Cool
Average highs are around 3°C, so pack for cooler days.
December verdict
Portsmouth, New Hampshire, United States in December
Weather score22Poor
Poor for holiday weather
Average highs are around 3°C, so pack for cooler days. Sunshine averages 4.4h per day, so this is not one of the brighter months. Rainfall averages 107mm, so some wet days are possible.
December weather
Monthly averages
Temp
3°C
Rain
107mm
Sun
4.4h
Sea
8°C
Weather score
22
Poor
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Showers
Rainfall averages 107mm, so some wet days are possible.
Limited sun
Sunshine averages 4.4h per day, so this is not one of the brighter months.
Cool sea
Sea temperatures average 8°C, so the water can feel cool.
Map
Weather map
Compare Portsmouth, New Hampshire, United States with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
December3°C average high
December 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
December107mm average rain
December is wetter than Portsmouth's yearly average, so flexible plans matter more.
Driest monthsJanuary to October
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
December4.4 hours average sun
December 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
December8°C average sea
December is below Portsmouth's yearly sea-temperature average, so swimming can feel fresher.
Warmest seaJuly to September
Sea temperatures are usually near 18°C in this stretch, so swimming comfort is at its strongest.
Weather score
December22 weather score
December is one of the weakest weather-score months, when the overall mix is less favourable than the rest of the year.
Best weather monthsJuly to August
These months have the strongest weather score in the monthly averages.
Hotels in Portsmouth, New Hampshire, United States
Marriott
Renaissance Portsmouth-Norfolk Waterfront HotelPortsmouth, Virginia, USA
Sheraton Portsmouth Harborside HotelPortsmouth, New Hampshire, USA
AC Hotel Portsmouth Downtown/WaterfrontPortsmouth, New Hampshire, USA
Courtyard PortsmouthPortsmouth, New Hampshire, USA
Fairfield Inn Portsmouth SeacoastPortsmouth, New Hampshire, USA
Residence Inn PortsmouthPortsmouth, New Hampshire, USA