climate normal for this date — 60-year average.
0.08Herndon, Monday, 9 November
Climate normal for this date — 60-year average.
0.14Herndon, Tuesday, 10 November
Climate normal for this date — 60-year average.
0.13Herndon, Wednesday, 11 November
Climate normal for this date — 60-year average.
0.16Herndon, Thursday, 12 November
Climate normal for this date — 60-year average.
0.05Herndon, Friday, 13 November
Climate normal for this date — 60-year average.
0.07Herndon, Saturday, 14 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 Herndon, WV 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 Herndon, WV 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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