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Weather in Saint Peter Port for September 2025

Your guide to Saint Peter Port weather in September - trends and predictions

    Temperatures

  • Until now, September 2025 in Saint Peter Port is slightly cooler than the historical average by -0.7 °C.

  • Expect cooler weather in the next days in Saint Peter Port with the forecast suggesting a temperature of 16.4 °C, lower than the historical average.

  • In general, the average temperature in Saint Peter Port at the beginning of September is 18.6 °C. As the month progressed, temperatures tended to moderately fall, reaching an average of 16.6 °C by the end of September.

    • Rain 🌧️

  • Saint Peter Port in September brings notable rainfall, with an average of 17 rainy days and a total precipitation of 79 mm.

Average dry days
13
Dry days
Average rainy days
17
Rainy days
Average snowy days
0
Snow days
Average temperatures
18°/16°
Temperatures
Average wind speed
34 km/h
Avg max wind
Average humidity
79 %
Avg humidity

Saint Peter Port Weather September

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

Temperatures trend during September in Saint Peter Port

See the weather trend as well as the moving average line

September weather in Saint Peter Port 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
 17° /16° 7.6 mm 4
2 Sept. Partly cloudy
Partly cloudy
 18° /15° 3.9 mm 4
3 Sept. Sunny
Sunny
 19° /16° 1.6 mm 4
4 Sept. Sunny
Sunny
 18° /16° 1.5 mm 5
5 Sept. Sunny
Sunny
 19° /16° 0.6 mm 5
6 Sept. Patchy rain possible
Patchy rain possible
 20° /16° 0.6 mm 5
7 Sept. Light rain shower
Light rain shower
 19° /16° 5.4 mm 4
8 Sept. Partly cloudy
Partly cloudy
 19° /16° 3.4 mm 5
9 Sept. Patchy rain possible
Patchy rain possible
 19° /16° 2.1 mm 4
10 Sept. Light rain shower
Light rain shower
 18° /16° 2.5 mm 4
11 Sept. Partly cloudy
Partly cloudy
 17° /15° 2.1 mm 4
12 Sept. Cloudy
Cloudy
 16° /14° 2.7 mm 4
13 Sept. Overcast
Overcast
 16° /14° 1.4 mm 4
14 Sept. Partly cloudy
Partly cloudy
 17° /14° 0.5 mm 5
15 Sept. Sunny
Sunny
 18° /15° 0.4 mm 5
16 Sept. Patchy rain possible
Patchy rain possible
 16° /15° 0.2 mm 0.9
17 Sept. Cloudy
Cloudy
 17° /16° 0.1 mm 1.1
18 Sept. Patchy rain possible
Patchy rain possible
 18° /17° 0.2 mm 1.1
19 Sept. Sunny
Sunny
 20° /17° 0 mm 1
20 Sept. Patchy rain possible
Patchy rain possible
 17° /14° 0.1 mm 0.2
21 Sept. Patchy rain possible
Patchy rain possible
 14° /13° 0.6 mm 3
22 Sept. Patchy rain possible
Patchy rain possible
 14° /12° 0.4 mm 3
23 Sept. Patchy rain possible
Patchy rain possible
 14° /13° 0.2 mm 3
24 Sept. Patchy rain possible
Patchy rain possible
 15° /13° 1.7 mm 3
25 Sept. Patchy rain possible
Patchy rain possible
 16° /14° 0.6 mm 4
26 Sept. Partly cloudy
Partly cloudy
 16° /15° 0.1 mm 5
27 Sept. Patchy rain possible
Patchy rain possible
 17° /15° 0.1 mm 4
28 Sept. Patchy rain possible
Patchy rain possible
 17° /15° 0.2 mm 4
29 Sept. Sunny
Sunny
 18° /15° 0 mm 5
30 Sept. Partly cloudy
Partly cloudy
 17° /14° 1.5 mm 5
Next
Important Notice
Our weather forecast for Saint Peter Port 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 Saint Peter Port forecast closer to your planned date for the most up-to-date weather information.
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Saint Peter Port in September - FAQ

What are the expected maximum and minimum temperatures in Saint Peter Port during September?
During September, expect a variety of temperatures with highs around 18° and lows near 16°, suitable for diverse activities and preferences.
How much rainfall should be expected in Saint Peter Port during September?
Moderate rainfall is anticipated in Saint Peter Port during September, with a total of 79 mm spread over approximately 17 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Saint Peter Port during September?
The average wind speed in Saint Peter Port during September is 34 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in Saint Peter Port

Explore the daily rainfall trends and prepare for Saint Peter Ports September weather 💧

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Location coordinates Where is Saint Peter Port?

Get accurate weather forecasts for Saint Peter Port, located at latitude 49.46 and longitude -2.535. Stay updated with localized weather information tailored for Saint Peter Port.

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