Climate Change Chart of Navarino Island, Chile

Overview of climate changes

Changes in snowfall

Across calendar months, the unweighted mean difference in mean daily snowfall was an increase of +1.66 mm/day. This summarizes monthly mean daily amounts, not snowfall totals for whole months. The largest monthly increase in mean daily snowfall occurred in September, with a difference of +4.77 mm/day; the largest monthly decrease was in May, at a difference of -1.99 mm/day. The opposing monthly differences show why the overall mean should not be taken to describe each month individually.

Changes in sunshine duration

Mean daily sunshine duration averaged across calendar months showed a decrease of -0.84 hours/day in the more recent period. This is an unweighted mean of monthly differences, not a day-weighted annual figure. The largest monthly decrease was in February, with a difference of -1.49 hours/day in mean daily sunshine duration; the strongest increase was in June, at a difference of +0.07 hours/day. These contrasting month-specific changes put the overall decrease in context without implying the same pattern in every month.

Temperature changes

Across calendar months, the unweighted mean difference in monthly mean temperature was an increase of +2.04 °C compared with the earlier reference period; this summarizes monthly averages rather than daytime maximum temperatures or conditions in every month. The largest monthly increase was in June, with a difference of +3.77 °C in monthly mean temperature, marking a particularly clear month-specific contrast rather than a uniform shift across the year.

Changes in rainfall

Averaged across calendar months, mean daily rainfall had an increase of +0.06 mm/day in the more recent period; this unweighted comparison of monthly means is not a day-weighted annual average or a measure of monthly totals. The largest monthly increase in mean daily rainfall occurred in March, at a difference of +0.54 mm/day. In contrast, December had the largest monthly decrease, a difference of -0.60 mm/day, showing that the average change does not describe every month.