Click on a day for an hourly weather forecast
The weather in Plymouth in August is hot. The average temperatures are between 20°C and 23°C.
You can expect about 3 to 8 days of rain in Plymouth during the month of August. 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 August 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.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 3° / -2° | 6 | 18 | 8 | 92 mm | Awful | Plymouth in January |
| February | 3° / -1° | 6 | 15 | 8 | 91 mm | Awful | Plymouth in February |
| March | 5° / 1° | 6 | 19 | 6 | 94 mm | Awful | Plymouth in March |
| April | 10° / 6° | 6 | 22 | 1 | 86 mm | Ok | Plymouth in April |
| May | 14° / 11° | 6 | 25 | 0 | 89 mm | Good | Plymouth in May |
| June | 19° / 15° | 6 | 24 | 0 | 94 mm | Good | Plymouth in June |
| July | 23° / 20° | 6 | 25 | 0 | 118 mm | Perfect | Plymouth in July |
| August | 23° / 20° | 4 | 27 | 0 | 102 mm | Perfect | Plymouth in August |
| September | 20° / 17° | 4 | 26 | 0 | 79 mm | Good | Plymouth in September |
| October | 16° / 12° | 6 | 25 | 0 | 107 mm | Good | Plymouth in October |
| November | 10° / 7° | 5 | 24 | 1 | 72 mm | Ok | Plymouth in November |
| December | 6° / 2° | 7 | 20 | 5 | 91 mm | Awful | Plymouth in December |