Climate Change Chart of Breckenridge, USA

Overview of climate changes

Temperature changes

Averaged across calendar months, monthly mean temperature shows a difference of +1.38 °C compared with the earlier reference period; this is an unweighted mean of the monthly means, not a day-weighted annual average or a measure of daytime highs. The largest monthly increase was in June, at a difference of +2.37 °C. By contrast, October had the largest monthly decrease, with a difference of -0.39 °C. These monthly extremes show that the differences were not uniform across the calendar months.

Changes in snowfall

Mean daily snowfall, averaged across calendar months, had a difference of -0.28 mm/day; the figure is an unweighted mean of monthly averages, not a monthly total or day-weighted annual average. Month-to-month differences varied: February had the largest increase, at a difference of +0.64 mm/day, while the largest decrease was in December, with a difference of -2.26 mm/day. These comparisons concern average daily snowfall and do not imply that the same difference applied to every day.

Changes in rainfall

For mean daily rainfall, averaged across calendar months, the difference was +0.30 mm/day; this unweighted comparison of monthly means should not be read as a change in monthly totals or as a day-weighted annual average. The largest monthly increase occurred in October, with a difference of +1.31 mm/day, while June recorded the largest monthly decrease, a difference of -1.00 mm/day. These are changes in mean daily amounts for the named months, not evidence that every day or month followed the same pattern.

Changes in sunshine duration

Mean daily sunshine duration averaged across calendar months had a difference of -0.04 hours/day compared with the earlier period; this is an unweighted average of monthly means, not a day-weighted annual figure. The largest monthly increase was in June, with a difference of +1.21 hours/day. In July, the largest monthly decrease was a difference of -0.54 hours/day. The overall mean difference and these month-specific extremes describe separate aspects of the comparison, rather than a uniform change throughout the year.