Climate Change Chart of Bergen, Norway

Overview of climate changes

Temperature changes

Monthly mean temperatures show a mean difference of +1.41 °C averaged across calendar months in the more recent period; this is an unweighted average of the monthly means, not a day-weighted annual figure or a measure of daytime maximum temperatures. The largest monthly increase was in January, with a difference of +3.76 °C compared with the earlier reference period. That identifies the strongest monthly increase, not a uniform change across every month.

Changes in rainfall

Mean daily rainfall had a mean difference of +0.60 mm/day averaged across calendar months, an unweighted summary of monthly means rather than a change in monthly rainfall totals. Monthly differences were not uniform: December had the largest increase, a difference of +2.50 mm/day, while April had the largest decrease, a difference of -2.43 mm/day. These comparisons describe average daily amounts in those months, not rainfall on every day.

Changes in sunshine duration

Mean daily sunshine duration showed a mean difference of -0.48 hours/day averaged across calendar months; this is an unweighted summary of monthly means, not a day-weighted annual average. The month-specific differences varied: the largest increase occurred in April, at +1.32 hours/day, whereas the largest decrease occurred in May, at -1.54 hours/day. These are comparisons of mean daily hours for the named months, not conditions on every day.

Changes in snowfall

Mean daily snowfall had a mean difference of -0.13 mm/day averaged across calendar months, based on an unweighted summary of monthly means rather than monthly totals. The month-to-month differences include a largest increase in February, with a difference of +2.14 mm/day, and a largest decrease in March, with a difference of -2.64 mm/day. These daily averages do not imply the same difference on each day.