Herndon, PA Weather Forecast
Local 7-day forecast
Partly Cloudy
Track current conditions, temperature changes, wind, and the full daily outlook for Herndon, PA in one place.
Partly cloudy, with a low around 52. North wind around 9 mph.
Local Weather Overview
This forecast page for Herndon, PA is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: Oct 15, 2026 4:45 AM EDT.
The active forecast window currently covers Oct 15 to Oct 21, 2026 for Herndon, PA.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Oct 15 to Oct 21, 2026
- Latest sync
- Oct 15, 2026 4:45 AM EDT
- Forecast office
- CTP
- Source
- NOAA / NWS
Daily Outlook
This Week in Herndon
Friday looks like the warmest upcoming period in Herndon at 75 degrees F.
Saturday Night is the coolest period ahead with temperatures near 31 degrees F.
The strongest winds are forecast for Friday Night at about 10 to 15 mph NW.
Precipitation is mentioned in 3 upcoming forecast periods.
Forecast Details
- Last updated
- Oct 15, 2026 4:45 AM EDT
- Coverage
- 7 days
- Time zone
- America/New_York
- Forecast office
- CTP
- Radar station
- KCCX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Mostly sunny, with a high near 64. Northeast wind 0 to 8 mph.
A chance of rain between 11pm and 2am, then rain likely and a slight chance of thunderstorms. Cloudy, with a low around 55. South wind 3 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 70%. New rainfall amounts less than a tenth of an inch possible.
A chance of rain and a slight chance of thunderstorms before 8am, then a chance of showers and thunderstorms between 2pm and 3pm, then showers and thunderstorms likely. Mostly cloudy, with a high near 75. Southwest wind 8 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch possible.
A chance of showers and thunderstorms before 2am. Mostly cloudy, with a low around 44. Northwest wind 10 to 15 mph, with gusts as high as 31 mph. Chance of precipitation is 30%. New rainfall amounts between a tenth and quarter of an inch possible.
Mostly sunny, with a high near 49.
Widespread frost after 11pm. Mostly clear, with a low around 31.
Widespread frost before 9am. Sunny, with a high near 56.
Areas of frost after 4am. Mostly clear, with a low around 36.
Areas of frost before 9am. Sunny, with a high near 60.
Partly cloudy, with a low around 40.
Mostly sunny, with a high near 63.
Partly cloudy, with a low around 41.
Sunny, with a high near 62.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Overnight
Oct 15
|
Partly Cloudy
|
52°F |
9 mph
N
|
|
Thursday
Oct 15
|
Mostly Sunny
|
64°F |
0 to 8 mph
NE
|
|
Thursday Night
Oct 15
|
Light Rain Likely
|
55°F |
3 to 14 mph
S
|
|
Friday
Oct 16
|
Chance Light Rain then Chance Showers And Thunderstorms
|
75°F |
8 to 14 mph
SW
|
|
Friday Night
Oct 16
|
Chance Showers And Thunderstorms
|
44°F |
10 to 15 mph
NW
|
|
Saturday
Oct 17
|
Mostly Sunny
|
49°F |
8 to 15 mph
N
|
|
Saturday Night
Oct 17
|
Widespread Frost
|
31°F |
1 to 7 mph
N
|
|
Sunday
Oct 18
|
Widespread Frost then Sunny
|
56°F |
2 mph
W
|
|
Sunday Night
Oct 18
|
Mostly Clear then Areas Of Frost
|
36°F |
2 mph
SE
|
|
Monday
Oct 19
|
Areas Of Frost then Sunny
|
60°F |
2 mph
NW
|
|
Monday Night
Oct 19
|
Partly Cloudy
|
40°F |
1 mph
NE
|
|
Tuesday
Oct 20
|
Mostly Sunny
|
63°F |
1 mph
N
|
|
Tuesday Night
Oct 20
|
Partly Cloudy
|
41°F |
1 mph
N
|
|
Wednesday
Oct 21
|
Sunny
|
62°F |
2 mph
N
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Herndon.