Climate Change Chart of Stavanger, Norway

Overview of climate changes

Temperature changes

Compared with the earlier reference period, monthly mean temperature was higher by an average difference of +1.16 °C across calendar months. This is an unweighted average of monthly means, not a day-weighted annual figure, and it describes the overall difference rather than a change in every month. The largest monthly increase was in January, when the mean temperature difference was +2.90 °C; monthly means do not represent daytime maximum temperatures.

Changes in rainfall

Mean daily rainfall was higher by an average difference of +0.51 mm/day across calendar months in the more recent period. This unweighted mean of monthly differences is not a day-weighted annual average, and it does not imply that rainfall increased in every month. The largest monthly increase occurred in February, at +1.59 mm/day, while the largest decrease was in April, with a difference of -1.36 mm/day. These are changes in mean daily amounts, not monthly rainfall totals.

Changes in snowfall

Mean daily snowfall had an average difference of -0.42 mm/day across calendar months, so the unweighted average of monthly means was lower in the more recent period. That aggregate does not mean every month had less snowfall. The largest monthly decrease was in March, with a difference of -2.45 mm/day, while the largest increase occurred in December, at +1.10 mm/day. These are differences in mean daily snowfall amounts, not monthly totals.

Changes in sunshine duration

Mean daily sunshine duration showed an average difference of -0.18 hours/day across calendar months, indicating a lower unweighted average in the more recent period. This summary across monthly means is not day-weighted and does not describe the direction of every month's difference. The largest monthly increase was in April, with a difference of +1.13 hours/day; the largest decrease came in May, at -1.22 hours/day. These figures concern mean daily sunshine hours, rather than monthly totals.