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Weather in Galway for September 2026

Your guide to Galway weather in September - trends and predictions

    Temperatures

  • In general, the average temperature in Galway at the beginning of September is 18.3 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 14.6 °C by the end of September.

    • Rain 🌧️

  • Galway experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 104.6 mm.

Average dry days
4
Dry days
Average rainy days
26
Rainy days
Average snowy days
0
Snow days
Average temperatures
16°/10°
Temperatures
Average wind speed
28 km/h
Avg max wind
Average humidity
81 %
Avg humidity

Galway Weather September

Move between months or click on a day
August
October
Mon.Tue.Wed.Thu.Fri.Sat.Sun.
1
Light rain shower
18°
2
Patchy rain possible
16°
3
Partly cloudy
16°
4
Partly cloudy
18°
5
Patchy rain possible
19°
6
Patchy rain possible
21°
7
Partly cloudy
20°
8
Patchy rain possible
18°
9
Patchy rain possible
17°
10
Light rain shower
16°
11
Light rain shower
14°
12
Cloudy
14°
13
Overcast
14°
14
Overcast
16°
15
Overcast
15°
16
Patchy rain possible
16°
17
Light drizzle
17°
18
Light rain shower
17°
19
Light rain shower
17°
20
Light rain shower
17°
21
Patchy rain possible
15°
22
Patchy rain possible
14°
23
Patchy light drizzle
16°
24
Moderate rain
15°
25
Patchy rain possible
15°
26
Light rain shower
14°
27
Light rain shower
14°
28
Patchy rain possible
14°
29
Patchy rain possible
14°
30
Light rain
16°

Temperatures trend during September in Galway

See the weather trend as well as the moving average line

September weather in Galway day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Light rain shower
Light rain shower
 18° /12° 3.3 mm 4
2 Sept. Patchy rain possible
Patchy rain possible
 16° /11° 0.5 mm 4
3 Sept. Partly cloudy
Partly cloudy
 16° /11° 6.4 mm 4
4 Sept. Partly cloudy
Partly cloudy
 18° /11° 0.7 mm 4
5 Sept. Patchy rain possible
Patchy rain possible
 19° /11° 0.2 mm 5
6 Sept. Patchy rain possible
Patchy rain possible
 21° /13° 1.8 mm 5
7 Sept. Partly cloudy
Partly cloudy
 20° /13° 3.8 mm 5
8 Sept. Patchy rain possible
Patchy rain possible
 18° /12° 1.3 mm 4
9 Sept. Patchy rain possible
Patchy rain possible
 17° /12° 1.3 mm 4
10 Sept. Light rain shower
Light rain shower
 16° /12° 4 mm 4
11 Sept. Light rain shower
Light rain shower
 14° /10° 4.5 mm 3
12 Sept. Cloudy
Cloudy
 14° /8° 5.9 mm 3
13 Sept. Overcast
Overcast
 14° /8° 3.6 mm 3
14 Sept. Overcast
Overcast
 16° /9° 3.9 mm 4
15 Sept. Overcast
Overcast
 15° /11° 3.9 mm 3
16 Sept. Patchy rain possible
Patchy rain possible
 16° /10° 2.3 mm 4
17 Sept. Light drizzle
Light drizzle
 17° /11° 3.4 mm 4
18 Sept. Light rain shower
Light rain shower
 17° /10° 5.9 mm 4
19 Sept. Light rain shower
Light rain shower
 17° /10° 7.5 mm 5
20 Sept. Light rain shower
Light rain shower
 17° /10° 3.4 mm 4
21 Sept. Patchy rain possible
Patchy rain possible
 15° /8° 2.3 mm 3
22 Sept. Patchy rain possible
Patchy rain possible
 14° /8° 1.5 mm 4
23 Sept. Patchy light drizzle
Patchy light drizzle
 16° /7° 0.4 mm 4
24 Sept. Moderate rain
Moderate rain
 15° /9° 4.7 mm 4
25 Sept. Patchy rain possible
Patchy rain possible
 15° /9° 1 mm 4
26 Sept. Light rain shower
Light rain shower
 14° /8° 8.1 mm 4
27 Sept. Light rain shower
Light rain shower
 14° /9° 5.4 mm 3
28 Sept. Patchy rain possible
Patchy rain possible
 14° /10° 5.3 mm 3
29 Sept. Patchy rain possible
Patchy rain possible
 14° /10° 2.8 mm 4
30 Sept. Light rain
Light rain
 16° /11° 5.5 mm 4
Next
Important Notice
Our weather forecast for Galway in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Galway forecast closer to your planned date for the most up-to-date weather information.
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Galway in September - FAQ

What are the expected maximum and minimum temperatures in Galway during September?

Enjoy moderate daytime temperatures of up to 16° and cooler nights around 10°. Ideal for a range of outdoor activities, from hiking to city tours.

How much rainfall should be expected in Galway during September?

Significant rainfall exceeding 104.6 mm is expected in Galway during September, occurring over more than 26 days. Preparing for wet conditions is recommended in your planning.

What are the typical wind conditions in Galway during September?

The average wind speed in Galway during September is 28 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in Galway

Explore the daily rainfall trends and prepare for Galways September weather 💧
Typically, Galway has 26 rainy days in September with a total of 104.6 mm of rainfall.

UV exposure in Galway during September

Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️

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Location coordinates Where is Galway?

Get accurate weather forecasts for Galway, located at latitude 53.272 and longitude -9.051. Stay updated with localized weather information tailored for Galway.

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