Climate Change Chart of Tbilisi, Georgia

Overview of climate changes

Temperature changes

Averaged across calendar months, monthly mean temperatures show a difference of +1.63 °C compared with the earlier reference period; this is an unweighted comparison of month means, not a day-weighted annual average or a measure of daytime maximum temperatures. The most pronounced monthly increase was in January, with a difference of +4.35 °C. By contrast, July had the largest monthly decrease, a difference of -0.05 °C. These monthly extremes show that the overall mean difference does not describe every month equally.

Changes in sunshine duration

Mean daily sunshine duration averaged across calendar months had a difference of +0.09 hours/day compared with the earlier reference period. This is an unweighted comparison of monthly means, not a day-weighted annual figure. The largest monthly increase was in May, with a difference of +0.87 hours/day, while February recorded the largest decrease, a difference of -0.48 hours/day. The opposing monthly differences indicate why the small overall mean difference should not be taken to describe each month individually.

Changes in rainfall

Mean daily rainfall averaged across calendar months had a difference of +0.37 mm/day in the more recent period. This is an unweighted comparison of monthly means, rather than a day-weighted annual average, and it describes daily amounts rather than monthly rainfall totals. The largest monthly increase occurred in April, where the difference was +0.85 mm/day. That monthly contrast is more pronounced than the across-month mean suggests, so the mean should not be read as a uniform change in daily rainfall in every month.

Changes in snowfall

Mean daily snowfall averaged across calendar months had a difference of -0.40 mm/day in the more recent period. This is an unweighted comparison of monthly means and concerns daily amounts, not monthly totals. The largest monthly decrease was in January, with a difference of -2.23 mm/day. These figures describe the comparison between reference periods; the across-month mean does not imply the same decrease in every month.