Norwich, where it's located

The climate of Norwich is oceanic, with quite cold, rainy winters and mild, relatively rainy summers.
The city is located in the east of England, in Norfolk, about 30 km (18 mi) from the North Sea coast.
The average temperature of the coldest months (January, February) is of 4.4 °C (40 °F), that of the warmest months (July, August) is of 16.9 °C (62 °F). Here are the average temperatures.
Norwich - Average temperatures
Min (°C)2134810121210842
Max (°C)771012161921211915108
Min (°F)363437394650545450463936
Max (°F)454550546166707066595046

Precipitation amounts to 675 millimeters (26.6 inches) per year: so, it is at an intermediate level. It ranges from 40 mm (1.6 in) in the driest month (February) to 70 mm (2.8 in) in the wettest ones (October, November). Here is the average precipitation.
Norwich - Average precipitation

On average, there are around 1,675 sunshine hours per year. Here are the average sunshine hours per day.
Norwich - Sunshine

On the coast (see Great Yarmouth, Lowestoft), the sea temperature ranges between 7 °C (45 °F) and 17 °C (63 °F). So, it never becomes warm for swimming. Here are the average sea temperatures.
Lowestoft - Sea temperature
Temp (°C)8778101316171715129
Temp (°F)464545465055616363595448


Best Time

The best time to visit Norwich 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.