Climate Change Chart of Riyadh, Saudi Arabia

Overview of climate changes

Temperature changes

Averaged across calendar months, monthly mean temperature shows a difference of +2.58 °C in the more recent period; this is an unweighted average of monthly means, not a day-weighted annual figure or a measure of daytime maximum temperatures. The largest monthly increases were tied in August / September, each with a difference of +3.51 °C. This identifies the strongest increases among the supplied monthly comparisons, rather than implying that every month changed by the same amount.

Changes in sunshine duration

Averaged across calendar months, mean daily sunshine duration had a difference of -0.32 hours/day in the more recent period. This is an unweighted average of calendar-month means, not a day-weighted annual figure. The largest monthly decrease was in April, with a difference of -0.78 hours/day; the largest increase was in December, with a difference of +0.29 hours/day. These are the strongest changes in their respective directions among the supplied monthly comparisons, not a description of every month's sunshine.

Changes in rainfall

Averaged across calendar months, mean daily rainfall had a difference of +0.06 mm/day; this unweighted mean of monthly means is not a day-weighted annual average, and the figures describe daily amounts rather than monthly totals. The largest monthly increase occurred in November, with a difference of +0.38 mm/day, while the largest decrease was in December, with a difference of -0.34 mm/day. These contrasting monthly changes show why the small overall mean difference should not be read as a uniform shift throughout the year.