10-day forecast for Herndon, PA: 36° to 68°, with precipitation expected on 2 days. The table below breaks each day into morning, afternoon, evening and overnight.
68°
Best day: Wednesday, November 4
62° · 0.45 in
Worst day: Thursday, November 5
Tap any day below to see morning, afternoon, evening and overnight.
Sat, 3159° / 39°0
Morning40°feels 38°
Afternoon57°feels 55°
Evening47°feels 47°
Overnight40°feels 37°
59 °
Herndon, Saturday, 31 October
Partly cloudy. High 59°, low 39°.
Pressure30.50 inHg
Wind4 mph N
Humidity56%
Visibility6.2 mi
Dew point38°
Sun, 0160° / 37°0
Morning39°feels 39°
Afternoon59°feels 57°
Evening50°feels 49°
Overnight37°feels 37°
60 °
Herndon, Sunday, 1 November
Overcast. High 60°, low 37°.
Pressure30.53 inHg
Wind1.5 mph S
Humidity58%
Visibility6.2 mi
Dew point41°
Mon, 0265° / 43°0
Morning45°feels 45°
Afternoon64°feels 62°
Evening55°feels 53°
Overnight45°feels 43°
65 °
Herndon, Monday, 2 November
Overcast. High 65°, low 43°.
Pressure30.39 inHg
Wind3.4 mph S
Humidity62%
Visibility6.2 mi
Dew point46°
Tue, 0367° / 45°0
Morning45°feels 45°
Afternoon67°feels 66°
Evening64°feels 62°
Overnight48°feels 47°
67 °
Herndon, Tuesday, 3 November
Overcast. High 67°, low 45°.
Pressure30.27 inHg
Wind5.7 mph S
Humidity57%
Visibility6.2 mi
Dew point46°
Wed, 0468° / 49°0
Morning53°feels 53°
Afternoon61°feels 60°
Evening67°feels 67°
Overnight59°feels 59°
68 °
Herndon, Wednesday, 4 November
Overcast. High 68°, low 49°.
Pressure30.12 inHg
Wind11.7 mph S
Humidity80%
Visibility—
Dew point52°
Thu, 0562° / 60°0.45
Morning61°feels 61°
Afternoon61°feels 62°
Evening62°feels 62°
Overnight61°feels 61°
62 °
Herndon, Thursday, 5 November
Rain. High 62°, low 60°.
Pressure29.80 inHg
Wind11.1 mph E
Humidity95%
Visibility—
Dew point60°
Fri, 0662° / 54°0.35
Morning60°feels 61°
Afternoon61°feels 62°
Evening60°feels 60°
Overnight55°feels 54°
62 °
Herndon, Friday, 6 November
Light rain. High 62°, low 54°.
Pressure29.41 inHg
Wind14.9 mph N
Humidity96%
Visibility—
Dew point60°
Sat, 0752° / 38°0
Morning50°feels 48°
Afternoon49°feels 44°
Evening46°feels 40°
Overnight41°feels 35°
52 °
Herndon, Saturday, 7 November
Overcast. High 52°, low 38°.
Pressure29.74 inHg
Wind14.5 mph N
Humidity81%
Visibility—
Dew point44°
Sun, 0849° / 36°0
Morning38°feels 30°
Afternoon44°feels 37°
Evening45°feels 40°
Overnight36°feels 30°
49 °
Herndon, Sunday, 8 November
Partly cloudy. High 49°, low 36°.
Pressure30.15 inHg
Wind15.7 mph N
Humidity61%
Visibility—
Dew point29°
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.