Will it rain in
Belfast today?
Live hourly rain forecast and run verdict for Belfast, Northern Ireland, UK.
Running in Belfast means contending with Northern Ireland's damp maritime climate and fast-changing skies. Whether it's a soft morning mist along the Lagan Towpath, sideways rain sweeping across the Titanic Quarter, or a brisk wind up Cave Hill, knowing whether to head out before you lace up matters. RainOrRun checks live conditions in Belfast right now and gives you an instant verdict — plus the best hourly window if the weather's on the fence. We'll also recommend the right gear for whatever Belfast's unpredictable skies are throwing at you today.
What to wear
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How often does it rain in Belfast?
Belfast records around 1009mm of rain a year, spread across about 178 days — roughly 49% of all days, or 15 days in an average month. That is a genuinely wet climate for running. Rain falls on more days than not in Belfast, so the realistic approach is to run in it rather than around it — which makes a breathable waterproof and good grip the two things worth spending on.
The wettest month is August, averaging 104mm across about 18 rainy days. The driest is April, with 61mm over roughly 13 days. Average lows bottom out around 3°C in January — long-sleeve and light-glove weather rather than full winter kit. Summer highs peak around 18.2°C in July, comfortable for most daytime running.
Those are ten-year averages, not a forecast. What actually matters on the day is the next twelve hours — which is what the live verdict and hourly strip at the top of this page are for.
| Month | Rainfall | Rainy days | Avg high | Avg low |
|---|---|---|---|---|
| January | 68mm | 14 | 7.3°C | 3°C |
| February | 79mm | 14 | 8°C | 3.2°C |
| March | 82mm | 16 | 9.3°C | 3.5°C |
| April | 61mm | 13 | 11°C | 4.8°C |
| May | 70mm | 14 | 14.6°C | 7.7°C |
| June | 81mm | 14 | 17.1°C | 10.6°C |
| July | 100mm | 18 | 18.2°C | 11.9°C |
| August | 104mm | 18 | 18°C | 12°C |
| September | 87mm | 14 | 16.1°C | 10.5°C |
| October | 90mm | 14 | 13.2°C | 8.5°C |
| November | 89mm | 14 | 9.9°C | 5.5°C |
| December | 98mm | 15 | 8.4°C | 4.3°C |
Historical data: Open-Meteo archive, 2015–2024. A “rainy day” means at least 1mm of precipitation.
Running in Belfast: common questions
Will it rain in Belfast today?
The forecast card at the top of this page shows Belfast's rain probability for the current hour, plus an hour-by-hour breakdown for the rest of the day, using live Open-Meteo data. Historically, Belfast sees rain on about 178 days a year, so on any given day there is roughly a 49% chance of some rain falling.
Is it a good day to run in Belfast?
RainOrRun scores the live Belfast forecast on rain probability, rainfall amount, temperature, wind speed and severe weather, then returns a single verdict: Go, Maybe, or Don't Bother. A Maybe means conditions are borderline and it is worth picking your window rather than skipping the run.
What is the best time to run in Belfast today?
The hourly strip above highlights the best single window of the day for Belfast — the hour combining the lowest rain probability with the most comfortable temperature. You can also check up to eight days ahead using the date picker if you are planning a long run or a race.
What should I wear running in Belfast today?
The gear section on this page updates with the live Belfast forecast: a waterproof jacket and peaked cap when rain probability goes above 40%, a thermal base layer and gloves below 8 degrees Celsius, and a high-vis vest when wind or low light make you harder to see.
What is the wettest month in Belfast?
August is the wettest month in Belfast, averaging 104mm of rain across about 18 rainy days. April is the driest, with around 61mm over roughly 13 days. Figures are ten-year averages covering 2015 to 2024.
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