Plymouth’s climate is strongly moderated by the warm current in the sea and temperatures are higher here on average. You can expect the temperature to remain pleasant until late autumn.
Plymouth does also see a bit of drizzle from time to time and it can rain for long periods of time but heavy rain is uncommon.
A rainy day in Plymouth can often change suddenly into a lovely and sunny afternoon.
Please see below a 7-day weather forecast for Plymouth by the Met Office: