Climate Change Chart of Mar del Plata, Argentina

Overview of climate changes

Temperature changes

Averaged across calendar months, the difference in monthly mean temperature was +0.17 °C compared with the earlier reference period; this is an unweighted mean of the monthly means, not a day-weighted annual figure or a measure of daytime highs. The month-to-month pattern was not uniform: the largest monthly increase was in August, at +0.82 °C, while the largest monthly decrease was in February, at -0.48 °C. These extrema describe the largest changes among the reported monthly means, rather than a change applying to every month.

Changes in rainfall

Mean daily rainfall, rather than monthly rainfall totals, had an unweighted difference across calendar-month means of +0.34 mm/day in the more recent period. This aggregate does not imply that rainfall rose in every month. The largest monthly increases were tied in March / July, with a difference of +0.84 mm/day; by contrast, June recorded the largest monthly decrease, at -0.71 mm/day. These are changes in monthly mean daily amounts and do not describe the range of rainfall on individual days.

Changes in sunshine duration

The unweighted difference in mean daily sunshine duration, averaged across calendar months, was -0.05 hours/day compared with the earlier reference period. Monthly changes varied around that overall average: June had the largest increase, at +0.61 hours/day, whereas the largest decrease occurred in January, at -0.57 hours/day. The average describes the monthly means across the calendar, not a uniform change in daily sunshine or a day-weighted annual total.

Changes in snowfall

Mean daily snowfall showed an unweighted difference across calendar-month means of -0.01 mm/day in the more recent period. At the monthly level, August had the largest decrease, at -0.07 mm/day. These figures describe differences in mean daily amounts, not monthly totals; the small calendar-month average should not be read as evidence that snowfall was absent or that every month changed by the same amount.