Climate Change Chart of Genoa, Italy

Overview of climate changes

Temperature changes

Averaged across calendar months, monthly mean temperature shows a difference of +3.00 °C compared with the earlier reference period. This is an unweighted average of monthly means, not a day-weighted annual figure, and it describes mean temperatures rather than daytime maxima. The largest monthly increase was in January, with a difference of +7.76 °C; that identifies the strongest reported monthly increase, not a uniform change across all months.

Changes in rainfall

Mean daily rainfall averaged across calendar months shows a difference of +1.93 mm/day in the more recent period. This is an unweighted average of calendar-month means, not a day-weighted annual average or a monthly rainfall total. The largest monthly increase occurred in November, with a difference of +4.33 mm/day. This points to a particularly strong change in that month's daily mean; it does not imply that rainfall increased by the same amount in every month.

Changes in snowfall

Mean daily snowfall averaged across calendar months shows a difference of -1.21 mm/day in the more recent period. This unweighted mean of monthly daily averages is not a monthly total, and the difference does not mean snowfall declined in every month. The largest monthly decrease was in January, with a difference of -5.58 mm/day; by contrast, the largest monthly increase was in March, with a difference of +0.53 mm/day. These figures describe changes in the recorded monthly means, not snowfall on any particular day.

Changes in sunshine duration

Mean daily sunshine duration averaged across calendar months had a difference of -0.16 hours/day compared with the earlier reference period. This unweighted average of monthly means summarizes the calendar months rather than representing a day-weighted annual figure. The largest monthly decrease was in February, with a difference of -1.00 hours/day, while the largest increase was in March, with a difference of +0.31 hours/day. These month-specific contrasts show that the overall mean difference does not describe every month's change.