Climate Change Chart of Alexandria, Egypt

Overview of climate changes

Temperature changes

Averaged across calendar months, monthly mean temperature shows a difference of +0.76 °C compared with the earlier reference period. This is an unweighted average of monthly means, not a day-weighted annual average, and it describes the overall monthly pattern rather than a change in every month. The largest monthly increase was in December, with a difference of +1.49 °C. These figures describe monthly mean temperatures, not daytime maximum temperatures.

Changes in rainfall

Averaged across calendar months, mean daily rainfall had a difference of +0.13 mm/day in the more recent period. This unweighted average of monthly means is not a day-weighted annual average, and it does not imply that rainfall increased in every month. The largest monthly increase was in January, where mean daily rainfall had a difference of +0.56 mm/day. This is a daily mean, not a monthly rainfall total. By contrast, September had the largest monthly decrease, with a difference of -0.02 mm/day in mean daily rainfall. The monthly contrasts show that the overall mean difference does not describe every month's direction.

Changes in sunshine duration

Averaged across calendar months, mean daily sunshine duration had a difference of -0.22 hours/day compared with the earlier reference period. This is an unweighted average of monthly means, not a day-weighted annual average, and does not mean that every month had less sunshine. The largest monthly decrease was in February, with a difference of -0.57 hours/day in mean daily sunshine duration. This monthly result is distinct from the average difference across calendar months.