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Weather in Portrush for September 2026

Your guide to Portrush weather in September - trends and predictions

    Temperatures

  • Until now, September 2026 in Portrush has been nearly identical to the historical average, with a temperature of 15.6 °C (showing only a slight deviation of 0.1 °C).

  • The forecast for the next days in Portrush predicts temperatures to be around 16 °C, close to the historical average.

  • In general, the average temperature in Portrush at the beginning of September is 16 °C. As the month progressed, temperatures tended to slightly increase, reaching an average of 16.4 °C by the end of September.

    • Rain 🌧️

  • Portrush experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 102.4 mm.

    • More

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Average dry days
8
Dry days
Average rainy days
22
Rainy days
Average snowy days
0
Snow days
Average temperatures
14°/10°
Temperatures
Average wind speed
28 km/h
Avg max wind
Average humidity
80 %
Avg humidity

Portrush Weather September

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

Temperatures trend during September in Portrush

See the weather trend as well as the moving average line

September weather in Portrush 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
 16° /12° 6.3 mm 3
2 Sept. Moderate rain at times
Moderate rain at times
 16° /11° 2.4 mm 3
3 Sept. Moderate rain at times
Moderate rain at times
 15° /11° 4.1 mm 2
4 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 15° /11° 4.2 mm 3
5 Sept. Patchy rain possible
Patchy rain possible
 15° /11° 0.3 mm 3
6 Sept. Sunny
Sunny
 18° /13° 0.6 mm 3
7 Sept. Sunny
Sunny
 17° /12° 2.3 mm 4
8 Sept. Patchy rain possible
Patchy rain possible
 14° /11° 1.8 mm 3
9 Sept. Moderate rain at times
Moderate rain at times
 15° /11° 1.7 mm 3
10 Sept. Patchy rain possible
Patchy rain possible
 15° /10° 5.9 mm 2
11 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 14° /11° 10.2 mm 2
12 Sept. Patchy rain possible
Patchy rain possible
 14° /10° 7.3 mm 2
13 Sept. Heavy rain at times
Heavy rain at times
 14° /8° 2.1 mm 2
14 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 16° /11° 7.7 mm 3
15 Sept. Moderate rain at times
Moderate rain at times
 16° /11° 5.4 mm 3
16 Sept. Overcast
Overcast
 15° /11° 3.2 mm 2
17 Sept. Patchy rain possible
Patchy rain possible
 17° /12° 4.4 mm 3
18 Sept. Sunny
Sunny
 17° /11° 2.4 mm 3
19 Sept. Sunny
Sunny
 17° /10° 0.1 mm 5
20 Sept. Patchy rain possible
Patchy rain possible
 14° /13° 0.8 mm 2.7
21 Sept. Sunny
Sunny
 19° /12° 4.7 mm 3
22 Sept. Light rain shower
Light rain shower
 16° /13° 4.6 mm 1.1
23 Sept. Patchy rain possible
Patchy rain possible
 13° /11° 17.6 mm 2.3
24 Sept. Overcast
Overcast
 16° /10° 0 mm 4
25 Sept. Patchy rain possible
Patchy rain possible
 15° /13° 5.2 mm 4
26 Sept. Patchy rain possible
Patchy rain possible
 14° /12° 4 mm 4
27 Sept. Overcast
Overcast
 16° /13° 0 mm 4
28 Sept. Sunny
Sunny
 18° /12° 0 mm 5
29 Sept. Sunny
Sunny
 18° /14° 0 mm 5
30 Sept. Sunny
Sunny
 18° /14° 0 mm 5
Next
Important Notice
Our weather forecast for Portrush 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 Portrush forecast closer to your planned date for the most up-to-date weather information.
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Portrush in September - FAQ

What are the expected maximum and minimum temperatures in Portrush during September?
During September, expect a variety of temperatures with highs around 14° and lows near 10°, suitable for diverse activities and preferences.

How much rainfall should be expected in Portrush during September?
Significant rainfall exceeding 102.4 mm is expected in Portrush during September, occurring over more than 22 days. Preparing for wet conditions is recommended in your planning.

What are the typical wind conditions in Portrush during September?
The average wind speed in Portrush during September is 28 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in Portrush

Explore the daily rainfall trends and prepare for Portrushs September weather 💧
Typically, Portrush has 22 rainy days in September with a total of 102.4 mm of rainfall.

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Location coordinates Where is Portrush?

Get accurate weather forecasts for Portrush, located at latitude 55.196 and longitude -6.649. Stay updated with localized weather information tailored for Portrush.

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