Collinsville, PA Weather Forecast
Local 7-day forecast
Mostly Sunny then Chance Showers And Thunderstorms
Track current conditions, temperature changes, wind, and the full daily outlook for Collinsville, PA in one place.
A chance of rain showers between 2pm and 5pm, then a chance of showers and thunderstorms. Mostly sunny, with a high near 86. South wind 2 to 7 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
Local Weather Overview
This forecast page for Collinsville, 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 3:29 AM EDT.
The active forecast window currently covers Sep 17 to Sep 22, 2026 for Collinsville, PA.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Sep 17 to Sep 22, 2026
- Latest sync
- Sep 16, 2026 3:29 AM EDT
- Forecast office
- CTP
- Source
- NOAA / NWS
Daily Outlook
This Week in Collinsville
Thursday looks like the warmest upcoming period in Collinsville at 86 degrees F.
Friday Night is the coolest period ahead with temperatures near 56 degrees F.
The strongest winds are forecast for Friday at about 7 to 12 mph N.
Precipitation is mentioned in 8 upcoming forecast periods.
Forecast Details
- Last updated
- Sep 16, 2026 3:29 AM EDT
- Coverage
- 6 days
- Time zone
- America/New_York
- Forecast office
- CTP
- Radar station
- KLWX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
A chance of showers and thunderstorms before 2am. Mostly cloudy, with a low around 67. Southwest wind 2 to 7 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
Mostly sunny, with a high near 81.
Partly cloudy, with a low around 56.
Mostly sunny, with a high near 76.
A chance of rain showers after 2am. Mostly cloudy, with a low around 61. Chance of precipitation is 30%.
A chance of rain showers before 2pm, then showers and thunderstorms likely. Mostly cloudy, with a high near 77. Chance of precipitation is 60%.
Showers and thunderstorms likely. Mostly cloudy, with a low around 62. Chance of precipitation is 60%.
A chance of rain showers before 2pm, then a chance of showers and thunderstorms. Mostly cloudy, with a high near 77. Chance of precipitation is 40%.
A chance of showers and thunderstorms. Mostly cloudy, with a low around 61. Chance of precipitation is 50%.
A chance of rain showers. Mostly cloudy, with a high near 75.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Thursday
Sep 17
|
Mostly Sunny then Chance Showers And Thunderstorms
|
86°F |
2 to 7 mph
S
|
|
Thursday Night
Sep 17
|
Chance Showers And Thunderstorms
|
67°F |
2 to 7 mph
SW
|
|
Friday
Sep 18
|
Mostly Sunny
|
81°F |
7 to 12 mph
N
|
|
Friday Night
Sep 18
|
Partly Cloudy
|
56°F |
5 to 9 mph
N
|
|
Saturday
Sep 19
|
Mostly Sunny
|
76°F |
5 to 8 mph
E
|
|
Saturday Night
Sep 19
|
Mostly Cloudy then Chance Rain Showers
|
61°F |
12 mph
SE
|
|
Sunday
Sep 20
|
Showers And Thunderstorms Likely
|
77°F |
10 mph
S
|
|
Sunday Night
Sep 20
|
Showers And Thunderstorms Likely
|
62°F |
6 to 9 mph
SE
|
|
Monday
Sep 21
|
Chance Rain Showers
|
77°F |
10 mph
E
|
|
Monday Night
Sep 21
|
Chance Showers And Thunderstorms
|
61°F |
7 to 10 mph
E
|
|
Tuesday
Sep 22
|
Chance Rain Showers
|
75°F |
12 mph
E
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Collinsville.