Climate Change Chart of Omsk, Russian Federation

Overview of climate changes

Temperature changes

Averaged across calendar months, monthly mean temperature shows a difference of +1.88 °C in the more recent period; this is an unweighted comparison of the monthly means, not a day-weighted annual average or a measure of daytime highs. The largest monthly increase was in December, with a difference of +4.93 °C. In contrast, September had the largest decrease, a difference of -0.08 °C. These month-specific differences show that the overall mean does not describe the change in every month.

Changes in snowfall

For mean daily snowfall—not monthly totals—the unweighted average across calendar-month means had a difference of +0.33 mm/day. The largest monthly increase was in December, with a difference of +2.43 mm/day, while the largest decrease occurred in April, with a difference of -2.28 mm/day. These are differences in monthly mean daily amounts; the across-month average should not be read as the change in snowfall in every month.

Changes in sunshine duration

Mean daily sunshine duration averaged across calendar months had a difference of +0.04 hours/day between the reference periods; this unweighted comparison of monthly means is not a statement about every day or month. The largest decrease was in February, with a difference of -0.72 hours/day. By comparison, the largest increases were tied across May / August, each with a difference of +0.40 hours/day. The monthly differences therefore varied in direction despite the small average increase.

Changes in rainfall

Mean daily rainfall, rather than monthly rainfall totals, had an unweighted across-month average difference of +0.02 mm/day. The largest monthly increase occurred in July, with a difference of +0.43 mm/day, while the largest decrease was in September, with a difference of -0.53 mm/day. These contrasts make clear that the small overall average difference does not apply uniformly across calendar months.