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Plymouth Weather by Month
Average temperatures, rainfall and humidity for Plymouth, United Kingdom, month by month, built from OpenWeather's historical records. Use it to see what a typical Plymouth month looks like before you travel — then check the live Plymouth forecast for the days ahead.
Warmest month
July
21°C average high
Coolest month
January
4°C average low
Wettest month
February
176 mm of rain
Driest month
July
50 mm of rain
Average temperature and rainfall in Plymouth by month
Averages of the daily highs and lows recorded in each month, with total rainfall, mean humidity and mean wind speed.
| Month | Avg high | Avg low | Record low / high | Rainfall | Humidity | Wind |
|---|---|---|---|---|---|---|
| January | 9°C | 4°C | -6°C / 14°C | 115 mm | 89% | 17 km/h |
| February | 9°C | 5°C | -6°C / 14°C | 176 mm | 88% | 19 km/h |
| March | 11°C | 5°C | -5°C / 19°C | 100 mm | 85% | 16 km/h |
| April | 13°C | 6°C | -2°C / 24°C | 62 mm | 80% | 14 km/h |
| May | 16°C | 9°C | 0°C / 30°C | 57 mm | 81% | 12 km/h |
| June | 19°C | 12°C | 6°C / 35°C | 59 mm | 81% | 12 km/h |
| July | 21°C | 14°C | 8°C / 34°C | 50 mm | 81% | 12 km/h |
| August | 20°C | 14°C | 5°C / 33°C | 74 mm | 84% | 12 km/h |
| September | 18°C | 12°C | 1°C / 29°C | 60 mm | 86% | 13 km/h |
| October | 15°C | 10°C | -4°C / 24°C | 107 mm | 89% | 15 km/h |
| November | 12°C | 7°C | -5°C / 17°C | 114 mm | 90% | 17 km/h |
| December | 10°C | 6°C | -4°C / 14°C | 98 mm | 89% | 18 km/h |
Best time to visit Plymouth
The most comfortable time to visit Plymouth is generally June to August, balancing mild daytime temperatures against the driest stretch of the year. The city has a moderate seasonal swing and rain concentrates around February, totalling about 1073 mm a year.
Travellers who prefer heat should aim for July, when highs average 21°C. February is the month to avoid if rain would spoil your plans — it averages 176 mm, roughly 4× the rainfall of July.
Source: OpenWeather historical and statistical weather data. Values are long-term averages, not a forecast — see the Plymouth forecast for what is happening now.