Climate Change Chart of Heraklion, Greece

Overview of climate changes

Temperature changes

Averaged across calendar months, monthly mean temperature shows a difference of +0.26 °C in the more recent period; this is an unweighted comparison of monthly means, not a day-weighted annual average or a measure of daytime maximum temperatures. The largest monthly increase was in January, with a difference of +0.93 °C, while the largest monthly decrease was in June, with a difference of -1.01 °C. These month-specific contrasts show that the overall mean difference does not describe the change in every month.

Changes in rainfall

Mean daily rainfall, averaged across calendar months, had a difference of +0.37 mm/day in the more recent period. This is an unweighted comparison of monthly means, not a day-weighted annual average, and the measure describes daily amounts rather than monthly rainfall totals. The largest monthly increase in mean daily rainfall occurred in February, with a difference of +1.13 mm/day. This is a comparison for that month and does not imply that rainfall increased in every month.

Changes in sunshine duration

Averaged across calendar months, mean daily sunshine duration had a difference of -0.23 hours/day compared with the earlier reference period. This is an unweighted mean of the monthly figures, rather than a day-weighted annual average. The largest monthly decrease was in February, with a difference of -0.64 hours/day. In contrast, the largest monthly increase was in November, with a difference of +0.02 hours/day; these month-specific differences qualify the overall average rather than describing every month.

Changes in snowfall

Mean daily snowfall, averaged across calendar months, had a difference of +0.06 mm/day in the more recent period. This is an unweighted comparison of monthly means, not a day-weighted annual average; the small mean difference should be understood at the precision shown. The largest monthly increase in mean daily snowfall occurred in February, with a difference of +0.49 mm/day. This refers to the daily mean for that month, not a monthly snowfall total, and does not establish increases across all months.