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As of 21:05 EDT

Weather in Herndon, WV

74°Current weather

Herndon, Saturday, 8 August, 21:05

Overcast. Feels like 75°. High 81°, low 65°.

Pressure30.18 inHg
Wind3.2 mph SW
Humidity84%
Visibility6.2 mi
Dew point69°
Sun, 0987° / 69°0.11Rain
87 °Rain

Herndon, Sunday, 9 August

Rain. High 87°, low 69°.

Pressure30.15 inHg
Wind3.4 mph W
Humidity73%
Visibility6.2 mi
Dew point68°
Mon, 1088° / 68°0.07Light rain
88 °Light rain

Herndon, Monday, 10 August

Light rain. High 88°, low 68°.

Pressure30.12 inHg
Wind8.2 mph W
Humidity53%
Visibility6.2 mi
Dew point64°
Tue, 1180° / 65°0.5Rain
80 °Rain

Herndon, Tuesday, 11 August

Rain. High 80°, low 65°.

Pressure30.06 inHg
Wind10.4 mph W
Humidity70%
Visibility6.2 mi
Dew point67°
Wed, 1285° / 62°0.63Rain
85 °Rain

Herndon, Wednesday, 12 August

Rain. High 85°, low 62°.

Pressure29.94 inHg
Wind10.1 mph W
Humidity75%
Visibility6.2 mi
Dew point68°
Thu, 1380° / 62°0.05Light rain
80 °Light rain

Herndon, Thursday, 13 August

Light rain. High 80°, low 62°.

Pressure29.97 inHg
Wind9.8 mph W
Humidity53%
Visibility—
Dew point58°
Fri, 1464° / 59°0.5Rain
64 °Rain

Herndon, Friday, 14 August

Rain. High 64°, low 59°.

Pressure30.09 inHg
Wind3.5 mph SE
Humidity99%
Visibility—
Dew point62°
Sat, 1579° / 56°0Partly cloudy
79 °Partly cloudy

Herndon, Saturday, 15 August

Partly cloudy. High 79°, low 56°.

Pressure30.21 inHg
Wind6.8 mph NW
Humidity31%
Visibility—
Dew point43°
Sun, 1678° / 60°0Overcast
78 °Overcast

Herndon, Sunday, 16 August

Overcast. High 78°, low 60°.

Pressure30.15 inHg
Wind4.3 mph NW
Humidity44%
Visibility—
Dew point52°
Mon, 1780° / 65°0.43Rain
80 °Rain

Herndon, Monday, 17 August

Rain. High 80°, low 65°.

Pressure30.06 inHg
Wind5.9 mph SW
Humidity81%
Visibility—
Dew point67°
Tue, 1882° / 64°0.06Light rain
82 °Light rain

Herndon, Tuesday, 18 August

Light rain. High 82°, low 64°.

Pressure30.00 inHg
Wind8.1 mph W
Humidity53%
Visibility—
Dew point59°
Wed, 1985° / 62°0Clear
85 °Clear

Herndon, Wednesday, 19 August

Clear. High 85°, low 62°.

Pressure29.88 inHg
Wind8.5 mph NW
Humidity44%
Visibility—
Dew point58°
Thu, 2074° / 53°0.1Light rain
74 °Light rain

Herndon, Thursday, 20 August

Light rain. High 74°, low 53°.

Pressure29.88 inHg
Wind11.6 mph NW
Humidity43%
Visibility—
Dew point48°
Fri, 2175° / 52°0Partly cloudy
75 °Partly cloudy

Herndon, Friday, 21 August

Partly cloudy. High 75°, low 52°.

Pressure30.00 inHg
Wind7.2 mph NW
Humidity42%
Visibility—
Dew point47°
Sat, 2281° / 55°0.02Light rain
81 °Light rain

Herndon, Saturday, 22 August

Light rain. High 81°, low 55°.

Pressure30.00 inHg
Wind7.4 mph SW
Humidity43%
Visibility—
Dew point53°
Sun, 2384° / 64°0.21Light rain
84 °Light rain

Herndon, Sunday, 23 August

Light rain. High 84°, low 64°.

Pressure30.03 inHg
Wind11.7 mph W
Humidity56%
Visibility—
Dew point63°

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.