Climate Change Chart of Powder Mountain, USA

Overview of climate changes

Temperature changes

Averaged across calendar months, monthly mean temperature shows a difference of +1.35 °C compared with the earlier reference period; this is an unweighted comparison of monthly means, not a day-weighted annual average or a measure of daytime highs. The largest monthly increase was in January, at +4.07 °C, while October had the largest decrease, a difference of -0.94 °C.

Changes in rainfall

For mean daily rainfall, the difference averaged across calendar months was -0.18 mm/day. The largest decrease occurred in June, with a difference of -1.68 mm/day, while September recorded the largest increase, a difference of +0.22 mm/day. These are daily means, not monthly totals, and the overall mean does not imply the same change in every month.

Changes in snowfall

Mean daily snowfall averaged across calendar months had a difference of +0.46 mm/day. The largest increase was in April, at +3.20 mm/day, while the largest decrease was in May, at -0.96 mm/day; these daily averages do not describe accumulated seasonal snowfall.

Changes in sunshine duration

Mean daily sunshine duration averaged across calendar months showed a difference of -0.26 hours/day. The largest increase was in June, at +1.38 hours/day, while May had the largest decrease, at -0.89 hours/day. Monthly averages summarize typical conditions across each calendar month and do not establish what any particular day will be like.