Climate Change Chart of Ayutthaya, Thailand

Overview of climate changes

Temperature changes

Averaged across calendar months, monthly mean temperature shows a difference of +0.82 °C; this is an unweighted mean of the monthly means, not a day-weighted annual average or a measure of daytime maximum temperatures. The monthly pattern was not uniform: May had the largest monthly increase, a difference of +1.55 °C, while February had the largest monthly decrease, a difference of -0.10 °C. These monthly comparisons describe averages for the respective months, rather than conditions in every individual month or a continuous change between the reference periods.

Changes in rainfall

Averaged across calendar months, mean daily rainfall had a difference of +0.34 mm/day. This is an unweighted average of monthly means for daily amounts, not a monthly rainfall total or a day-weighted annual average. The largest monthly increase was in September, with a difference of +1.84 mm/day; the largest monthly decrease was in April, with a difference of -0.62 mm/day. These contrasting monthly differences show why the across-month mean should not be read as a change that applied equally in each month.

Changes in sunshine duration

Mean daily sunshine duration, averaged across calendar months, had a difference of -0.58 hours/day. This is an unweighted average of monthly means, rather than a day-weighted annual figure. The largest monthly decrease was in August, where the difference was -1.37 hours/day. That monthly result identifies the strongest decrease in the supplied comparisons; it does not mean every month changed by the same amount.