Climate Change Chart of Revelstoke, Canada

Overview of climate changes

Temperature changes

Averaged across calendar months, monthly mean temperature shows a difference of +1.70 °C compared with the earlier reference period; this is an unweighted average of monthly means, not a day-weighted annual average or a measure of daytime maximum temperatures. The largest monthly increase was in January, with a difference of +4.51 °C. This identifies the strongest month-specific increase in the supplied temperature differences, rather than implying that every month warmed by the same amount.

Changes in sunshine duration

Mean daily sunshine duration averaged across calendar months shows a difference of -0.40 hours/day compared with the earlier period. This is an unweighted mean of monthly means, not a day-weighted annual figure, and describes the aggregate rather than the change in every individual month. The largest monthly decrease was in April, with a difference of -0.93 hours/day hours per day. The largest monthly increase, in December, was a difference of +0.02 hours/day; the extremes provide a more specific view of how monthly sunshine differences varied around the overall mean.

Changes in snowfall

Mean daily snowfall, averaged across calendar months, has a difference of +0.18 mm/day. This is an unweighted comparison of monthly means, not a day-weighted annual average, and the small aggregate difference does not mean snowfall was absent in either period. The largest monthly increase occurred in February, with a difference of +3.66 mm/day in mean daily snowfall. In October, the largest monthly decrease was a difference of -3.32 mm/day. These month-specific differences point in opposite directions, so the modest mean difference should not be read as describing each month's snowfall change.

Changes in rainfall

Mean daily rainfall, averaged across calendar months, has a difference of +0.34 mm/day. This unweighted comparison of monthly means is not a day-weighted annual average, and the values describe daily amounts rather than monthly totals. The largest monthly increase occurred in September, with a difference of +1.17 mm/day in mean daily rainfall. By contrast, July had the largest monthly decrease, a difference of -0.47 mm/day; these extrema show that the month-specific differences did not all move in the same direction.