Climate Change Chart of Zagreb, Croatia

Overview of climate changes

Temperature changes

Averaged across calendar months, the difference in monthly mean temperature was +1.77 °C. This unweighted comparison describes the average of the month-by-month means, not a day-weighted annual average or daytime highs. The largest monthly increase was in January, at a difference of +4.87 °C; by contrast, September had the largest monthly decrease, a difference of -0.59 °C. These extrema show that changes in monthly means were not uniform across the calendar.

Changes in rainfall

Mean daily rainfall, rather than monthly rainfall totals, was higher on average across calendar months, with a difference of +0.76 mm/day. This is an unweighted mean of monthly averages and does not imply that rainfall increased in every month. The largest monthly increase occurred in September, with a difference of +2.08 mm/day, while June recorded the largest decrease, a difference of -0.23 mm/day. These month-specific contrasts provide context for the overall mean without describing daily variability or totals.

Changes in snowfall

Mean daily snowfall averaged across calendar months had a difference of -0.64 mm/day. This unweighted mean summarizes the month-by-month daily averages; it is not a monthly total and does not mean snowfall decreased in every month. The largest monthly decrease was in December, with a difference of -2.39 mm/day, while April had the largest increase, at +0.32 mm/day. The opposing monthly differences show why the overall mean should be read as an aggregate rather than a description of each month.

Changes in sunshine duration

Mean daily sunshine duration averaged across calendar months had a difference of -0.13 hours/day, a modest decrease in the more recent period. The monthly differences varied around that mean: May had the largest decrease, at -0.95 hours/day, whereas June saw the largest increase, at +0.41 hours/day. These are comparisons of monthly mean daily hours, not a measure of sunshine on every individual day.