10-day forecast for Herndon, PA: 29° to 76°, with precipitation expected on 2 days. The table below breaks each day into morning, afternoon, evening and overnight.
76°
Best day: Wednesday, November 4
76° · 0.43 in
Worst day: Thursday, November 5
Tap any day below to see morning, afternoon, evening and overnight.
Thu, 0576° / 56°0.43
Morning63°feels 63°
Afternoon74°feels 74°
Evening61°feels 61°
Overnight57°feels 57°
76 °
Herndon, Thursday, 5 November
Rain. High 76°, low 56°.
Pressure29.83 inHg
Wind11.5 mph SW
Humidity76%
Visibility4.8 mi
Dew point62°
Fri, 0666° / 51°0
Morning54°feels 53°
Afternoon66°feels 65°
Evening54°feels 52°
Overnight51°feels 51°
66 °
Herndon, Friday, 6 November
Mostly clear. High 66°, low 51°.
Pressure29.91 inHg
Wind5.5 mph W
Humidity53%
Visibility6.2 mi
Dew point48°
Sat, 0755° / 45°0.13
Morning47°feels 43°
Afternoon54°feels 51°
Evening46°feels 41°
Overnight52°feels 51°
55 °
Herndon, Saturday, 7 November
Light rain. High 55°, low 45°.
Pressure29.94 inHg
Wind8.3 mph NW
Humidity47%
Visibility6.2 mi
Dew point34°
Sun, 0855° / 46°0.02
Morning49°feels 45°
Afternoon52°feels 49°
Evening53°feels 51°
Overnight47°feels 42°
55 °
Herndon, Sunday, 8 November
Light rain. High 55°, low 46°.
Pressure30.00 inHg
Wind10.9 mph NW
Humidity55%
Visibility—
Dew point35°
Mon, 0951° / 44°0
Morning48°feels 44°
Afternoon51°feels 48°
Evening50°feels 47°
Overnight45°feels 41°
51 °
Herndon, Monday, 9 November
Overcast. High 51°, low 44°.
Pressure29.91 inHg
Wind19.4 mph NW
Humidity50%
Visibility—
Dew point32°
Tue, 1061° / 38°0
Morning44°feels 43°
Afternoon53°feels 51°
Evening54°feels 52°
Overnight46°feels 45°
61 °
Herndon, Tuesday, 10 November
Clear. High 61°, low 38°.
Pressure30.12 inHg
Wind7 mph W
Humidity48%
Visibility—
Dew point32°
Wed, 1157° / 39°0
Morning45°feels 44°
Afternoon52°feels 50°
Evening50°feels 47°
Overnight39°feels 33°
57 °
Herndon, Wednesday, 11 November
Clear. High 57°, low 39°.
Pressure30.03 inHg
Wind12.3 mph N
Humidity63%
Visibility—
Dew point38°
Thu, 1247° / 29°0
Morning35°feels 31°
Afternoon42°feels 38°
Evening44°feels 42°
Overnight36°feels 32°
47 °
Herndon, Thursday, 12 November
Clear. High 47°, low 29°.
Pressure30.06 inHg
Wind9.4 mph N
Humidity49%
Visibility—
Dew point22°
Fri, 1349° / 36°0.02
Morning40°feels 36°
Afternoon46°feels 41°
Evening47°feels 42°
Overnight40°feels 36°
49 °
Herndon, Friday, 13 November
Light rain. High 49°, low 36°.
Pressure29.74 inHg
Wind12.2 mph W
Humidity64%
Visibility—
Dew point33°
About this forecast
How reliable is a 10-day forecast?
The first 3–5 days are the most reliable, typically within 2–4°. From day six to ten the models show the trend: the direction of change is right more often than the exact numbers.
What does the time-of-day table show?
Temperature in Herndon, PA around 8am, 2pm, 8pm and 2am each day — handy for planning a walk, a drive or work outdoors.
How is the best day chosen?
We weigh the daytime high against precipitation: a warm, dry day scores highest.