Climate Change Chart of Tripoli, Libya

Overview of climate changes

Temperature changes

Averaged across calendar months, monthly mean temperature shows a difference of +0.71 °C compared with the earlier reference period. This is an unweighted mean of monthly averages, not a day-weighted annual average or a measure of daytime maximum temperatures. The largest monthly increase occurred in December, with a difference of +2.82 °C. In contrast, May had the largest monthly decrease, a difference of -1.01 °C. These month-specific differences show that the overall mean does not describe the change in every month.

Changes in rainfall

Mean daily rainfall, rather than monthly rainfall totals, had an unweighted mean difference across calendar months of +0.06 mm/day. This summary describes the aggregate of monthly means; it does not imply the same change in each month's daily rainfall. The largest monthly increase was in September, with a difference of +0.21 mm/day, while November recorded the largest monthly decrease, with a difference of -0.10 mm/day. These contrasting monthly changes provide context for the modest overall mean difference without suggesting a uniform pattern through the year.

Changes in sunshine duration

Mean daily sunshine duration averaged across calendar months had a difference of -0.13 hours/day in the more recent period. This is an unweighted average of monthly means, not a day-weighted annual figure, and does not mean every month changed in the same direction. The largest monthly decrease occurred in February / April, with a difference of -0.31 hours/day. By contrast, November had the largest monthly increase, a difference of +0.15 hours/day; the monthly exceptions help show why the calendar-month mean should not be read as a uniform change.