Climate Change Chart of Bandar Seri Begawan, Brunei Darussalam

Overview of climate changes

Temperature changes

Averaged across calendar months, monthly mean temperature shows a difference of +1.36 °C compared with the earlier reference period; this is an unweighted mean of monthly means, not a day-weighted annual average or a measure of daytime maximum temperatures. The largest monthly increase was in November, with a difference of +1.57 °C. This identifies the strongest monthly increase among the supplied temperature differences, rather than implying the same change in every month.

Changes in rainfall

Averaged across calendar months, mean daily rainfall has a difference of +2.03 mm/day compared with the earlier reference period. This unweighted average of monthly means describes daily amounts, not monthly rainfall totals, and does not mean that rainfall increased in every month. The largest monthly increase was in December, where mean daily rainfall had a difference of +4.57 mm/day. In contrast, September had the largest monthly decrease, with a difference of -0.49 mm/day; these contrasting monthly differences show why the overall mean should not be read as a uniform change throughout the year.

Changes in sunshine duration

Averaged across calendar months, mean daily sunshine duration had a difference of -0.65 hours/day compared with the earlier reference period. This is an unweighted average of monthly means, rather than a day-weighted annual measure, and does not describe the change in every individual month. The largest monthly decrease was in January, with a difference of -1.19 hours/day in mean daily sunshine duration. It marks the strongest decrease among the supplied monthly differences, not a uniform shift across the calendar.