Climate Change Chart of Dusseldorf, Germany

Overview of climate changes

Temperature changes

Averaged across calendar months, the difference in monthly mean temperature was +1.56 °C compared with the earlier reference period; this unweighted comparison describes monthly means, not daytime highs or a change in every month. The largest monthly increase was in January, with a difference of +3.63 °C. By contrast, April had the largest decrease, a difference of -0.04 °C, so the overall mean masks contrasting month-specific changes.

Changes in rainfall

Averaged across calendar months, mean daily rainfall showed a difference of +0.41 mm/day in the more recent period. This is an unweighted average of monthly mean daily amounts, not an annual rainfall total or a day-weighted average. The largest monthly increase occurred in January, at a difference of +1.19 mm/day, while April recorded the largest decrease, a difference of -0.39 mm/day. These contrasts describe the monthly means and do not imply that every day in either month followed the same pattern.

Changes in snowfall

Averaged across calendar months, the difference in mean daily snowfall was -0.28 mm/day. This unweighted summary compares monthly mean daily amounts, not monthly snowfall totals; it does not mean snowfall was absent in either period. The largest decrease in mean daily snowfall was in January, with a difference of -1.80 mm/day. In April, the largest increase was a difference of +0.29 mm/day, illustrating how month-specific changes can differ from the overall mean.

Changes in sunshine duration

Across calendar months, the unweighted mean difference in daily sunshine duration was -0.14 hours/day; this summarizes monthly averages rather than a day-weighted annual figure. The largest increase in mean daily sunshine was in February, with a difference of +0.47 hours/day. The largest decrease was in January, at a difference of -0.90 hours/day, showing that the average shift was not uniform across months.