Cool
Average highs are around 7°C, so pack for cooler days.
January verdict
Portsmouth, England, United Kingdom in January
Weather score16Poor
Poor for holiday weather
Average highs are around 7°C, so pack for cooler days. Sunshine averages 1.8h per day, so this is not one of the brighter months. Rainfall averages 85mm, so some wet days are possible.
January weather
Monthly averages
Temp
7°C
Rain
85mm
Sun
1.8h
Sea
9°C
Weather score
16
Poor
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Showers
Rainfall averages 85mm, so some wet days are possible.
Limited sun
Sunshine averages 1.8h per day, so this is not one of the brighter months.
Cool sea
Sea temperatures average 9°C, so the water can feel cool.
Map
Weather map
Compare Portsmouth, England, United Kingdom with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
January7°C average high
January has some of the coolest average daytime highs of the year, so pack for fresher conditions.
Warmest monthsJune to September
This stretch sets the upper range for average daytime heat.
Rain
January85mm average rain
January is one of Portsmouth's wettest months, so rain is likely to be a major planning factor.
Driest monthsFebruary to September
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
January1.8 hours average sun
January is one of Portsmouth's cloudier months, so sunshine-led plans are less reliable.
Brightest monthsMay to August
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
January9°C average sea
January is one of the coolest sea months, so the water may feel fresher than in peak months.
Warmest seaJuly to October
Sea temperatures are usually near 17°C in this stretch, so swimming comfort is at its strongest.
Weather score
January16 weather score
January is one of the weakest weather-score months, when the overall mix is less favourable than the rest of the year.
Best weather monthsJune to August
These months have the strongest weather score in the monthly averages.
