Climate Change Chart of Omsk (Sibiria), Russian Federation

Overview of climate changes

Temperature changes

Averaged across calendar months, monthly mean temperature shows a difference of +1.88 °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 month-level differences were uneven: December had the largest increase, a difference of +4.93 °C, while September had the largest decrease, a difference of -0.08 °C. These extrema describe the named months rather than every month in the year.

Changes in snowfall

For mean daily snowfall—not monthly totals—the unweighted difference averaged across calendar months was +0.33 mm/day. This overall average sits alongside larger month-specific movements: December had the largest increase, a difference of +2.43 mm/day, while April had the largest decrease, a difference of -2.28 mm/day. The average summarizes the monthly means and should not be read as a description of snowfall on every day.

Changes in sunshine duration

The unweighted mean difference across calendar months in daily sunshine duration was +0.04 hours/day. Month-level changes varied around that aggregate: the largest increase was shared by May / August, with a difference of +0.40 hours/day, while February had the largest decrease, a difference of -0.72 hours/day. These figures compare mean daily hours for the months named; they do not imply the same change on each day.

Changes in rainfall

Mean daily rainfall, rather than monthly rainfall totals, had an unweighted across-month average difference of +0.02 mm/day. The small overall average does not mean the monthly differences were alike: July recorded the largest increase, a difference of +0.43 mm/day, whereas September recorded the largest decrease, a difference of -0.53 mm/day. These are comparisons of monthly daily means and do not describe every day’s rainfall.