Climate Change Chart of Bangkok, Thailand

Overview of climate changes

Temperature changes

Averaged across calendar months, monthly mean temperature has a difference of +0.74 °C; this is an unweighted comparison of monthly means, not a day-weighted annual average or a measure of daytime maximum temperatures. The largest monthly increase was in May, with a difference of +1.40 °C. By contrast, February had the largest monthly decrease, a difference of -0.05 °C. These monthly extrema show that the overall mean difference does not describe every month’s change.

Changes in rainfall

Mean daily rainfall, rather than monthly rainfall totals, had an unweighted difference across calendar-month means of +0.26 mm/day compared with the earlier reference period. The largest monthly increase occurred in September, with a difference of +1.19 mm/day. The largest monthly decrease was in May, at a difference of -0.51 mm/day. These contrasting monthly differences qualify the average: it does not mean rainfall increased in every month.

Changes in sunshine duration

Mean daily sunshine duration had an unweighted difference across calendar-month means of -0.55 hours/day compared with the earlier reference period; this describes an aggregate, not a change that necessarily applied in every month. The largest monthly decrease was in August, with a difference of -1.46 hours/day. That monthly result identifies the strongest decrease, while the mean difference summarizes the calendar months collectively.