Climate graph Portsmouth
The driest month is July, with 48 mm of rainfall. Most of the precipitation here falls in December, averaging 92 mm.
Temperature graph Portsmouth
The warmest month of the year is July, with an average temperature of 17.3 °C. January is the coldest month, with temperatures averaging 4.0 °C.
Climate table // historical Weather data Portsmouth
The difference in precipitation between the driest month and the wettest month is 44 mm. Throughout the year, temperatures vary by 13.3 °C. Useful hints about reading the climate table: For every month, you will find data about precipitation (mm), average, maximum and minimum temperature (degrees Celcius and Fahrenheit). Meaning of the first line: (1) January, (2) February, (3) March, (4) April, (5) May, (6) June, (7) July, (8) August, (9) September, (10) October, (11) November, (12) December.