Cool
Average highs are around 1°C, so pack for cooler days.
September verdict
Longyearbyen, Norway in September
Weather score23Poor
Poor for holiday weather
Average highs are around 1°C, so pack for cooler days. Sunshine averages 2.6h per day, so this is not one of the brighter months. Rainfall averages 25mm, which is relatively low for holiday planning.
September weather
Monthly averages
Temp
1°C
Rain
25mm
Sun
2.6h
Sea
4°C
Weather score
23
Poor
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Drier
Rainfall averages 25mm, which is relatively low for holiday planning.
Limited sun
Sunshine averages 2.6h per day, so this is not one of the brighter months.
Cool sea
Sea temperatures average 4°C, so the water can feel cool.
Map
Weather map
Compare Longyearbyen, Norway with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
September1°C average high
September sits in the warmer part of the year, so midday sightseeing can feel heavier than in cooler months.
Warmest monthsJune to August
This stretch sets the upper range for average daytime heat.
Rain
September25mm average rain
September is close to Longyearbyen's usual rainfall pattern, with little seasonal change across the year.
Driest monthsAll year
Rainfall stays comparatively low through the year.
Sun
September2.6 hours average sun
September is below Longyearbyen's yearly sunshine average, so bright-day planning is less reliable than in peak months.
Brightest monthsApril to July
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
September4°C average sea
September sits in the warmer sea-temperature season, usually making swimming easier to enjoy.
Warmest seaJuly to August
Sea temperatures are usually near 4°C in this stretch, so swimming comfort is at its strongest.
Weather score
September23 weather score
September is one of the weakest weather-score months, when the overall mix is less favourable than the rest of the year.
Best weather monthsApril to July
These months have the strongest weather score in the monthly averages.