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Climate · Dublin

Dublin in September

Mild and damp, as the days shorten.

Typical weather, averaged over 30 years

September in Dublin is mild: highs near 66°F, lows near 52°F. Rain falls on about three days a week, and the days shorten by 1 hour 31 minutes from the first week to the last.September in Dublin is mild: highs near 19°C, lows near 11°C. Rain falls on about three days a week, and the days shorten by 1 hour 31 minutes from the first week to the last.

High
66°F19°Caverage
Low
52°F11°Caverage
Wet days
3a week · 43% of days
Daylight
12h 33mon average

Is September a good time to visit Dublin?

A good month, just outside Dublin's best months, which run from July to August.

How we judge it: every month is scored on how close its typical high comes to the range from 70°F to 80°F, how mild its nights are, and how rarely it rains. The best months are the run of months that scores best.How we judge it: every month is scored on how close its typical high comes to the range from 21°C to 27°C, how mild its nights are, and how rarely it rains. The best months are the run of months that scores best.

How September sits in the year

week by week

Temperature

Highs near 66°F in September, against 49°F to 69°F through the year.Highs near 19°C in September, against 9°C to 21°C through the year.

Chance of a wet day

43% of days in September, against 42% to 53% through the year.

Cloud cover

57% cover in September, against 56% to 70% through the year.

Daylight

12h 33m in September, against 7h 35m to 16h 54m through the year.

Week by week, lightly smoothed, with September shaded. The olive line marks the best months. Hover or tap a week for its figures.

Either side

  1. August69°21°low 55°low 13°4 wet days a weekRain on about four days a week.
  2. September66°19°low 52°low 11°3 wet days a weekRain on about three days a week.
  3. October61°16°low 48°low 9°3 wet days a weekRain on about three days a week.

Where Dublin sits, in September

Europe/Dublin
this place
typical high in September 40°F4°C95°F35°C
Sunrise, mid-September
6:57 AMsets 7:44 PM
Above the sea
10 mlow-lying
Latitude
53.3°Nnorthern hemisphere
Nearest of ours
Adare (Limerick)176 km south-west

The land around Dublin, shaded by its typical high in September, the planning map's own layer. Hover the map for the figure at that spot; tap it on a phone. Clock times are local, for the 15th.

Elsewhere in Ireland in September

high · low · wet days
See September on the planning mapThe whole year in Dublin

Typical weather, averaged over 30 years (1995–2024), from the 11 km grid square nearest Dublin. Temperatures are adjusted against 66 weather stations: daytime highs read about 3.1°F cold in the source data and are raised to match, and both highs and lows are adjusted for the town's height (10 m) against the climate model's (144 m).Temperatures are adjusted against 66 weather stations: daytime highs read about 1.7°C cold in the source data and are raised to match, and both highs and lows are adjusted for the town's height (10 m) against the climate model's (144 m). Daylight is calculated from latitude. Charts are lightly smoothed week to week; the figures in the table are not. Source: Copernicus ERA5-Land reanalysis; cloud cover from NASA's MERRA-2 reanalysis, on a coarser grid of about 50 km. Contains modified Copernicus Climate Change Service information 2026; neither the European Commission nor ECMWF is responsible for any use of it. These are averages, not a forecast.

Daylight is calculated from latitude. Charts are lightly smoothed week to week; the figures in the table are not.

Source: Copernicus ERA5-Land reanalysis; cloud cover from NASA's MERRA-2 reanalysis, on a coarser grid of about 50 km. Contains modified Copernicus Climate Change Service information 2026; neither the European Commission nor ECMWF is responsible for any use of it. These are averages, not a forecast.