Saint Clair, PA Weather Forecast
Local 7-day forecast
Mostly Cloudy
Track current conditions, temperature changes, wind, and the full daily outlook for Saint Clair, PA in one place.
Mostly cloudy, with a low around 64. Northeast wind around 1 mph.
Local Weather Overview
This forecast page for Saint Clair, 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: Apr 16, 2026 5:48 AM EDT.
The active forecast window currently covers Apr 16 to Apr 22, 2026 for Saint Clair, PA.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Apr 16 to Apr 22, 2026
- Latest sync
- Apr 16, 2026 5:48 AM EDT
- Forecast office
- CTP
- Source
- NOAA / NWS
Daily Outlook
This Week in Saint Clair
Thursday looks like the warmest upcoming period in Saint Clair at 85 degrees F.
Monday Night is the coolest period ahead with temperatures near 29 degrees F.
The strongest winds are forecast for Monday at about 7 to 10 mph NW.
Precipitation is mentioned in 10 upcoming forecast periods.
Forecast Details
- Last updated
- Apr 16, 2026 5:48 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 85. West wind 1 to 6 mph.
A slight chance of rain showers between 8pm and 2am. Mostly cloudy, with a low around 61. West wind around 5 mph. Chance of precipitation is 20%.
A slight chance of rain showers after 8am. Mostly sunny, with a high near 75. Northwest wind around 5 mph. Chance of precipitation is 20%.
A slight chance of rain showers before 8pm. Mostly clear, with a low around 56. Northeast wind around 2 mph. Chance of precipitation is 20%.
A slight chance of rain showers after 2pm. Mostly sunny, with a high near 77. Chance of precipitation is 20%.
Rain showers likely. Mostly cloudy, with a low around 45. Chance of precipitation is 60%.
Rain showers likely. Mostly cloudy, with a high near 55. Chance of precipitation is 60%.
A chance of rain showers before 2am, then a slight chance of snow showers. Partly cloudy, with a low around 33. Chance of precipitation is 40%.
A slight chance of snow showers before 8am. Mostly sunny, with a high near 47.
Partly cloudy, with a low around 29.
Sunny, with a high near 57.
A slight chance of rain showers after 2am. Partly cloudy, with a low around 43.
A slight chance of rain showers. Partly sunny, with a high near 66.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Overnight
Apr 16
|
Mostly Cloudy
|
64°F |
1 mph
NE
|
|
Thursday
Apr 16
|
Mostly Sunny
|
85°F |
1 to 6 mph
W
|
|
Thursday Night
Apr 16
|
Slight Chance Rain Showers
|
61°F |
5 mph
W
|
|
Friday
Apr 17
|
Slight Chance Rain Showers
|
75°F |
5 mph
NW
|
|
Friday Night
Apr 17
|
Slight Chance Rain Showers then Mostly Clear
|
56°F |
2 mph
NE
|
|
Saturday
Apr 18
|
Mostly Sunny then Slight Chance Rain Showers
|
77°F |
1 to 7 mph
SE
|
|
Saturday Night
Apr 18
|
Rain Showers Likely
|
45°F |
3 to 7 mph
S
|
|
Sunday
Apr 19
|
Rain Showers Likely
|
55°F |
6 to 9 mph
NW
|
|
Sunday Night
Apr 19
|
Chance Rain Showers then Slight Chance Snow Showers
|
33°F |
8 mph
NW
|
|
Monday
Apr 20
|
Slight Chance Snow Showers then Mostly Sunny
|
47°F |
7 to 10 mph
NW
|
|
Monday Night
Apr 20
|
Partly Cloudy
|
29°F |
2 to 7 mph
NW
|
|
Tuesday
Apr 21
|
Sunny
|
57°F |
2 to 7 mph
W
|
|
Tuesday Night
Apr 21
|
Partly Cloudy then Slight Chance Rain Showers
|
43°F |
2 to 6 mph
SW
|
|
Wednesday
Apr 22
|
Slight Chance Rain Showers
|
66°F |
2 to 7 mph
SW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Saint Clair.