Northumberland County, PA Weather Forecast
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Sunny then Slight Chance Showers And Thunderstorms
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A slight chance of showers and thunderstorms after 5pm. Sunny, with a high near 97. Heat index values as high as 102. West wind 3 to 9 mph, with gusts as high as 21 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
County Weather Overview
This county weather page brings together forecast coverage for Northumberland County so visitors can compare temperatures, wind, and conditions across the region without hopping between unrelated pages.
Current forecast coverage spans 5 of 5 mapped cities in Northumberland County.
Page Snapshot
- Page focus
- county weather
- Forecast window
- Jul 15 to Jul 21, 2026
- Latest sync
- Jul 15, 2026 10:33 AM EDT
- Forecast office
- CTP
- Source
- NOAA / NWS
Daily Outlook
This Week in Northumberland County
Today looks like the warmest upcoming period in Northumberland County at 97 degrees F.
Sunday Night is the coolest period ahead with temperatures near 63 degrees F.
The strongest winds are forecast for Today at about 3 to 9 mph W.
Precipitation is mentioned in 11 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 15, 2026 10:33 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
A slight chance of showers and thunderstorms before 7pm, then smoke. Partly cloudy, with a low around 70. Heat index values as high as 100. Northwest wind 0 to 8 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
Smoke. Mostly sunny, with a high near 93. Northwest wind 0 to 9 mph, with gusts as high as 21 mph.
Smoke. Partly cloudy, with a low around 65. Northwest wind 0 to 8 mph.
Areas of smoke before noon. Mostly sunny, with a high near 89. Northwest wind around 2 mph.
A chance of showers and thunderstorms between 8pm and 2am, then showers and thunderstorms likely between 2am and 3am, then patchy smoke and showers and thunderstorms likely. Mostly cloudy, with a low around 68. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch possible.
Patchy smoke and showers and thunderstorms. Mostly cloudy, with a high near 84. Chance of precipitation is 80%.
Showers and thunderstorms. Mostly cloudy, with a low around 67. Chance of precipitation is 80%.
A chance of rain showers before 2pm, then a slight chance of showers and thunderstorms. Partly sunny, with a high near 85. Chance of precipitation is 30%.
A slight chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 63.
A slight chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 86.
A chance of showers and thunderstorms before 2am, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 67. Chance of precipitation is 50%.
Showers and thunderstorms likely. Partly sunny, with a high near 86. Chance of precipitation is 60%.
Showers and thunderstorms likely. Mostly cloudy, with a low around 63.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Today
Jul 15
|
Sunny then Slight Chance Showers And Thunderstorms
|
97°F |
3 to 9 mph
W
|
|
Tonight
Jul 15
|
Slight Chance Showers And Thunderstorms then Smoke
|
70°F |
0 to 8 mph
NW
|
|
Thursday
Jul 16
|
Smoke
|
93°F |
0 to 9 mph
NW
|
|
Thursday Night
Jul 16
|
Smoke
|
65°F |
0 to 8 mph
NW
|
|
Friday
Jul 17
|
Areas Of Smoke then Mostly Sunny
|
89°F |
2 mph
NW
|
|
Friday Night
Jul 17
|
Chance Showers And Thunderstorms
|
68°F |
1 mph
SE
|
|
Saturday
Jul 18
|
Patchy Smoke
|
84°F |
1 to 6 mph
S
|
|
Saturday Night
Jul 18
|
Showers And Thunderstorms
|
67°F |
5 mph
SW
|
|
Sunday
Jul 19
|
Chance Rain Showers then Slight Chance Showers And Thunderstorms
|
85°F |
3 to 7 mph
NW
|
|
Sunday Night
Jul 19
|
Slight Chance Showers And Thunderstorms then Partly Cloudy
|
63°F |
0 to 5 mph
NE
|
|
Monday
Jul 20
|
Mostly Sunny then Slight Chance Showers And Thunderstorms
|
86°F |
0 to 5 mph
S
|
|
Monday Night
Jul 20
|
Chance Showers And Thunderstorms
|
67°F |
2 to 6 mph
S
|
|
Tuesday
Jul 21
|
Showers And Thunderstorms Likely
|
86°F |
6 to 9 mph
SW
|
|
Tuesday Night
Jul 21
|
Showers And Thunderstorms Likely
|
63°F |
5 to 8 mph
W
|
Major City Forecasts
Live forecast snapshots for major cities across Northumberland County.
Coverage
Forecast coverage currently spans 5 of 5 mapped cities in Northumberland County.
Largest mapped city population in this region: 9,322.
