Climate Change Chart of Venice, Italy

Overview of climate changes

Temperature changes

Across calendar months, the unweighted mean difference in monthly mean temperature was an increase of +1.54 °C. This summarizes the monthly means rather than a day-weighted annual average, and it does not imply the same change in every month or describe daytime maximum temperatures. The largest monthly increase was in January, with a difference of +3.11 °C compared with the earlier reference period. This identifies the strongest increase among the supplied monthly temperature differences, not a continuous change between the reference periods.

Changes in sunshine duration

Across calendar months, the unweighted mean difference in daily sunshine duration was a decrease of -0.38 hours/day. This aggregate of monthly means does not mean sunshine duration decreased in every month. The largest monthly decrease was in May, with a difference of -1.15 hours/day compared with the earlier reference period. In June, the largest monthly increase was a difference of +0.19 hours/day, showing that the monthly differences were not all in the same direction.

Changes in rainfall

Averaged across calendar months, mean daily rainfall had an increase of +0.62 mm/day in the more recent period. This is an unweighted average of monthly means, not a day-weighted annual figure or a monthly rainfall total, and it does not describe every month's change. The largest monthly increase in mean daily rainfall occurred in May, with a difference of +1.33 mm/day. By contrast, the largest monthly decrease was in October, at a difference of -0.30 mm/day; both values describe daily means rather than monthly totals.

Changes in snowfall

Averaged across calendar months, mean daily snowfall had a decrease of -0.30 mm/day in the more recent period. This is an unweighted average of monthly means, not a day-weighted annual average or a monthly total. The largest monthly decrease in mean daily snowfall was in January, with a difference of -2.16 mm/day. The largest monthly increase was in March, at a difference of +0.20 mm/day; these daily-mean differences describe particular months and do not establish that snowfall was absent in either period.