Climate Change Chart of Mendoza, Argentina

Overview of climate changes

Temperature changes

Averaged across calendar months, monthly mean temperature shows a difference of +1.12 °C in the more recent period. This is an unweighted mean of monthly means, not a day-weighted annual average, and it describes the overall comparison rather than a change shared by every month. The largest monthly increase was in November, with a difference of +2.04 °C compared with the earlier reference period. These are monthly mean temperatures, not daytime maximum temperatures.

Changes in rainfall

Averaged across calendar months, mean daily rainfall had a difference of -0.54 mm/day in the more recent period. This unweighted comparison of monthly means is not a day-weighted annual average, and it does not imply that rainfall decreased in every month. The largest monthly decrease was in September, with a difference of -1.82 mm/day; by contrast, February had the largest monthly increase, a difference of +0.66 mm/day. These figures describe mean daily rainfall, not monthly totals, so they indicate how the monthly daily averages differed rather than the rainfall total for either month.

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 means, not a day-weighted annual average, and does not mean that daily sunshine increased in every month. The largest monthly increase occurred in September, with a difference of +1.09 hours/day. In February, the largest monthly decrease was a difference of -0.52 hours/day, showing that the monthly changes varied in direction.

Changes in snowfall

Averaged across calendar months, mean daily snowfall had a difference of -0.24 mm/day compared with the earlier reference period. This is an unweighted comparison of monthly means, not a day-weighted annual average; it summarizes the aggregate difference and does not describe every month. The largest monthly decrease was in July, with a difference of -1.70 mm/day. The largest monthly increase occurred in October, at a difference of +0.02 mm/day. These are mean daily snowfall amounts rather than monthly totals, and their contrasting directions show why the overall mean difference should not be read as a uniform monthly change.