Climate Change Chart of Madonna di Campiglio, Italy

Overview of climate changes

Temperature changes

Averaged across calendar months, monthly mean temperature shows a difference of +2.43 °C in the more recent period. This is an unweighted comparison of monthly means, not a day-weighted annual average, and it does not imply that every month warmed by the same amount. The largest monthly increase was in December, with a difference of +6.04 °C; this refers to monthly mean temperature, not daytime highs.

Changes in snowfall

Mean daily snowfall averaged across calendar months shows a difference of +2.05 mm/day between the reference periods. This unweighted average of monthly means is not a day-weighted annual average or a monthly total. The largest monthly increase was in February, with a difference of +8.05 mm/day; in October, the largest monthly decrease was -0.83 mm/day. These differences describe recorded mean daily amounts, and the overall average should not be read as a uniform change across months.

Changes in rainfall

Mean daily rainfall averaged across calendar months shows a difference of +0.35 mm/day compared with the earlier reference period. This unweighted mean describes the aggregate of monthly averages, rather than a day-weighted annual total. The largest monthly increase occurred in October, where the difference was +1.82 mm/day, while June had the largest decrease, a difference of -0.85 mm/day. These are changes in mean daily amounts for the named months, not monthly rainfall totals, and they show that the overall average does not represent every month’s comparison.

Changes in sunshine duration

Mean daily sunshine duration averaged across calendar months had a difference of -0.08 hours/day in the more recent period. This is an unweighted mean of monthly averages, not a day-weighted annual figure. Monthly differences varied in direction: June recorded the largest increase, at +0.96 hours/day, whereas November recorded the largest decrease, at -0.80 hours/day. These month-specific comparisons put the small aggregate difference in context without implying that sunshine changed uniformly throughout the year.