Climate Change Chart of Dammam, Saudi Arabia

Overview of climate changes

Temperature changes

Averaged across calendar months, monthly mean temperature showed a difference of +1.34 °C compared with the earlier reference period. This is an unweighted mean of monthly means, not a day-weighted annual average, and it describes the aggregate rather than the change in every month. The largest monthly increase was in September, with a difference of +1.95 °C. This refers to monthly mean temperature, not daytime maximum temperatures.

Changes in rainfall

Averaged across calendar months, mean daily rainfall had a difference of +0.10 mm/day in the more recent period. This unweighted mean of monthly means is not a day-weighted annual average, and it should not be read as the difference in every month; the figures describe daily averages, not monthly rainfall totals. The largest monthly increase in mean daily rainfall occurred in November, with a difference of +0.64 mm/day. By contrast, December had the largest monthly decrease, a difference of -0.11 mm/day. These month-specific differences show that the direction and size of change varied across the calendar months.

Changes in sunshine duration

Averaged across calendar months, mean daily sunshine duration showed a difference of -0.40 hours/day compared with the earlier reference period. This is an unweighted mean of monthly means, rather than a day-weighted annual average, and does not imply the same difference in every month. The largest monthly decrease in mean daily sunshine duration was in April, with a difference of -0.79 hours/day. This month-specific result sits alongside the broader average and indicates where the decrease was greatest.