Climate Change Chart of Aarhus, Denmark

Overview of climate changes

Temperature changes

Averaged across calendar months, monthly mean temperature shows a difference of +1.51 °C compared with the earlier reference period. This is a comparison of the unweighted monthly means, not a day-weighted annual average, and it describes the overall difference rather than the change in every individual month. The largest monthly increase was in January, with a difference of +3.54 °C. This monthly mean is not a daytime maximum, and the largest increase should not be read as a description of all months.

Changes in rainfall

Averaged across calendar months, mean daily rainfall had a difference of +0.57 mm/day in the more recent period. This is an unweighted comparison of monthly means, not an annual total or a change that necessarily occurred in every month. The largest monthly increase in mean daily rainfall occurred in October, at a difference of +1.25 mm/day. These are daily mean amounts, not monthly rainfall totals, so the monthly contrast should be understood on that basis.

Changes in sunshine duration

Across calendar months, mean daily sunshine duration had a difference of -0.25 hours/day compared with the earlier reference period. This unweighted mean summarizes the monthly averages; it does not imply the same difference in each month. The largest monthly increase was in April, with a difference of +0.57 hours/day hours per day. By contrast, the largest monthly decrease was in October, at a difference of -1.03 hours/day hours per day. These monthly extremes show that the average comparison masks differing month-to-month changes; they do not establish a continuous trend.

Changes in snowfall

Averaged across calendar months, mean daily snowfall had a difference of -0.60 mm/day in the more recent period. This is an unweighted comparison of monthly means, not an annual total, and it does not describe every month's change. The largest monthly decrease was in January, with a difference of -2.72 mm/day. The measure is mean daily snowfall rather than a monthly total, and this largest decrease alone does not characterize snowfall differences in all months.