Belfast
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Belfast Weather in September

In Belfast, September brings high daytime temperatures around 24°C (75°F), with nights cooling to 9°C (48°F). Some rainfall is to be expected.

Rainfall in Belfast in September

Based on our climate data of the past 30 years, about 4 days of rain are anticipated, with 26 mm (1 in) on average. The rain this month typically falls in concentrated bursts rather than all-day showers. Expect a few heavier spells rather than constant grey skies.

Temperature in Belfast in September

September in Belfast is generally excellent, with days reaching 24°C (75°F) and nights settling around 9°C (48°F). Overall, the month follows a fairly predictable daily temperature pattern. With lows around 9°C (48°F), nights are cold. The upside is that cool, crisp nights are often the best for a deep sleep.

If your ideal day consists of dry skies and pleasant temperatures, April, May, June, July, August, September and October typically offer the best circumstances for Belfast.

Belfast Temperature in September

Min Temperature
9°C (48°F)
Max Temperature
24°C (75°F)
Chance of Rain
12%
Precipitation
26 mm (1 in)
Rainy days
4 days

Belfast Weather by Month

Pick a month to see the average temperature, rainfall and sunshine in Belfast - and find the best time to visit.

Best Places in South Africa in September

Find out more about the weather in South Africa and which places have the best travel conditions in this month. See all of South Africa in September →

perfect weather
pleasant
tolerable
unpleasant
poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).

What to Wear in Belfast in September

Pleasant temperatures in September mean you can pack light but flexibel pieces. Think cotton t-shirts, comfortable walking shorts, and one warmer layer for evenings. A light sweater or denim jacket works well. Pack a light rain jacket or compact umbrella for occasional showers.

What To Do in Belfast in September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

  • Cycling
    10/10
  • Walking
    10/10
  • Camping
    5/10
  • Outdoor sports
    10/10

Belfast 3-Day Forecast

More climate data for Belfast

Popular in September

Where to go in September - average daytime high across popular destinations.

Bucket list

Need travel inspiration? Check out our bucket list articles and be inspired.