See exactly when rain will start and stop with a minute-by-minute precipitation nowcast for the next hour.
21°
Clear
Feels Like: 21°
Min: 13°
Max: 24°
The next few hours will be clear, with tomorrow reaching 33°C and dropping to 22°C. The coming days will be cloudy
Compare today's weather with yesterday's data and track temperature trends over time.
Hourly Forecast
Daylight Hours
07:33
Sunrise
19:51
Sunset
Moon
Waxing Crescent
11:16
Moonrise
20:58
Moonset
Daily Forecast
Monday
Today
Wednesday
Thursday
Friday
Saturday
Sunday
Monday
Tuesday
Wednesday
Air Quality Data Available
Upgrade to access real-time air quality data for Greencastle.
Resources
UV Index
Humidity
Weather in Greencastle tomorrow, September 15, 2026
Greencastle starts September 15, 2026 looking damp, with rain in the forecast and wetter spells likely at times. Waterproof kit is the safer call for early plans. The first half of the day looks overcast, as cloud amounts reach about 100% around 06:00. Brighter weather, if it comes, waits until later.
Temperatures climb from an overnight low near 17°C toward a daytime high of about 33°C. The air stays humid, with relative humidity between 51% and 87% and the peak around 08:00. Expect gentle winds, highest near 12:00 at 4.9 km/h.
The afternoon keeps an overcast feel, as cloud reaches about 100% around 12:00. Outdoor plans may still want a flexible backup. Visibility stays near 16.1 km. Expect sunrise at 07:34, sunset at 19:49, and 12 hours 14 minutes of sunlight today overall.
In short, treat September 15, 2026 in Greencastle as a damp day: pack covers, watch the wetter hours, and expect a high near 33°C.
Frequently asked questions about weather in Greencastle
How warm does it get in Greencastle?
The warmest month in Greencastle is July, with average high temperatures of 29°C. The average temperature during this period is around 25°C.
How cold does it get in Greencastle?
The coldest month in Greencastle is January, with average low temperatures of -5°C. The average temperature during this period is around -1°C.
What is the wettest time of year in Greencastle?
The wettest month in Greencastle is March, with an average of 128mm of precipitation.
What is the driest time of year in Greencastle?
The driest month in Greencastle is September, with an average of 69mm of precipitation.
Explore more weather forecasts
- Plainfield, Indiana
- New York City, New York
- Avon, Indiana
- Los Angeles, California
- Crawfordsville, Indiana
- Brooklyn, New York
- Martinsville, Indiana
- Chicago, Illinois
- Brownsburg, Indiana
- Houston, Texas
- Fairfield Heights, Indiana
- Queens, New York
- Terre Haute, Indiana
- Phoenix, Arizona
- Speedway, Indiana
- Philadelphia, Pennsylvania
