Climate Change Chart of Johor Bahru, Malaysia

Overview of climate changes

Temperature changes

Averaged across calendar months, monthly mean temperature shows a difference of +0.77 °C in the more recent period 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 increases were tied across March / September / December, each with a difference of +0.87 °C. These monthly mean comparisons identify the strongest reported increases, rather than describing every month.

Changes in rainfall

Mean daily rainfall, rather than monthly totals, averaged across calendar months shows a difference of +2.34 mm/day in the more recent period. This is an unweighted average of the calendar-month means, so it does not imply that daily rainfall increased by the same amount in every month. The largest monthly increase was in June, with a difference of +4.25 mm/day in mean daily rainfall. By contrast, February had the largest monthly decrease, a difference of -0.61 mm/day; these are monthly comparisons, not changes in monthly rainfall totals.

Changes in sunshine duration

Averaged across calendar months, mean daily sunshine duration had a difference of -1.40 hours/day compared with the earlier reference period. This unweighted mean describes the aggregate of monthly means, not a uniform change in sunshine hours across all months. The largest monthly decrease in mean daily sunshine duration occurred in November, with a difference of -2.53 hours/day. It marks the strongest reported monthly decrease, rather than indicating the same change in other months.