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Weather in Irvine for September 2026

Your guide to Irvine weather in September - trends and predictions

    Temperatures

  • Until now, September 2026 in Irvine has been nearly identical to the historical average, with a temperature of 15.1 °C (showing only a slight deviation of 0.3 °C).

  • The forecast for the next days in Irvine predicts temperatures to be around 17 °C, close to the historical average.

  • In general, the average temperature in Irvine at the beginning of September is 16.4 °C. As the month progressed, temperatures tended to moderately rise, reaching an average of 18.3 °C by the end of September.

    • Rain 🌧️

  • Irvine in September brings notable rainfall, with an average of 20 rainy days and a total precipitation of 104.5 mm.

    • More

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
10
Dry days
Average rainy days
20
Rainy days
Average snowy days
0
Snow days
Average temperatures
14°/7°
Temperatures
Average wind speed
20 km/h
Avg max wind
Average humidity
85 %
Avg humidity

Irvine Weather September

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

Temperatures trend during September in Irvine

See the weather trend as well as the moving average line

September weather in Irvine day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Overcast
Overcast
 16° /9° 8.3 mm 3
2 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 17° /10° 5.6 mm 3
3 Sept. Moderate rain at times
Moderate rain at times
 13° /9° 9.7 mm 2
4 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 15° /8° 5.5 mm 3
5 Sept. Overcast
Overcast
 16° /9° 0.7 mm 3
6 Sept. Partly cloudy
Partly cloudy
 19° /11° 0.7 mm 4
7 Sept. Light rain shower
Light rain shower
 19° /11° 4.5 mm 4
8 Sept. Patchy rain possible
Patchy rain possible
 17° /8° 2.2 mm 3
9 Sept. Heavy rain at times
Heavy rain at times
 14° /8° 2.3 mm 3
10 Sept. Patchy rain possible
Patchy rain possible
 14° /8° 9.7 mm 2
11 Sept. Overcast
Overcast
 13° /7° 2.6 mm 2
12 Sept. Patchy rain possible
Patchy rain possible
 14° /8° 7.7 mm 2
13 Sept. Patchy rain possible
Patchy rain possible
 13° /6° 1.9 mm 2
14 Sept. Moderate rain at times
Moderate rain at times
 16° /9° 5.6 mm 3
15 Sept. Patchy rain possible
Patchy rain possible
 15° /9° 12.3 mm 3
16 Sept. Cloudy
Cloudy
 15° /8° 1.7 mm 2
17 Sept. Partly cloudy
Partly cloudy
 15° /9° 3.1 mm 3
18 Sept. Sunny
Sunny
 17° /10° 4 mm 3
19 Sept. Sunny
Sunny
 16° /9° 2.5 mm 3
20 Sept. Patchy rain possible
Patchy rain possible
 14° /10° 1.7 mm 2.8
21 Sept. Patchy rain possible
Patchy rain possible
 18° /10° 1.1 mm 2.6
22 Sept. Mist
Mist
 18° /12° 0.4 mm 2.2
23 Sept. Patchy rain possible
Patchy rain possible
 13° /8° 15.3 mm 2.3
24 Sept. Overcast
Overcast
 15° /7° 0 mm 4
25 Sept. Sunny
Sunny
 18° /9° 0 mm 5
26 Sept. Overcast
Overcast
 16° /10° 0 mm 5
27 Sept. Overcast
Overcast
 17° /9° 0 mm 4
28 Sept. Sunny
Sunny
 21° /10° 0 mm 6
29 Sept. Overcast
Overcast
 20° /13° 0 mm 5
30 Sept. Sunny
Sunny
 21° /12° 0 mm 5
Next
Important Notice
Our weather forecast for Irvine 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 Irvine forecast closer to your planned date for the most up-to-date weather information.
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Irvine in September - FAQ

What are the expected maximum and minimum temperatures in Irvine during September?
During September, expect a variety of temperatures with highs around 14° and lows near 7°, suitable for diverse activities and preferences.

How much rainfall should be expected in Irvine during September?
Significant rainfall exceeding 104.5 mm is expected in Irvine during September, occurring over more than 20 days. Preparing for wet conditions is recommended in your planning.

What are the typical wind conditions in Irvine during September?
The average wind speed in Irvine during September is 20 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in Irvine

Explore the daily rainfall trends and prepare for Irvines September weather 💧
Typically, Irvine has 20 rainy days in September with a total of 104.5 mm of rainfall.

UV exposure in Irvine during September

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

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Location coordinates Where is Irvine?

Get accurate weather forecasts for Irvine, located at latitude 55.619 and longitude -4.655. Stay updated with localized weather information tailored for Irvine.

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