Belfast weather forecast: Light rain to clear for sunny intervals, mild temperatures expected

Belfast residents can expect a day of mixed weather, with the morning starting under a blanket of light rain. As the day progresses, the skies are expected to clear, offering intervals of sunshine. Temperatures will remain mild, making for a generally comfortable late September day.Belfast Weather TodayToday, September 18, 2026, Belfast will experience a transition from a damp start to a brighter afternoon. The day begins with light rain, a common occurrence for this time of year in the city. The maximum temperature is forecast to reach 17°C, while the minimum temperature will be around 13°C. The average temperature for the day is expected to be 15.0°C. Humidity levels are notably high, sitting at 92%, which may make the air feel a bit heavy despite the moderate temperatures. Wind speeds could reach up to 53.11 kph, adding a briskness to the air, especially during any showers. The chance of rain is less than 5%, suggesting that any precipitation will be light and short-lived.Light Rain to Give Way to Sunny IntervalsWith the morning's light rain expected to clear, residents can look forward to a more pleasant afternoon. The high humidity might make the air feel damp initially, but as the day progresses and the sun peeks through, conditions should improve. The moderate temperatures mean that while an umbrella might be useful for the early part of the day, it may not be needed for long. The wind, though present, is unlikely to be disruptive, but it's worth noting for those planning outdoor activities. Overall, it's a day that requires a bit of preparedness for the morning's drizzle, but promises a brighter outlook as the day unfolds.Belfast Weather for Upcoming 7 DaysFollowing today's mixed conditions, the weather in Belfast is set to see some fluctuations over the next week. Tomorrow, September 19, will bring sunny intervals with a slightly cooler feel, with temperatures ranging from 10°C to 17°C. September 20 is predicted to be a sunny day, with highs of 16°C and lows of 14°C. A significant change is expected on September 21, with overcast skies and a warmer day, reaching up to 22°C, while the minimum temperature will be 14°C. The following day, September 22, will see a return to cloudy conditions, with temperatures dropping to a low of 10°C and a high of 18°C. The week will continue with sunny intervals on September 23, with temperatures between 12°C and 16°C, followed by a cloudy day on September 24, with highs of 17°C and lows of 13°C.DateMax Temp (C)Min Temp (C)Avg Temp (C)Condition2026-09-18171315.0Light rain2026-09-19171013.5Sunny intervals2026-09-20161415.0Sunny2026-09-21221418.0Overcast2026-09-22181014.0Cloudy2026-09-23161214.0Sunny intervals2026-09-24171315.0CloudyThe week ahead in Belfast promises a varied weather pattern, with a notable warm spell expected mid-week.Source: Data referenced in this article is taken from the latest World News and Live updates. Download the TOI app.