Climate Change Chart of Puerto Williams, Chile

Overview of climate changes

Temperature changes

Averaged across calendar months, monthly mean temperature was higher by a difference of +1.37 °C in the more recent period; this is an unweighted comparison of monthly means, not a day-weighted annual figure or a measure of daytime maximum temperatures. The largest monthly increase was in June, with a difference of +2.54 °C. This identifies the strongest increase among the reported monthly temperature differences, rather than describing every month or a continuous change between periods.

Changes in rainfall

Averaged across calendar months, mean daily rainfall was lower by a difference of -0.10 mm/day in the more recent period. This unweighted comparison of monthly means describes daily amounts, not monthly rainfall totals, and does not imply that rainfall decreased in every month. The largest monthly decrease was in December, where mean daily rainfall had a difference of -1.07 mm/day. By contrast, the largest monthly increase occurred in August, with a difference of +0.26 mm/day; these mark contrasting monthly changes rather than a uniform pattern.

Changes in snowfall

Averaged across calendar months, mean daily snowfall was lower by a difference of -0.34 mm/day in the more recent period. This unweighted comparison concerns daily amounts rather than monthly totals; it summarizes the monthly means and does not show that snowfall declined in every month. Monthly snowfall changes were mixed: the largest decrease was in May, with a difference of -3.20 mm/day, while the largest increase was in August, with a difference of +1.71 mm/day. These are differences in mean daily snowfall, not monthly totals.

Changes in sunshine duration

Averaged across calendar months, mean daily sunshine duration was lower by a difference of -0.91 hours/day in the more recent period. This is an unweighted comparison of monthly means, not a day-weighted annual average, and does not establish a decrease in every individual month. The largest monthly decrease was in February, with mean daily sunshine duration differing by -1.47 hours/day. This highlights the strongest reported monthly reduction without implying a continuous trend between the reference periods.