Duncannon, PA Weather Forecast
Local 7-day forecast
Haze
Track current conditions, temperature changes, wind, and the full daily outlook for Duncannon, PA in one place.
Haze and patchy smoke after 8am. Sunny, with a high near 99. Heat index values as high as 104. West wind 5 to 10 mph, with gusts as high as 21 mph.
Local Weather Overview
This forecast page for Duncannon, 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: Jul 14, 2026 11:19 PM EDT.
The active forecast window currently covers Jul 15 to Jul 21, 2026 for Duncannon, PA.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jul 15 to Jul 21, 2026
- Latest sync
- Jul 14, 2026 11:19 PM EDT
- Forecast office
- CTP
- Source
- NOAA / NWS
Daily Outlook
This Week in Duncannon
Wednesday looks like the warmest upcoming period in Duncannon at 99 degrees F.
Sunday Night is the coolest period ahead with temperatures near 67 degrees F.
The strongest winds are forecast for Wednesday at about 5 to 10 mph W.
Precipitation is mentioned in 8 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 14, 2026 11:19 PM 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
Haze and patchy smoke before 8pm. Partly cloudy, with a low around 74. Northwest wind 1 to 9 mph.
Haze and areas of smoke after 8am. Mostly sunny, with a high near 95. Northwest wind 0 to 10 mph, with gusts as high as 21 mph.
Haze and areas of smoke before 8pm. Mostly clear, with a low around 69. Northwest wind 1 to 9 mph.
Mostly sunny, with a high near 92.
A chance of showers and thunderstorms after 8pm. Partly cloudy, with a low around 68. Chance of precipitation is 40%.
A chance of showers and thunderstorms before 8am, then showers and thunderstorms likely. Partly sunny, with a high near 88. Chance of precipitation is 60%.
Showers and thunderstorms likely. Mostly cloudy, with a low around 69. Chance of precipitation is 60%.
A chance of rain showers before 2pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 88. Chance of precipitation is 30%.
A chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 67. Chance of precipitation is 30%.
A slight chance of rain showers between 8am and 2pm, then a slight chance of showers and thunderstorms. Mostly sunny, with a high near 89.
A slight chance of showers and thunderstorms before 8pm, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 68. Chance of precipitation is 30%.
A chance of rain showers before 2pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 88.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Wednesday
Jul 15
|
Haze
|
99°F |
5 to 10 mph
W
|
|
Wednesday Night
Jul 15
|
Haze then Partly Cloudy
|
74°F |
1 to 9 mph
NW
|
|
Thursday
Jul 16
|
Haze
|
95°F |
0 to 10 mph
NW
|
|
Thursday Night
Jul 16
|
Haze then Mostly Clear
|
69°F |
1 to 9 mph
NW
|
|
Friday
Jul 17
|
Mostly Sunny
|
92°F |
0 to 3 mph
NW
|
|
Friday Night
Jul 17
|
Chance Showers And Thunderstorms
|
68°F |
3 mph
E
|
|
Saturday
Jul 18
|
Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
|
88°F |
1 to 7 mph
S
|
|
Saturday Night
Jul 18
|
Showers And Thunderstorms Likely
|
69°F |
3 to 7 mph
SW
|
|
Sunday
Jul 19
|
Chance Rain Showers then Chance Showers And Thunderstorms
|
88°F |
5 to 8 mph
W
|
|
Sunday Night
Jul 19
|
Chance Showers And Thunderstorms then Partly Cloudy
|
67°F |
2 to 7 mph
N
|
|
Monday
Jul 20
|
Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms
|
89°F |
5 mph
W
|
|
Monday Night
Jul 20
|
Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms
|
68°F |
5 mph
SW
|
|
Tuesday
Jul 21
|
Chance Rain Showers
|
88°F |
5 to 9 mph
SW
|
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