Cool
Average highs are around 20°C, so pack for cooler days.
May verdict
Portsmouth, New Hampshire, United States in May
Weather score38Poor
Poor for holiday weather
Average highs are around 20°C, so pack for cooler days. Sunshine averages 8.1h per day, so bright days are a strong part of the month. Rainfall averages 86mm, so some wet days are possible.
May weather
Monthly averages
Temp
20°C
Rain
86mm
Sun
8.1h
Sea
10°C
Weather score
38
Poor
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Showers
Rainfall averages 86mm, so some wet days are possible.
Bright
Sunshine averages 8.1h per day, so bright days are a strong part of the month.
Cool sea
Sea temperatures average 10°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
May20°C average high
May sits in the warmer part of the year, so midday sightseeing can feel heavier than in cooler months.
Warmest monthsJune to September
This stretch sets the upper range for average daytime heat.
Rain
May86mm average rain
May sits on the drier side of Portsmouth's year, which helps with sightseeing and transfers.
Driest monthsJanuary to October
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
May8.1 hours average sun
May is brighter than Portsmouth's yearly average, though the strongest sunshine usually sits closer to the peak months.
Brightest monthsMay to August
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
May10°C average sea
May is close to Portsmouth's yearly sea-temperature average, so swimming comfort is fairly typical.
Warmest seaJuly to September
Sea temperatures are usually near 18°C in this stretch, so swimming comfort is at its strongest.
Weather score
May38 weather score
May sits close to Portsmouth's yearly weather-score average, giving a typical overall read on the month.
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