Climate Change Chart of Park City, USA

Overview of climate changes

Temperature changes

Across calendar months, the unweighted mean difference in monthly mean temperature was +0.94 °C. This summarizes the set of monthly means; it is not a day-weighted annual average or a measure of daytime highs. The largest monthly increase was in June, at a difference of +2.09 °C, while October had the largest decrease, a difference of -0.98 °C. These monthly extremes show that the average shift was not identical in every month.

Changes in snowfall

Mean daily snowfall, not monthly snowfall totals, had an unweighted mean difference across calendar months of +0.36 mm/day. This summarizes monthly averages and should not be read as a uniform change through the year. The largest monthly increase was in April, with a difference of +2.85 mm/day; in March, the largest decrease was a difference of -1.72 mm/day. The opposing monthly differences provide useful context for interpreting the overall mean.

Changes in rainfall

Mean daily rainfall, rather than monthly rainfall totals, had an unweighted mean difference across calendar months of +0.21 mm/day. This is an aggregate of monthly averages and does not describe the change in every month. The largest increase occurred in October, with a difference of +1.10 mm/day, whereas June recorded the largest decrease, a difference of -0.93 mm/day. Together, these contrasts indicate that the modest overall mean difference masks opposing monthly changes.

Changes in sunshine duration

Daily sunshine duration averaged across calendar months had a difference of -0.20 hours/day, an unweighted summary of the monthly means rather than a day-weighted annual figure. The monthly pattern was mixed: June had the largest increase, at a difference of +1.29 hours/day, while the largest decrease was in April, at a difference of -1.06 hours/day. Thus, the overall average does not imply that sunshine shifted in the same direction in each month.