Westport

Mayo Weather in September

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

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Westport Cong Castlebar Ballina

Are you planning a trip a to Mayo, Ireland in September and wondering what kind of weather to expect? This page has all the details you need.

What to Expect in Mayo in September

Mayo, Ireland is a region in Ireland. September in Mayo 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 Westport.

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

Precipitation

In September, precipitation varies across different areas. From moderate rainfall in Claremorris with an average of 86 mm (3.4 in) to high rainfall in Louisburgh with 127 mm (5 in).

Average sunshine

Sunshine is quite limited in many locations during September. Westport receives roughly 93 hours of sunlight. For destinations with more sunshine, our weather planner offers alternatives worldwide.

Explore Mayo by month

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

Best Places to Visit in Mayo in September

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

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 Mayo

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

Temperature range in Mayo (September)

Precipitation variation in Mayo (September)

Westport

In September Westport 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 sun hours
118 hours
93 hours
74 hours
Monthly rainfall
112 mm (4.4 in)
101 mm (4 in)
123 mm (4.8 in)
Monthly rainy days
21 days
21 days
23 days
Weather conditions
tolerable
unpleasant
unpleasant
Climate in Westport →

Cong

In September Cong generally has moderate temperatures with maximum daytime temperatures around 18°C (64°F), minimum nighttime temperatures around 10°C (50°F) and moderate monthly rainfall. So on average the conditions are pleasant that month.

« August
September
October »
August
September
October
Max temperature
19°C (66°F)
18°C (64°F)
14°C (57°F)
Min temperature
11°C (52°F)
10°C (50°F)
7°C (45°F)
Monthly sun hours
118 hours
93 hours
74 hours
Monthly rainfall
110 mm (4.3 in)
95 mm (3.7 in)
115 mm (4.5 in)
Monthly rainy days
20 days
20 days
22 days
Weather conditions
tolerable
pleasant
unpleasant
Climate in Cong →

Castlebar

In September Castlebar 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
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 sun hours
118 hours
93 hours
74 hours
Monthly rainfall
107 mm (4.2 in)
94 mm (3.7 in)
114 mm (4.5 in)
Monthly rainy days
20 days
21 days
23 days
Weather conditions
tolerable
tolerable
unpleasant
Climate in Castlebar →

Ballina

In September Ballina generally has moderate temperatures with maximum daytime temperatures around 17°C (63°F), minimum nighttime temperatures around 11°C (52°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
12°C (54°F)
11°C (52°F)
8°C (46°F)
Monthly sun hours
118 hours
93 hours
74 hours
Monthly rainfall
115 mm (4.5 in)
104 mm (4.1 in)
126 mm (5 in)
Monthly rainy days
20 days
21 days
23 days
Weather conditions
tolerable
unpleasant
unpleasant
Climate in Ballina →

Belmullet

In September Belmullet generally has moderate temperatures with maximum daytime temperatures around 17°C (63°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
18°C (64°F)
17°C (63°F)
14°C (57°F)
Min temperature
13°C (55°F)
12°C (54°F)
10°C (50°F)
Monthly sun hours
142 hours
118 hours
90 hours
Monthly rainfall
109 mm (4.3 in)
110 mm (4.3 in)
138 mm (5.4 in)
Monthly rainy days
21 days
22 days
24 days
Weather conditions
tolerable
unpleasant
unpleasant
Climate in Belmullet →

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

Popular cities in September

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

City Weather Day temp Night temp Rainfall
Westport 17°C (63°F) 10°C (50°F) 101 mm (4 in)
Cong 18°C (64°F) 10°C (50°F) 95 mm (3.7 in)
Castlebar 17°C (63°F) 10°C (50°F) 94 mm (3.7 in)
Ballina 17°C (63°F) 11°C (52°F) 104 mm (4.1 in)
Belmullet 17°C (63°F) 12°C (54°F) 110 mm (4.3 in)
Keel 17°C (63°F) 12°C (54°F) 116 mm (4.6 in)

Mayo weather in September: frequently asked questions

What is the weather like in Mayo, Ireland in September?

Mayo, Ireland typically experiences unpleasant weather in September, part of the season. Daytime highs in Westport average around 17°C (63°F), and temperatures drop to about 10°C (50°F) at night.

What is the average temperature in Mayo, Ireland in September?

Average temperatures in Mayo, Ireland during September range from a nighttime low near 10°C (50°F) to a daytime high around 17°C (63°F) in Westport.

Does Mayo, Ireland get a lot of rain in September?

Westport typically receives notable rainfall in September, about 101 mm (4 in) on average across Mayo, Ireland.

Is September a Good Time to Visit Mayo, Ireland?

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

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

Interested in more climate information?

We have much more information about the climate in Mayo.

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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