Climate Change Chart of Frankfurt am Main, Germany

Overview of climate changes

Temperature changes

Averaged across calendar months, monthly mean temperature shows a difference of +1.60 °C compared with the earlier reference period. This is an unweighted comparison of monthly means, not a day-weighted annual average or a measure of daytime maximum temperatures. The largest monthly increase was in January, with a difference of +4.40 °C. That identifies the strongest increase among the supplied monthly temperature differences, rather than describing every month or a continuous trend.

Changes in rainfall

Averaged across calendar months, mean daily rainfall increased by +0.42 mm/day compared with the earlier reference period. This unweighted mean of monthly differences describes an aggregate, not the change in every month; the figures are daily means rather than monthly rainfall totals. The largest monthly increase was in October, where mean daily rainfall had a difference of +0.78 mm/day. By contrast, the largest monthly decrease was in November, with a difference of -0.12 mm/day; these extremes show that monthly changes did not all move in the same direction.

Changes in sunshine duration

Mean daily sunshine duration, averaged across calendar months, had a difference of -0.19 hours/day. This is an unweighted comparison of monthly means, not a day-weighted annual figure or a description of every month. The monthly contrasts include an increase of +0.72 hours/day in April and a decrease of -1.02 hours/day in January. These mark the largest monthly increase and decrease respectively, while the metric represents mean daily sunshine hours.

Changes in snowfall

Averaged across calendar months, mean daily snowfall decreased by -0.30 mm/day compared with the earlier reference period. This unweighted monthly-mean comparison describes an overall difference, not a decrease in every month; the measurements are daily amounts rather than monthly totals. The largest monthly decrease was in February, with a difference of -1.42 mm/day, while the largest monthly increase was in April, with a difference of +0.27 mm/day. The opposing monthly changes underline why the mean difference should not be read as a uniform change throughout the year.