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As of 22:40 CDT

Weather in Herndon, KY

71°Current weather

Herndon, Saturday, 8 August, 22:40

Overcast. Feels like 73°. High 89°, low 71°.

Pressure30.06 inHg
Wind4 mph SW
Humidity92%
Visibility6.2 mi
Dew point69°
Sun, 0990° / 72°0Light rain
90 °Light rain

Herndon, Sunday, 9 August

Light rain. High 90°, low 72°.

Pressure30.06 inHg
Wind6.9 mph S
Humidity58%
Visibility6.2 mi
Dew point72°
Mon, 1093° / 73°0Clear
93 °Clear

Herndon, Monday, 10 August

Clear. High 93°, low 73°.

Pressure30.06 inHg
Wind9.6 mph W
Humidity53%
Visibility6.2 mi
Dew point71°
Tue, 1194° / 75°0Mostly clear
94 °Mostly clear

Herndon, Tuesday, 11 August

Mostly clear. High 94°, low 75°.

Pressure29.97 inHg
Wind13.1 mph SW
Humidity51%
Visibility6.2 mi
Dew point71°
Wed, 1294° / 71°1.13Heavy rain
94 °Heavy rain

Herndon, Wednesday, 12 August

Heavy rain. High 94°, low 71°.

Pressure29.88 inHg
Wind10.8 mph W
Humidity52%
Visibility6.2 mi
Dew point71°
Thu, 1382° / 69°0.18Light rain
82 °Light rain

Herndon, Thursday, 13 August

Light rain. High 82°, low 69°.

Pressure30.00 inHg
Wind6.6 mph NE
Humidity75%
Visibility—
Dew point71°
Fri, 1491° / 70°0.89Heavy rain
91 °Heavy rain

Herndon, Friday, 14 August

Heavy rain. High 91°, low 70°.

Pressure29.97 inHg
Wind10.4 mph NE
Humidity62%
Visibility—
Dew point71°
Sat, 1572° / 68°0.41Rain
72 °Rain

Herndon, Saturday, 15 August

Rain. High 72°, low 68°.

Pressure30.21 inHg
Wind9.1 mph E
Humidity98%
Visibility—
Dew point69°
Sun, 1694° / 68°0.01Light rain
94 °Light rain

Herndon, Sunday, 16 August

Light rain. High 94°, low 68°.

Pressure30.03 inHg
Wind9.4 mph S
Humidity52%
Visibility—
Dew point69°
Mon, 1789° / 75°0Overcast
89 °Overcast

Herndon, Monday, 17 August

Overcast. High 89°, low 75°.

Pressure30.03 inHg
Wind8.4 mph NW
Humidity65%
Visibility—
Dew point74°
Tue, 1891° / 73°0.3Rain
91 °Rain

Herndon, Tuesday, 18 August

Rain. High 91°, low 73°.

Pressure29.97 inHg
Wind6.5 mph N
Humidity62%
Visibility—
Dew point74°
Wed, 1989° / 71°0Partly cloudy
89 °Partly cloudy

Herndon, Wednesday, 19 August

Partly cloudy. High 89°, low 71°.

Pressure29.91 inHg
Wind5.6 mph NE
Humidity59%
Visibility—
Dew point69°
Thu, 2079° / 66°0Clear
79 °Clear

Herndon, Thursday, 20 August

Clear. High 79°, low 66°.

Pressure29.97 inHg
Wind10.8 mph NE
Humidity53%
Visibility—
Dew point58°
Fri, 2177° / 62°0.11Light rain
77 °Light rain

Herndon, Friday, 21 August

Light rain. High 77°, low 62°.

Pressure30.03 inHg
Wind7.9 mph NE
Humidity63%
Visibility—
Dew point60°
Sat, 2297° / 66°0.14Light rain
97 °Light rain

Herndon, Saturday, 22 August

Light rain. High 97°, low 66°.

Pressure29.88 inHg
Wind15.1 mph NW
Humidity52%
Visibility—
Dew point67°
Sun, 2388° / 73°0Overcast
88 °Overcast

Herndon, Sunday, 23 August

Overcast. High 88°, low 73°.

Pressure29.97 inHg
Wind12.6 mph S
Humidity69%
Visibility—
Dew point69°

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, KY 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, KY 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.