Costello, PA Weather Forecast
Local 7-day forecast
Showers And Thunderstorms Likely
Track current conditions, temperature changes, wind, and the full daily outlook for Costello, PA in one place.
Showers and thunderstorms likely before 1pm, then a slight chance of showers and thunderstorms between 2pm and 3pm, then a chance of showers and thunderstorms. Mostly cloudy, with a high near 77. Southwest wind around 5 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch possible.
Local Weather Overview
This forecast page for Costello, 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: Sep 16, 2026 12:32 PM EDT.
The active forecast window currently covers Sep 17 to Sep 22, 2026 for Costello, PA.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Sep 17 to Sep 22, 2026
- Latest sync
- Sep 16, 2026 12:32 PM EDT
- Forecast office
- CTP
- Source
- NOAA / NWS
Daily Outlook
This Week in Costello
Thursday looks like the warmest upcoming period in Costello at 77 degrees F.
Friday Night is the coolest period ahead with temperatures near 48 degrees F.
The strongest winds are forecast for Saturday Night at about 7 mph SE.
Precipitation is mentioned in 10 upcoming forecast periods.
Forecast Details
- Last updated
- Sep 16, 2026 12:32 PM EDT
- Coverage
- 6 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
Showers and thunderstorms likely before 8pm. Mostly cloudy, with a low around 58. Northwest wind around 5 mph. Chance of precipitation is 60%. New rainfall amounts less than a tenth of an inch possible.
Mostly sunny, with a high near 71. North wind around 6 mph.
Partly cloudy, with a low around 48.
A chance of rain showers after 2pm. Mostly cloudy, with a high near 66. Chance of precipitation is 30%.
Rain showers likely before 2am, then showers and thunderstorms. Mostly cloudy, with a low around 55. Chance of precipitation is 80%.
Showers and thunderstorms. Cloudy, with a high near 67. Chance of precipitation is 80%.
A chance of rain showers. Mostly cloudy, with a low around 54. Chance of precipitation is 50%.
A chance of rain showers before 2pm, then a chance of showers and thunderstorms. Mostly cloudy, with a high near 67. Chance of precipitation is 50%.
A chance of showers and thunderstorms. Mostly cloudy, with a low around 55. Chance of precipitation is 50%.
A chance of rain showers before 2pm, then a chance of showers and thunderstorms. Mostly cloudy, with a high near 68. Chance of precipitation is 40%.
A chance of showers and thunderstorms. Mostly cloudy, with a low around 54.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Thursday
Sep 17
|
Showers And Thunderstorms Likely
|
77°F |
5 mph
SW
|
|
Thursday Night
Sep 17
|
Showers And Thunderstorms Likely then Mostly Cloudy
|
58°F |
5 mph
NW
|
|
Friday
Sep 18
|
Mostly Sunny
|
71°F |
6 mph
N
|
|
Friday Night
Sep 18
|
Partly Cloudy
|
48°F |
2 to 6 mph
NE
|
|
Saturday
Sep 19
|
Mostly Cloudy then Chance Rain Showers
|
66°F |
5 mph
SE
|
|
Saturday Night
Sep 19
|
Showers And Thunderstorms
|
55°F |
7 mph
SE
|
|
Sunday
Sep 20
|
Showers And Thunderstorms
|
67°F |
7 mph
E
|
|
Sunday Night
Sep 20
|
Chance Rain Showers
|
54°F |
6 mph
NE
|
|
Monday
Sep 21
|
Chance Rain Showers
|
67°F |
7 mph
E
|
|
Monday Night
Sep 21
|
Chance Showers And Thunderstorms
|
55°F |
7 mph
E
|
|
Tuesday
Sep 22
|
Chance Rain Showers
|
68°F |
7 mph
SE
|
|
Tuesday Night
Sep 22
|
Chance Showers And Thunderstorms
|
54°F |
7 mph
SE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Costello.