Climate Change Chart of Copper Mountain, USA

Overview of climate changes

Temperature changes

Averaged across calendar months, monthly mean temperature shows a difference of +2.53 °C compared with the earlier reference period; this unweighted mean describes the aggregate of the monthly means, not a day-weighted annual average or daytime maximum temperatures. The largest monthly increase was in January, with a difference of +4.46 °C; that identifies the strongest increase among the supplied monthly comparisons, not a uniform change across months.

Changes in snowfall

Averaged across calendar months, mean daily snowfall had a difference of +1.56 mm/day. This is an unweighted summary of monthly means, not a day-weighted annual average or a monthly snowfall total. The largest monthly increase in mean daily snowfall was in February, with a difference of +5.29 mm/day. The largest monthly decrease was in April, with a difference of -1.27 mm/day, showing that the aggregate increase does not describe every month's comparison.

Changes in rainfall

Averaged across calendar months, mean daily rainfall shows a difference of -0.21 mm/day. This is an unweighted comparison of monthly means, rather than a day-weighted annual average, and the figures describe daily averages rather than monthly totals. The largest monthly decrease was in June, where mean daily rainfall had a difference of -0.65 mm/day. By contrast, the largest monthly increase occurred in February, with a difference of +0.01 mm/day; these extrema show that the monthly comparisons were not identical in direction or size.

Changes in sunshine duration

Mean daily sunshine duration, averaged across calendar months, had a difference of -0.41 hours/day compared with the earlier reference period. This unweighted mean summarizes monthly averages and does not imply the same difference in every month. The largest monthly decrease was in December, with a difference of -0.85 hours/day in mean daily sunshine duration; this marks the strongest monthly decrease in the supplied comparison, not a continuous change between the reference periods.