The climate in Portsmouth during January can be summarized as hot, humid and wet.
January is in the winter in Portsmouth and is typically the 2nd coldest month of the year. Daytime maximum temperatures average around a muggy 28°C (83°F), whilst at night 21°C (70°F) is normal.
|Daytime temperature||28.4°C 83.1°F|
|Nightly temperature||21.2°C 70.2°F|
|Average temperature||24.8°C 76.6°F|
|Daily sunshine||7.2 hrs|
|Avg rainfall||145 mm 5.7 ins|
|Rainy days||18 days|
|Sea temperature||26.9°C 80.4°F|
|Windspeed||17.6kph 11 mph|
On average January is the 4th driest month of the year in Portsmouth with around 145mm 5.7 inches of rain making it a wet time to visit. This rainfall is typically spread over 18 days, although this may vary considerably.
On the flip side this corresponds to an average of 7.2 hours of sunshine per day.
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Portsmouth in January 2023.
Best places to visit in January
|Hottest month:||July||30.6°C 87.1°F|
|Driest month:||February||95mm 3.7ins|
|Coldest month:||February||28.3°C 82.9°F|
|Wettest month:||November||301mm 11.9ins|