Climate Change Chart of Baku, Azerbaijan

Overview of climate changes

Temperature changes

Averaged across calendar months, monthly mean temperature shows a difference of +1.56 °C compared with the earlier reference period; this is an unweighted mean of monthly means, not a day-weighted annual average or a measure of daytime highs. The largest monthly mean temperature increase was in June, with a difference of +3.74 °C. By contrast, November recorded the largest decrease, at -0.41 °C; these monthly differences show that the overall mean does not describe every month’s change.

Changes in sunshine duration

Mean daily sunshine duration had an unweighted average difference across calendar months of -0.39 hours/day. This summarizes monthly mean daily hours and does not imply that the difference was the same in every month. The largest monthly sunshine increase was in January, with a difference of +0.17 hours/day. In October, the largest monthly decrease was -0.81 hours/day, illustrating the contrast between the monthly extremes and the average across months.

Changes in rainfall

Mean daily rainfall, rather than monthly totals, had an average difference across calendar months of +0.17 mm/day compared with the earlier period. This is an unweighted average of monthly means, so it describes the aggregate pattern rather than rainfall on any particular day. The largest monthly increase in mean daily rainfall occurred in September, at +0.39 mm/day. The largest decrease was in April, with a difference of -0.10 mm/day; neither monthly contrast should be read as a change in monthly rainfall totals.

Changes in snowfall

Mean daily snowfall, not monthly snowfall totals, had an average difference across calendar months of -0.35 mm/day compared with the earlier reference period. This is an unweighted average of monthly means and does not indicate an equal difference in each month. The largest monthly decrease in mean daily snowfall occurred in January, at -2.17 mm/day. This identifies the monthly extreme in the supplied comparison, not a change in total snowfall for that month.