Climate Change Chart of Naples, Italy

Overview of climate changes

Temperature changes

Monthly mean temperature was higher by a mean difference of +0.70 °C averaged across calendar months, an unweighted summary of the monthly means rather than a day-weighted annual average. This describes the overall difference between the reference periods, not a continuous change through time or a rise in every month. The largest monthly increase was in July, with a difference of +1.58 °C; this identifies the strongest increase among the reported monthly differences, not a daytime maximum.

Changes in rainfall

Mean daily rainfall had an unweighted average difference of +0.29 mm/day across calendar months, rather than a day-weighted annual average or a measure of monthly totals. The month-to-month pattern was mixed: in March, the largest monthly increase was +1.70 mm/day, while October recorded the largest monthly decrease, a difference of -1.65 mm/day. These are differences in daily means for the named months, not evidence that rainfall changed in the same direction in every month.

Changes in sunshine duration

Mean daily sunshine duration averaged across calendar months had a difference of -0.25 hours/day, indicating a lower unweighted mean in the more recent period; this is not a day-weighted annual figure or a continuous trend. Monthly differences varied: the largest decrease was in March, at -0.79 hours/day, whereas December had the largest increase, a difference of +0.20 hours/day. These monthly mean differences describe average daily sunshine for those months, not conditions on every day.

Changes in snowfall

Mean daily snowfall averaged across calendar months had a difference of -0.01 mm/day in the more recent period. Because this is a small difference between unweighted monthly means, it should be read at the displayed precision and does not establish that snowfall was absent or unchanged beyond that precision. The monthly comparisons differ in direction: January had the largest decrease, a difference of -0.20 mm/day, while the largest increase was in February, at +0.10 mm/day. These figures refer to daily means, not monthly snowfall totals.