Live Weather & Forecast
Weather in Greencastle
Pennsylvania, United States · Real-time conditions & 3-day outlook
22°C
Feels like 25°C
72°F / Feels 76°F
Clear
Greencastle, Pennsylvania
🌙 Nighttime
Updated: 2026-04-16 06:30
Humidity
49%
Wind
6.8 km/h SW
Wind Gust
14.4 km/h
Pressure
1013 mb
Visibility
16 km
UV Index
0
(Low)
Precipitation
0 mm
Cloud Cover
0%
Dew Point
11.6°C
Wind Degree
214°
Air Quality Index
US EPA: Good
UK DEFRA: Low (1)
CO
183.9 μg/m³
NO₂
6 μg/m³
O₃
103 μg/m³
SO₂
5.7 μg/m³
PM 2.5
5.1 μg/m³
PM 10
5.5 μg/m³
Today's Hourly Forecast
24-hour breakdown for Greencastle, Pennsylvania
12 AM
23°
Clear
1 AM
22°
Clear
2 AM
22°
Clear
3 AM
21°
Clear
4 AM
21°
Clear
5 AM
20°
Clear
6 AM
22°
Clear
7 AM
20°
Sunny
8 AM
22°
Sunny
9 AM
24°
Sunny
10 AM
27°
Sunny
11 AM
29°
Sunny
12 PM
31°
Sunny
1 PM
32°
Sunny
2 PM
32°
Sunny
3 PM
31°
Partly Cloudy
4 PM
31°
Partly Cloudy
5 PM
31°
Partly Cloudy
6 PM
28°
Sunny
7 PM
25°
Partly Cloudy
8 PM
23°
Clear
9 PM
22°
Partly Cloudy
10 PM
22°
Overcast
11 PM
21°
Overcast
3-Day Forecast
Daily overview for Greencastle, Pennsylvania
Today
Sunny
33°
/
19°
🌧️ 0% chance of rain
💧 Avg. humidity: 51%
💨 Max wind: 29.2 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 1.9
🌅 Sunrise: 06:32 AM
🌇 Sunset: 07:51 PM
🌙 Waning Crescent
🌑 Moon: 3% lit
Fri, Apr 17
Partly Cloudy
24°
/
14°
🌧️ 0% chance of rain
💧 Avg. humidity: 73%
💨 Max wind: 21.2 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 1.7
🌅 Sunrise: 06:30 AM
🌇 Sunset: 07:52 PM
🌙 New Moon
🌑 Moon: 0% lit
Sat, Apr 18
Partly Cloudy
25°
/
12°
🌧️ 0% chance of rain
💧 Avg. humidity: 77%
💨 Max wind: 25.2 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 1.8
🌅 Sunrise: 06:29 AM
🌇 Sunset: 07:52 PM
🌙 Waxing Crescent
🌑 Moon: 1% lit
Best Time to Visit Greencastle
Plan your trip to Greencastle, 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 Greencastle?
Current conditions in Greencastle: Clear, temperature 22°C, humidity 49%.
What is the best time to visit Greencastle?
The best time to visit Greencastle is typically June – September. Warm, dry summers — ideal for outdoor activities.
What is the climate like in Greencastle?
Greencastle is located at approximately 39.8° latitude. It has a temperate climate with warm summers and cold winters.
Does it rain a lot in Greencastle?
The wettest period in Greencastle is typically during November – March. Cooler temperatures; some regions may experience rain or snow.
What should I pack for a trip to Greencastle?
For visits to Greencastle during June – September: light clothing and sun protection. For November – March: layers and a waterproof jacket are recommended.
What country is Greencastle in?
Greencastle is located in United States, in the state of Pennsylvania.
What are the public holidays in Greencastle in 2026?
View the 2026 public holidays for Greencastle on our Holidays page.
What are the GPS coordinates used for the weather forecast in Greencastle?
The weather forecast for Greencastle uses coordinates 39.7904, -77.7278.