The temperatures in Plymouth in September are comfortable with low of 17°C and and high up to 20°C.
You can expect about 3 to 8 days of rain in Plymouth during the month of September. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Our weather forecast can give you a great sense of what weather to expect in Plymouth in September 2025.
If you’re planning to visit Plymouth in the near future, we highly recommend that you review the 14 day weather forecast for Plymouth before you arrive.
Temperatures
20° / 17°
Rainy Days
4
Snowy Days
0
Dry Days
26
Rainfall
79
mm
Sun Hours
10.2
Hrs
