Live Weather & Forecast
Weather in Saint Marys
Pennsylvania, United States · Real-time conditions & 3-day outlook
17°C
Feels like 17°C
63°F / Feels 63°F
Clear
Saint Marys, Pennsylvania
🌙 Nighttime
Updated: 2026-04-13 00:00
Humidity
54%
Wind
8.3 km/h S
Wind Gust
17.4 km/h
Pressure
1019 mb
Visibility
16 km
UV Index
0
(Low)
Precipitation
0 mm
Cloud Cover
0%
Dew Point
7.6°C
Wind Degree
172°
Air Quality Index
US EPA: Good
UK DEFRA: Low (1)
CO
185.9 μg/m³
NO₂
3.7 μg/m³
O₃
106 μg/m³
SO₂
7.5 μg/m³
PM 2.5
11.6 μg/m³
PM 10
11.8 μg/m³
Today's Hourly Forecast
24-hour breakdown for Saint Marys, Pennsylvania
12 AM
15°
Clear
1 AM
17°
Clear
2 AM
14°
Clear
3 AM
15°
Clear
4 AM
15°
Clear
5 AM
15°
Patchy rain nearby
6 AM
14°
Patchy rain nearby
7 AM
15°
Sunny
8 AM
15°
Sunny
9 AM
15°
Sunny
10 AM
16°
Patchy rain nearby
11 AM
17°
Cloudy
12 PM
18°
Overcast
1 PM
17°
Patchy rain nearby
2 PM
17°
Overcast
3 PM
17°
Thundery outbreaks in nearby
4 PM
17°
Overcast
5 PM
17°
Overcast
6 PM
18°
Overcast
7 PM
17°
Cloudy
8 PM
17°
Overcast
9 PM
17°
Overcast
10 PM
16°
Mist
11 PM
16°
Patchy light rain
3-Day Forecast
Daily overview for Saint Marys, Pennsylvania
Today
Patchy rain nearby
19°
/
14°
🌧️ 89% chance of rain
💧 Avg. humidity: 77%
💨 Max wind: 29.9 km/h
🌧️ Total precip: 2.75 mm
☀️ UV Index: 0.9
🌅 Sunrise: 06:37 AM
🌇 Sunset: 07:53 PM
🌙 Waning Crescent
🌑 Moon: 23% lit
Tue, Apr 14
Heavy rain
21°
/
16°
🌧️ 86% chance of rain
💧 Avg. humidity: 88%
💨 Max wind: 23.8 km/h
🌧️ Total precip: 23.21 mm
☀️ UV Index: 1.7
🌅 Sunrise: 06:36 AM
🌇 Sunset: 07:54 PM
🌙 Waning Crescent
🌑 Moon: 15% lit
Wed, Apr 15
Heavy rain
26°
/
17°
🌧️ 88% chance of rain
💧 Avg. humidity: 78%
💨 Max wind: 20.9 km/h
🌧️ Total precip: 22.77 mm
☀️ UV Index: 1.1
🌅 Sunrise: 06:34 AM
🌇 Sunset: 07:55 PM
🌙 Waning Crescent
🌑 Moon: 8% lit
Best Time to Visit Saint Marys
Plan your trip to Saint Marys, 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 Marys?
Current conditions in Saint Marys: Clear, temperature 17°C, humidity 54%.
What is the best time to visit Saint Marys?
The best time to visit Saint Marys is typically June – September. Warm, dry summers — ideal for outdoor activities.
What is the climate like in Saint Marys?
Saint Marys is located at approximately 41.4° latitude. It has a temperate climate with warm summers and cold winters.
Does it rain a lot in Saint Marys?
The wettest period in Saint Marys is typically during November – March. Cooler temperatures; some regions may experience rain or snow.
What should I pack for a trip to Saint Marys?
For visits to Saint Marys during June – September: light clothing and sun protection. For November – March: layers and a waterproof jacket are recommended.
What country is Saint Marys in?
Saint Marys is located in United States, in the state of Pennsylvania.
What are the public holidays in Saint Marys in 2026?
View the 2026 public holidays for Saint Marys on our Holidays page.
What are the GPS coordinates used for the weather forecast in Saint Marys?
The weather forecast for Saint Marys uses coordinates 41.428, -78.5611.