See exactly when rain will start and stop with a minute-by-minute precipitation nowcast for the next hour.
Compare today's weather with yesterday's data and track temperature trends over time.
Hourly Forecast
Daylight Hours
07:08
Sunrise
19:33
Sunset
Moon
Waxing Crescent
12:50
Moonrise
20:21
Moonset
Daily Forecast
Today
Wednesday
Thursday
Friday
Saturday
Sunday
Monday
Tuesday
Wednesday
Thursday
Air Quality Data Available
Upgrade to access real-time air quality data for Coleraine.
Resources
UV Index
Humidity
Weather in Coleraine today, September 15, 2026
Coleraine looks damp on September 15, 2026, so plan for wet spells during the day. Early travel and outdoor time should assume rain can arrive quickly. Wetter spells lean into the morning, when rain odds reach about 100% near 11:00. Skies look heaviest around 10:00, with cover close to 95%.
Temperatures climb from an overnight low near 13°C toward a daytime high of about 17°C. Relative humidity sits between 78% and 91%, reaching its peak around 08:00. Airflow remains manageable, reaching about 7.7 km/h around 15:00.
Through the afternoon wet weather remains a factor, with rain chances near 100% around 12:00. Cloud also stays substantial, close to 95% near 23:00. Horizontal visibility sits around 26.9 km, briefly nearer 20.7 km. Sunrise is at 07:08 and sunset at 19:33, giving 12 hours 25 minutes of sunlight today.
Taken together, Coleraine looks wet enough on September 15, 2026 that flexible outdoor plans work best, with temperatures peaking near 17°C.
Frequently asked questions about weather in Coleraine
How warm does it get in Coleraine?
The warmest month in Coleraine is August, with average high temperatures of 16°C. The average temperature during this period is around 15°C.
How cold does it get in Coleraine?
The coldest month in Coleraine is February, with average low temperatures of 6°C. The average temperature during this period is around 7°C.
What is the wettest time of year in Coleraine?
The wettest month in Coleraine is October, with an average of 152mm of precipitation.
What is the driest time of year in Coleraine?
The driest month in Coleraine is May, with an average of 70mm of precipitation.
Explore more weather forecasts
- Limavady, Northern Ireland
- London, England
- Ballymena, Northern Ireland
- Birmingham, England
- Derry, Northern Ireland
- Liverpool, England
- Antrim, Northern Ireland
- Glasgow, Scotland
- Cookstown, Northern Ireland
- Manchester, England
- Strabane, Northern Ireland
- Sheffield, England
- Larne, Northern Ireland
- Leeds, England
- Dungannon, Northern Ireland
- Edinburgh, Scotland
