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Weather in Falmouth for September 2025

Your guide to Falmouth weather in September - trends and predictions

    Temperatures

  • Until now, September 2025 in Falmouth has been nearly identical to the historical average, with a temperature of 16.8 °C (showing only a slight deviation of 0.1 °C).

  • Expect cooler weather in the next days in Falmouth with the forecast suggesting a temperature of 15.5 °C, lower than the historical average.

  • In general, the average temperature in Falmouth at the beginning of September is 17.6 °C. As the month progressed, temperatures tended to noticeably cool down, reaching an average of 14.9 °C by the end of September.

    • Rain 🌧️

  • Falmouth experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 118.8 mm.

    • More

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

Average dry days
9
Dry days
Average rainy days
21
Rainy days
Average snowy days
0
Snow days
Average temperatures
16°/12°
Temperatures
Average wind speed
28 km/h
Avg max wind
Average humidity
80 %
Avg humidity

Falmouth 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
Light rain shower
18°
3
Light rain shower
18°
4
Patchy rain possible
17°
5
Patchy rain possible
18°
6
Overcast
18°
7
Light rain shower
17°
8
Patchy rain possible
17°
9
Partly cloudy
16°
10
Moderate or heavy rain shower
17°
11
Patchy rain possible
15°
12
Patchy rain possible
14°
13
Patchy rain possible
15°
14
Sunny
16°
15
Patchy rain possible
16°
16
Patchy rain possible
16°
17
Patchy rain possible
18°
18
Partly cloudy
19°
19
Partly cloudy
19°
20
Heavy rain
16°
21
Patchy rain possible
13°
22
Patchy rain possible
13°
23
Patchy rain possible
14°
24
Patchy rain possible
15°
25
Cloudy
15°
26
Moderate rain
14°
27
Patchy rain possible
15°
28
Cloudy
15°
29
Sunny
15°
30
Patchy rain possible
15°

Temperatures trend during September in Falmouth

See the weather trend as well as the moving average line

September weather in Falmouth 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° /14° 8 mm 4
2 Sept. Light rain shower
Light rain shower
 18° /14° 21.7 mm 4
3 Sept. Light rain shower
Light rain shower
 18° /14° 8.9 mm 4
4 Sept. Patchy rain possible
Patchy rain possible
 17° /13° 12.8 mm 4
5 Sept. Patchy rain possible
Patchy rain possible
 18° /13° 0 mm 4
6 Sept. Overcast
Overcast
 18° /14° 0.1 mm 4
7 Sept. Light rain shower
Light rain shower
 17° /12° 3.8 mm 4
8 Sept. Patchy rain possible
Patchy rain possible
 17° /12° 0.8 mm 4
9 Sept. Partly cloudy
Partly cloudy
 16° /13° 10.8 mm 5
10 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 17° /13° 4.2 mm 4
11 Sept. Patchy rain possible
Patchy rain possible
 15° /12° 1.8 mm 4
12 Sept. Patchy rain possible
Patchy rain possible
 14° /10° 4.3 mm 4
13 Sept. Patchy rain possible
Patchy rain possible
 15° /10° 3.2 mm 4
14 Sept. Sunny
Sunny
 16° /10° 2.5 mm 5
15 Sept. Patchy rain possible
Patchy rain possible
 16° /13° 0.5 mm 4
16 Sept. Patchy rain possible
Patchy rain possible
 16° /14° 0.6 mm 0.8
17 Sept. Patchy rain possible
Patchy rain possible
 18° /15° 2.1 mm 0.5
18 Sept. Partly cloudy
Partly cloudy
 19° /15° 0.1 mm 1
19 Sept. Partly cloudy
Partly cloudy
 19° /15° 0 mm 0.8
20 Sept. Heavy rain
Heavy rain
 16° /13° 24.4 mm 0.7
21 Sept. Patchy rain possible
Patchy rain possible
 13° /10° 2.7 mm 3
22 Sept. Patchy rain possible
Patchy rain possible
 13° /11° 0.5 mm 3
23 Sept. Patchy rain possible
Patchy rain possible
 14° /10° 0.3 mm 3
24 Sept. Patchy rain possible
Patchy rain possible
 15° /12° 0.4 mm 3
25 Sept. Cloudy
Cloudy
 15° /11° 0 mm 3
26 Sept. Moderate rain
Moderate rain
 14° /11° 10.8 mm 3
27 Sept. Patchy rain possible
Patchy rain possible
 15° /11° 0.8 mm 3
28 Sept. Cloudy
Cloudy
 15° /12° 0 mm 3
29 Sept. Sunny
Sunny
 15° /10° 0 mm 4
30 Sept. Patchy rain possible
Patchy rain possible
 15° /12° 1 mm 4
Next
Important Notice
Our weather forecast for Falmouth 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 Falmouth forecast closer to your planned date for the most up-to-date weather information.
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Falmouth in September - FAQ

What are the expected maximum and minimum temperatures in Falmouth during September?
Enjoy moderate daytime temperatures of up to 16° and cooler nights around 12°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Falmouth during September?
Significant rainfall exceeding 118.8 mm is expected in Falmouth during September, occurring over more than 21 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Falmouth during September?
The average wind speed in Falmouth during September is 28 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in Falmouth

Explore the daily rainfall trends and prepare for Falmouths September weather 💧

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