Donegal County Weather in September

Average temperatures, rainfall, sunshine and the best places to visit in Donegal County, Ireland in September.

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Bundoran Donegal Letterkenny Buncrana

Considering a trip to Donegal County, Ireland this September and wondering about the expected weather conditions? Find all the crucial information you need right here, addressing your question:

What to Expect in Donegal County in September

Donegal County, Ireland is a region in Ireland. September in Donegal County generally has mild temperatures, with precipitation levels ranging from moderate to high.

Temperatures

You can expect mild maximum daytime temperatures of around 17°C (63°F) and nighttime temperatures around 10°C (50°F) in Bundoran.

For a closer look at conditions across Donegal County, Ireland, refer to the map below.

Precipitation

In September, precipitation varies across different areas. From moderate rainfall in Derry with an average of 88 mm (3.5 in) to high rainfall in Kincasslagh with 144 mm (5.7 in).

Explore Donegal County by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Best Places to Visit in Donegal County in September

Click on a destination dot for more details. Toggle the map to compare temperatures or precipitation across Donegal County.

Conditions Temperatures Precipitation
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).

Popular Destinations in Donegal County

What is the weather like in September for some of the most popular destinations in Donegal County, Ireland?

Temperature range in Donegal County (September)

Precipitation variation in Donegal County (September)

Bundoran

In September Bundoran generally has moderate temperatures with maximum daytime temperatures around 17°C (63°F), minimum nighttime temperatures around 10°C (50°F) and high monthly rainfall. So on average the conditions are unpleasant that month.

« August
September
October »
August
September
October
Max temperature
19°C (66°F)
17°C (63°F)
14°C (57°F)
Min temperature
12°C (54°F)
10°C (50°F)
8°C (46°F)
Monthly rainfall
121 mm (4.8 in)
105 mm (4.1 in)
122 mm (4.8 in)
Monthly rainy days
20 days
22 days
23 days
Weather conditions
tolerable
unpleasant
unpleasant
Climate in Bundoran →

Donegal

In September Donegal generally has moderate temperatures with maximum daytime temperatures around 17°C (63°F), minimum nighttime temperatures around 10°C (50°F) and high monthly rainfall. So on average the conditions are unpleasant that month.

« August
September
October »
August
September
October
Max temperature
18°C (64°F)
17°C (63°F)
14°C (57°F)
Min temperature
11°C (52°F)
10°C (50°F)
7°C (45°F)
Monthly sun hours
140 hours
118 hours
103 hours
Monthly rainfall
124 mm (4.9 in)
107 mm (4.2 in)
122 mm (4.8 in)
Monthly rainy days
21 days
22 days
23 days
Weather conditions
tolerable
unpleasant
unpleasant
Climate in Donegal →

Letterkenny

In September Letterkenny generally has moderate temperatures with maximum daytime temperatures around 17°C (63°F), minimum nighttime temperatures around 10°C (50°F) and moderate monthly rainfall. So on average the conditions are tolerable that month.

« August
September
October »
August
September
October
Max temperature
18°C (64°F)
17°C (63°F)
14°C (57°F)
Min temperature
12°C (54°F)
10°C (50°F)
8°C (46°F)
Monthly sun hours
140 hours
118 hours
103 hours
Monthly rainfall
115 mm (4.5 in)
99 mm (3.9 in)
111 mm (4.4 in)
Monthly rainy days
20 days
22 days
23 days
Weather conditions
tolerable
tolerable
unpleasant
Climate in Letterkenny →

Buncrana

In September Buncrana generally has moderate temperatures with maximum daytime temperatures around 17°C (63°F), minimum nighttime temperatures around 11°C (52°F) and moderate monthly rainfall. So on average the conditions are tolerable that month.

« August
September
October »
August
September
October
Max temperature
19°C (66°F)
17°C (63°F)
14°C (57°F)
Min temperature
12°C (54°F)
11°C (52°F)
8°C (46°F)
Monthly sun hours
140 hours
118 hours
103 hours
Monthly rainfall
109 mm (4.3 in)
92 mm (3.6 in)
104 mm (4.1 in)
Monthly rainy days
20 days
21 days
23 days
Weather conditions
tolerable
tolerable
unpleasant
Climate in Buncrana →

Moville

In September Moville generally has moderate temperatures with maximum daytime temperatures around 16°C (61°F), minimum nighttime temperatures around 12°C (54°F) and high monthly rainfall. So on average the conditions are unpleasant that month.

« August
September
October »
August
September
October
Max temperature
17°C (63°F)
16°C (61°F)
14°C (57°F)
Min temperature
13°C (55°F)
12°C (54°F)
10°C (50°F)
Monthly sun hours
140 hours
118 hours
103 hours
Monthly rainfall
118 mm (4.6 in)
111 mm (4.4 in)
136 mm (5.4 in)
Monthly rainy days
20 days
21 days
23 days
Weather conditions
unpleasant
unpleasant
unpleasant
Climate in Moville →

Is your destination not in the list? Have a look at all destinations in Donegal County, in Ireland.

Popular cities in September

Day & night temperatures, rainfall and average weather in Donegal County in September.

City Weather Day temp Night temp Rainfall
Bundoran 17°C (63°F) 10°C (50°F) 105 mm (4.1 in)
Donegal 17°C (63°F) 10°C (50°F) 107 mm (4.2 in)
Letterkenny 17°C (63°F) 10°C (50°F) 99 mm (3.9 in)
Buncrana 17°C (63°F) 11°C (52°F) 92 mm (3.6 in)
Moville 16°C (61°F) 12°C (54°F) 111 mm (4.4 in)
Ballyliffin 17°C (63°F) 12°C (54°F) 98 mm (3.9 in)

Donegal County weather in September: frequently asked questions

What is the weather like in Donegal County, Ireland in September?

In September, Donegal County, Ireland generally has unpleasant weather conditions. Bundoran sees daytime temperatures near 17°C (63°F), with nights cooling to roughly 10°C (50°F).

What is the average temperature in Donegal County, Ireland in September?

Bundoran averages a daytime maximum of 17°C (63°F) in September, with overnight lows close to 10°C (50°F).

Does Donegal County, Ireland get a lot of rain in September?

Bundoran typically receives notable rainfall in September, about 105 mm (4.1 in) on average across Donegal County, Ireland.

Is September a Good Time to Visit Donegal County, Ireland?

In our view, September might not be the best time to travel to Donegal County, Ireland with often unpleasant weather in Bundoran.

On average, the best time to visit Donegal County, Ireland is in June, July and August with generally tolerable weather in Bundoran. On the other hand, the weather in January, February, March, November and December tend to be poor.

Interested in more climate information?

We have much more information about the climate in Donegal County.

Weather and climate has detailed information for every country in the world. Are you going to Ireland? Get detailed historical weather averages for many cities in Ireland.

Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal travel conditions. Find out where to go with our weather planner.

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