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Hourly Forecast
Daylight Hours
07:07
Sunrise
19:28
Sunset
Moon
Waxing Crescent
14:04
Moonrise
20:42
Moonset
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Weather in Belfast today, September 16, 2026
Rain features in Belfast on September 16, 2026, so keep waterproofs handy through the day. The damp theme is strongest where shower chances rise. The first half of the day looks overcast, as cloud amounts reach about 100% around 11:00. Brighter weather, if it comes, waits until later.
Temperatures climb from an overnight low near 12°C toward a daytime high of about 15°C. Relative humidity sits between 70% and 91%, reaching its peak around 22:00. A lighter breeze peaks around 22:00 near 5.0 km/h.
Expect the wet theme to continue later, as rain odds reach 46% near 21:00. Cloud amounts hold near 100% around 12:00. Visibility stays generally good near 31.2 km on average, though it can drop toward 21.2 km in thicker cloud or showers. The sun rises at 07:07 and sets at 19:28, for a total of 12 hours 20 minutes of sunlight today.
The practical takeaway for Belfast on September 16, 2026 is simple: plan for rain, keep layers handy, and work around a high of about 15°C.
Frequently asked questions about weather in Belfast
How warm does it get in Belfast?
The warmest month in Belfast is July, with average high temperatures of 18°C. The average temperature during this period is around 15°C.
How cold does it get in Belfast?
The coldest month in Belfast is January, with average low temperatures of 4°C. The average temperature during this period is around 6°C.
What is the wettest time of year in Belfast?
The wettest month in Belfast is August, with an average of 95mm of precipitation.
What is the driest time of year in Belfast?
The driest month in Belfast is April, with an average of 61mm of precipitation.
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