Weather in September
Temperature
The transition into September in Galway reveals an average high-temperature of a still refreshing 17.3°C (63.1°F), mirroring a close resemblance to August. During the month of September, Galway's nighttime temperature lowers to an average of 10.4°C (50.7°F).Rainfall
In Galway, during September, the rain falls for 20 days and regularly aggregates up to 93mm (3.66") of precipitation. Throughout the year, in Galway, there are 232 rainfall days, and 1156mm (45.51") of precipitation is accumulated.Sea temperature
In September, the average sea temperature is 14.8°C (58.6°F).Note: Engaging in a swim in 14.8°C (58.6°F) can threaten life. Brief exposure to 13°C (55.4°F) waters is uneasy, and submersion below 10°C (50°F) can lead to cold shock and disrupted breathing patterns, varying by individual.
Daylight
In September, the average length of the day in Galway is 12h and 40min.On the first day of September in Galway, sunrise is at 6:46 am and sunset at 8:25 pm. On the last day of the month, sunrise is at 7:37 am and sunset at 7:15 pm IST.
Sunshine
In September, the average sunshine is 3h.UV index
The average daily maximum UV index in September in Galway is 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for the average person.Note: In September, the maximum UV index of 4 suggests this advice:
Exercise caution. The susceptibility of light skin individuals to burns is less than 30 minutes. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes.
Frequently asked questions
What are the temperatures in Galway in September?
How much does it rain in Galway in September?
What is the sea water temperature in September in Galway?
What is the average length of the day in September in Galway?
When are sunrise and sunset in September in Galway?
How long on average sun shines in September in Galway?
What is the UV index intensity in September in Galway?
Average temperature in September
Galway, Ireland
- Average high temperature in September: 17.3°C
The warmest month (with the highest average high temperature) is July (20.5°C).
The month with the lowest average high temperature is January (8.7°C).
- Average low temperature in September: 10.4°C
The month with the highest average low temperature is July (12.9°C).
The coldest month (with the lowest average low temperature) is January (3.5°C).
Average rainfall in September
Galway, Ireland
- Average rainfall in September: 93mm
The wettest month (with the highest rainfall) is October (130mm).
The driest month (with the least rainfall) is April (61mm).
Average rainfall days in September
Galway, Ireland
- Average rainfall days in September: 20 days
The months with the highest number of rainy days are January and December (22 days).
The months with the least rainy days are April and July (16 days).
Average sea temperature in September
Galway, Ireland
- Average sea temperature in September: 14.8°C
The best month for swimming (with the highest average sea temperature) is August (15.4°C).
The coldest month (with the lowest average sea temperature) is March (9.5°C).
Average daylight in September /
Average sunshine in September
Galway, Ireland
- Average daylight in September: 12h and 4min
The month with the longest days is June (Average daylight: 16h and 54min).
The month with the shortest days is December (Average daylight: 7h and 36min).
- Average sunshine in September: 3h
The month with the most sunshine is May (Average sunshine: 6h).
The month with the least sunshine is December (Average sunshine: 1h).
Average UV index in September
Galway, Ireland
- Average UV index in September: 4
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January and December (UV index 0).
Galway, Ireland
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