Live Weather & Forecast
Weather in Saint Clair
Pennsylvania, United States · Real-time conditions & 3-day outlook
15°C
Feels like 15°C
59°F / Feels 58°F
Clear
Saint Clair, Pennsylvania
🌙 Nighttime
Updated: 2026-04-12 20:15
Humidity
43%
Wind
17.6 km/h SSE
Wind Gust
29.9 km/h
Pressure
1025 mb
Visibility
10 km
UV Index
0
(Low)
Precipitation
0 mm
Cloud Cover
0%
Dew Point
2°C
Wind Degree
161°
Air Quality Index
US EPA: Good
UK DEFRA: Low (1)
CO
211.9 μg/m³
NO₂
7.2 μg/m³
O₃
93 μg/m³
SO₂
5.6 μg/m³
PM 2.5
8.8 μg/m³
PM 10
9 μg/m³
Weather Alerts 1
Met
· Moderate · Expected
Special Weather Statement issued April 12 at 4:55AM EDT by NWS State College PA
The combination of drying fine fuels and leaf litter, low relative humidity of around 35 percent and a southerly wind gusting between 20 and 25 mph during the late morning and afternoon hours, will create an elevated risk of wildfire spread across the southern half of Pennsylvania today. Residents are urged to exercise caution if handling any potential ignition sources, such as machinery, cigaret...
Today's Hourly Forecast
24-hour breakdown for Saint Clair, Pennsylvania
12 AM
8°
Clear
1 AM
7°
Clear
2 AM
6°
Clear
3 AM
5°
Clear
4 AM
4°
Clear
5 AM
4°
Clear
6 AM
3°
Clear
7 AM
4°
Sunny
8 AM
6°
Sunny
9 AM
8°
Sunny
10 AM
10°
Sunny
11 AM
13°
Sunny
12 PM
15°
Sunny
1 PM
17°
Sunny
2 PM
18°
Sunny
3 PM
19°
Sunny
4 PM
20°
Sunny
5 PM
20°
Sunny
6 PM
20°
Sunny
7 PM
17°
Sunny
8 PM
15°
Clear
9 PM
13°
Clear
10 PM
12°
Clear
11 PM
11°
Clear
3-Day Forecast
Daily overview for Saint Clair, Pennsylvania
Today
Sunny
21°
/
3°
🌧️ 0% chance of rain
💧 Avg. humidity: 43%
💨 Max wind: 21.6 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 1.7
🌅 Sunrise: 06:30 AM
🌇 Sunset: 07:41 PM
🌙 Waning Crescent
🌑 Moon: 33% lit
Mon, Apr 13
Patchy rain nearby
21°
/
10°
🌧️ 80% chance of rain
💧 Avg. humidity: 84%
💨 Max wind: 25.6 km/h
🌧️ Total precip: 2.65 mm
☀️ UV Index: 1.2
🌅 Sunrise: 06:29 AM
🌇 Sunset: 07:42 PM
🌙 Waning Crescent
🌑 Moon: 23% lit
Tue, Apr 14
Mist
25°
/
15°
🌧️ 0% chance of rain
💧 Avg. humidity: 78%
💨 Max wind: 19.8 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 1.7
🌅 Sunrise: 06:27 AM
🌇 Sunset: 07:44 PM
🌙 Waning Crescent
🌑 Moon: 15% lit
Best Time to Visit Saint Clair
Plan your trip to Saint Clair, United States around the most favorable weather conditions.
Peak Season
June – September
Warm, dry summers — ideal for outdoor activities.
Shoulder Season
April – May, October
Fewer crowds, moderate prices, mild weather.
Off Season
November – March
Cooler temperatures; some regions may experience rain or snow.
Frequently Asked Questions
What is the current weather in Saint Clair?
Current conditions in Saint Clair: Clear, temperature 15°C, humidity 43%.
What is the best time to visit Saint Clair?
The best time to visit Saint Clair is typically June – September. Warm, dry summers — ideal for outdoor activities.
What is the climate like in Saint Clair?
Saint Clair is located at approximately 40.7° latitude. It has a temperate climate with warm summers and cold winters.
Does it rain a lot in Saint Clair?
The wettest period in Saint Clair is typically during November – March. Cooler temperatures; some regions may experience rain or snow.
What should I pack for a trip to Saint Clair?
For visits to Saint Clair during June – September: light clothing and sun protection. For November – March: layers and a waterproof jacket are recommended.
What country is Saint Clair in?
Saint Clair is located in United States, in the state of Pennsylvania.
What are the public holidays in Saint Clair in 2026?
View the 2026 public holidays for Saint Clair on our Holidays page.
What are the GPS coordinates used for the weather forecast in Saint Clair?
The weather forecast for Saint Clair uses coordinates 40.7208, -76.1911.