Climate Change Chart of Espoo, Finland

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 monthly means, not a day-weighted annual average or a measure of daytime highs. The largest monthly increase was in January, with a difference of +4.10 °C. By contrast, July had the largest monthly decrease, a difference of -0.01 °C.

Changes in snowfall

Mean daily snowfall averaged across calendar months had a difference of +0.03 mm/day; this unweighted summary is not a day-weighted annual average or a monthly total. Monthly differences varied: January had the largest increase, a difference of +2.09 mm/day, whereas the largest decrease was in November, with a difference of -2.52 mm/day. The small mean difference therefore should not be read as a description of snowfall in every month.

Changes in rainfall

Averaged across calendar months, mean daily rainfall had a difference of +0.30 mm/day; this unweighted comparison describes monthly averages, not monthly rainfall totals. The largest monthly increase occurred in October, with a difference of +0.72 mm/day, while the largest decrease was in September, with a difference of -0.30 mm/day. These monthly contrasts show that the overall mean difference does not describe every month individually.

Changes in sunshine duration

Mean daily sunshine duration averaged across calendar months had a difference of -0.10 hours/day in the more recent period, an unweighted summary of monthly means rather than a day-weighted annual figure. The largest monthly increase was in June, with a difference of +0.90 hours/day; the largest monthly decrease was in October, with a difference of -0.88 hours/day. These monthly changes need not match the direction of the mean across all calendar months.