Belfast weather forecast: Sunny intervals with high chance of rain today, cooler week ahead

Belfast, September 12, 2026 – Residents of Belfast can expect a day of mixed weather, with sunny intervals interspersed with a high probability of rain. The day will begin with a moderate temperature, but conditions are set to become cooler as the week progresses.The city is bracing for a day where umbrellas are likely to be a necessity, despite periods of sunshine. The chance of rain is significant, making it important for individuals to be prepared for potential downpours.Belfast Weather TodayToday, September 12, 2026, Belfast will experience a day characterized by sunny intervals. The maximum temperature is forecast to reach 20°C, while the minimum temperature will be around 12°C, with an average temperature of 16.0°C. There is a high likelihood of rain, with a 95% chance of precipitation. The wind is expected to be brisk, with a maximum speed of 51.5 kph. Humidity levels will be high, reaching 93%.The weather conditions suggest a day that will feel cool and damp for much of the time, despite the presence of sunshine. The combination of a high chance of rain and significant wind speeds means that outdoor activities may be subject to disruption.Umbrellas and waterproof footwear advisedGiven the high probability of rain throughout the day, it is strongly recommended that residents carry umbrellas and wear waterproof footwear. The brisk winds could make the perceived temperature feel cooler, so layering clothing is advisable. While there will be periods of sunshine, these are expected to be interspersed with showers, meaning conditions can change rapidly. Planning outdoor excursions should take into account the potential for wet weather and wind.Belfast Weather for Upcoming 7 DaysLooking ahead, the weather in Belfast is expected to become cooler and wetter as the week unfolds. The forecast indicates a trend of decreasing temperatures and an increase in precipitation chances beyond today.The warmest day in the upcoming period is expected to be September 14, with a high of 21°C. The coolest day will be September 17, with a low of 11°C. The chance of rain remains a consistent feature throughout the week, with several days showing a likelihood of showers or light rain.| Date | Day Condition | Max Temp (C) | Min Temp (C) | Avg Temp (C) ||------------|-----------------|--------------|--------------|--------------|| 2026-09-12 | Sunny intervals | 20 | 12 | 16.0 || 2026-09-13 | Sunny intervals | 19 | 15 | 17.0 || 2026-09-14 | Cloudy | 21 | 13 | 17.0 || 2026-09-15 | Light showers | 17 | 11 | 14.0 || 2026-09-16 | Light rain | 16 | 12 | 14.0 || 2026-09-17 | Light showers | 15 | 11 | 13.0 || 2026-09-18 | Light rain | 16 | 12 | 14.0 |The coming days suggest a period of unsettled weather, with residents needing to remain prepared for rain and cooler temperatures.Source: Data referenced in this article is taken from the latest World News and Live updates. Download the TOI app.