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Dublin Weather in September

September in Dublin brings very high temperatures around 31°C (88°F) during the day, dropping to 18°C (64°F) at night, with quite a bit of rainfall expected, averaging around 77 mm (3 in) for the month.

Rainfall in Dublin in September

The climate data from previous years indicates about 9 days of rain, averaging 77 mm (3 in) for the month. Rainfall intensity is on the higher side this month. Expect more substantial showers rather than light, passing rain.

Temperature in Dublin in September

In September, Dublin sees very high temperatures, with highs of 31°C (88°F). Nights drop to around 18°C (64°F). Sunshine and humidity can make it feel even warmer than the raw temperature suggests. Nights cool down to 18°C (64°F), so a light jacket or extra layer is useful once the sun goes down. On the plus side, the cooler nights make for comfortable sleeping conditions.

For Dublin itself, March, April, May, October and November generally stand out with the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.

Dublin Temperature in September

Min Temperature
18°C (64°F)
Max Temperature
31°C (88°F)
Chance of Rain
30%
Precipitation
77 mm (3 in)
Rainy days
9 days

Dublin Weather by Month

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

Best Places in the United States of America in September

Find out more about the weather in the United States of America and which places have the best travel conditions in this month. See all of the United States of America 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 Dublin in September

Warm weather calls for comfortable, breathable clothing in September. Cotton t-shirts, shorts, light dresses, and sandals are perfect. You might still want a light layer for evenings or air-conditioned places (for example buses). Rain is likely on several days, so bring a good rain jacket.

What To Do in Dublin in September

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

  • Cycling
    7/10
  • Walking
    7/10
  • Camping
    8/10
  • Outdoor sports
    7/10

Dublin 3-Day Forecast

More climate data for Dublin

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.