Climate Chart of Longyearbyen, Norway

Climate overview

Temperature

The monthly mean temperature is lowest in March, at -13.4 °C, and highest in July, at 7.7 °C. These are monthly averages, not daytime highs or lows, so they do not show the range visitors may encounter within a day. Across the calendar months, the unweighted mean of the monthly means is -4.2 °C. It provides a broad annual reference, but is not a day-weighted average and cannot describe conditions on specific travel dates.

Sunshine

Mean daily sunshine duration peaks in May, at 13.72 hours/day. For outdoor plans that prioritise average sunshine, this marks the strongest monthly mean in the supplied record, though it does not predict the sunshine on an individual day. The lowest mean daily sunshine duration is 0.00 hours/day in January / November / December. The unweighted mean of the monthly sunshine figures is 5.31 hours/day; sunshine duration is not the same as day length.

Rain

Mean daily rainfall is lowest in March, at 0.01 mm/day, and reaches its highest monthly mean in August, at 1.62 mm/day. These are daily averages, not monthly totals; the lower average does not guarantee dry days or indicate how frequently rain occurs. The unweighted mean across the monthly daily-rainfall means is 0.50 mm/day. It is useful as a broad reference, but does not tell visitors how rainfall is distributed from day to day.

Snow

Mean daily snowfall is highest in February, at 11.30 mm/day, and lowest in July, at 0.45 mm/day. These averages indicate snowfall amounts, not the number of snowy days, snow depth, or whether snow cover or skiing conditions will be present. The unweighted mean across the monthly daily-snowfall means is 6.91 mm/day. As with the monthly figures, it is not a measure of snowfall on a particular date.