Climate Change Chart of Buenos Aires, Argentina

Overview of climate changes

Temperature changes

Averaged across calendar months, monthly mean temperature shows a difference of +0.27 °C. This is an unweighted comparison of monthly means, not a day-weighted annual average, and it does not imply that every month became warmer. The largest monthly increase was in August, with a difference of +0.96 °C. By contrast, February had the largest monthly decrease, a difference of -0.54 °C. These are changes in monthly mean temperature, not daytime maximum temperatures.

Changes in rainfall

Mean daily rainfall averaged across calendar months had a difference of +0.29 mm/day. This unweighted mean of monthly values describes an overall comparison, not a change shared by every month; the figures are daily means rather than monthly rainfall totals. The largest monthly increase occurred in February, with a difference of +1.49 mm/day, while June recorded the largest decrease, a difference of -1.12 mm/day. These contrasting monthly differences show why the overall mean should not be read as a uniform shift through the calendar.

Changes in sunshine duration

Mean daily sunshine duration averaged across calendar months had a difference of +0.05 hours/day. This is an unweighted comparison of monthly means, rather than a day-weighted annual average, and does not mean sunshine duration increased in every month. The largest monthly increase was in June, with a difference of +0.70 hours/day. In January, sunshine duration instead had the largest monthly decrease, a difference of -0.69 hours/day; these are changes in mean daily hours, not totals for the month.

Changes in snowfall

For mean daily snowfall, the unweighted average across calendar-month means was unchanged at the displayed precision, with a difference of 0.00 mm/day. This rounded result does not establish that snowfall was absent or that every monthly value was identical between the reference periods.