Climate Change Chart of Palermo, Italy

Overview of climate changes

Temperature changes

Averaged across calendar months, monthly mean temperature shows a difference of +0.64 °C in the more recent reference period. This is an unweighted comparison of monthly averages, not a day-weighted annual figure or a measure of daytime highs. The largest monthly increase was in December, at +2.90 °C; the largest decrease was in May, at -1.48 °C. These contrasting month-specific differences show why the overall mean should not be read as a description of every month.

Changes in rainfall

Mean daily rainfall had an unweighted difference across calendar months of +0.53 mm/day. This is a comparison of daily averages, not monthly rainfall totals, and it does not establish how often rain fell. The largest monthly increase was in November, with a difference of +1.51 mm/day, while December recorded the largest decrease, at -0.25 mm/day. The overall average and these contrasting monthly differences describe separate aspects of the comparison.

Changes in sunshine duration

Mean daily sunshine duration averaged across calendar months had a difference of -0.31 hours/day. The largest monthly decrease was in April, at -0.80 hours/day, whereas the largest increase was in December, at +0.19 hours/day. These are differences in average daily sunshine, not guarantees about the conditions on any particular day.