Plymouth, where it's located

The climate of Plymouth is oceanic, with quite cold, rainy winters and mild, relatively rainy summers.
The city is located in the south-west of England, in Devon, in the area that in winter is the mildest of the country. Not surprisingly, snow is very rare, and even when it snows, only a few centimeters (1 inch = 2.54 cm) generally accumulate on the ground.
The average temperature of the coldest months (January, February) is of 6.5 °C (44 °F), that of the warmest months (July, August) is of 16.5 °C (62 °F). The lowest record is -8.8 °C (16.2 °F), recorded in January 1979, the highest is 31.6 °C (89 °F), recorded in June 1976. Here are the average temperatures.
Plymouth - Average temperatures
Min (°C)4456911131312965
Max (°C)9911131618202018151210
Min (°F)393941434852555554484341
Max (°F)484852556164686864595450

Precipitation amounts to 1,005 millimeters (39.6 inches) per year: so, it is at an intermediate level. It ranges from 55 mm (2.2 in) in the driest month (June) to 120 mm (4.7 in) in the wettest (December). Here is the average precipitation.
Plymouth - Average precipitation

On average, there are around 1,730 sunshine hours per year. Here are the average sunshine hours per day.
Plymouth - Sunshine

The sea temperature ranges between 9 °C (48 °F) and 17 °C (63 °F). So, it never becomes warm for swimming. Here are the average sea temperatures.
Plymouth - Sea temperature
Temp (°C)1099101114161716151312
Temp (°F)504848505257616361595554


Best Time

The best time to visit Plymouth is the summer, or more generally from mid-May to mid-September: temperatures are generally good for outdoors activities, although it's better to bring an umbrella, and a sweatshirt or sweater for the evening or for cool days.