Climate Change Chart of Las Vegas, USA

Overview of climate changes

Temperature changes

Monthly mean temperature was higher by an unweighted mean difference of +2.07 °C across calendar months in the more recent period; this describes the average difference between monthly means, not daytime maximum temperatures or the change in every month. The largest monthly increase was in March, with a difference of +3.46 °C.

Changes in rainfall

Averaged across calendar months, mean daily rainfall had an unchanged difference of 0.00 mm/day between the periods; this is an unweighted mean of monthly means, not a day-weighted annual average or a monthly rainfall total. Monthly differences nevertheless varied in direction: the largest increase in mean daily rainfall was in January, at +0.34 mm/day, while the largest decrease was in February, at -0.32 mm/day.

Changes in sunshine duration

Mean daily sunshine duration averaged across calendar months had a difference of -0.14 hours/day in the more recent period, an unweighted mean of monthly averages rather than a day-weighted annual measure. The largest monthly increase was in February, with a difference of +0.25 hours/day; the largest decrease was in July, with a difference of -0.50 hours/day. These extremes show that the overall mean does not describe the change in every month.

Changes in snowfall

Mean daily snowfall, averaged across calendar months, had a difference of -0.11 mm/day between the reference periods; this unweighted mean of monthly averages is not a monthly total. The largest monthly decrease was in January, with a difference of -0.94 mm/day, while the largest increase was in February, with a difference of +0.13 mm/day. These month-specific differences need not match the average across all calendar months.