Average weather in September in Dublin (Dublin County), Ireland

The average minimum temperature (usually the minimum temperature is noted during the night) in Dublin in September is 10.0°C (50°F). The amount of rain in September is normal with an average of 66mm (2.6in). It rains on average a total of 10 days. The average maximum daytime temperature lies around 17.0°C (62.6°F). The sun will occasionally show itself with 128 hours of sunshine during the whole month.


So what to wear in September? Bring a rain jacket just in case since it will be raining a few days during this period. Plan on layering your clothes. Some days or part of the day it will be nice and warm and some moments it can be a bit chilly. With a water temperature of around 14.8°C (58.64°F), there is no need to bring your swimwear.

No idea where to travel to this year? We now have a tool which suggests which destination suits your ideal climate conditions. Find out where to go with our weather planner.

For other monthly average weather and what to do in September look at the numbers below.

Monthly Averages in September

Show in Celsius

Min Temperature 50 °F
Max Temperature 62 °F
Water Temperature 58 °F
Chance of Rain 33%
Precipitation 3 in
Rainy Days 10
Sunshine Hours 128

Where to stay in Dublin

Where to go in Ireland in September

Find out more about the weather in Ireland in September and which places have the best weather conditions in this month.

Legend perfect weather pleasant tolerable unpleasant poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20-29ºC / 68-84ºF and not too much precipitation (less than 90mm / 3.5inch a month).

What To Do

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

Swimming
6/10
Cycling
6/10
Walking
6/10
Camping
8/10
Outdoor sports
10/10

Weather Forecasts for Dublin (Dublin County)

FRI Aug 19
67°F | 53°F
Patchy rain possible

Patchy rain possible

SAT Aug 20
69°F | 54°F
Patchy rain possible

Patchy rain possible

SUN Aug 21
65°F | 50°F
Patchy rain possible

Patchy rain possible

Interested in more climate information?

Weather and Climate provides you with all the information you need about the climate in Dublin.

Our site offers climate and forecast data for almost all countries in the world. Are you going to Ireland? On this website you can find historical weather averages for many cities in Ireland. Not sure yet where to go? We now have a tool which suggests which destination suits your ideal climate conditions. Find out where to go with our weather planner.