Climate Change Chart of Thimphu, Bhutan

Overview of climate changes

Temperature changes

Averaged across calendar months, monthly mean temperature shows a difference of +1.92 °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 August, with a difference of +2.64 °C. This identifies the strongest increase among the supplied monthly temperature differences, rather than describing every month.

Changes in rainfall

Averaged across calendar months, mean daily rainfall had a difference of -4.34 mm/day compared with the earlier reference period. This unweighted mean of monthly means describes an overall change in daily rainfall levels, not monthly rainfall totals or a day-weighted annual average. The largest monthly decrease occurred in August, with a difference of -8.30 mm/day. That marks the strongest decrease in the supplied monthly comparisons; it does not mean rainfall decreased by the same amount in every month.

Changes in sunshine duration

Mean daily sunshine duration, averaged across calendar months, shows a difference of +0.55 hours/day compared with the earlier reference period. The figure summarizes monthly mean daily hours through an unweighted mean, rather than a day-weighted annual measure. The largest monthly increase was in August, where the difference was +1.61 hours/day. By contrast, December had the largest monthly decrease, with a difference of -0.11 hours/day; these extrema describe particular months, not a uniform change throughout the year.

Changes in snowfall

Averaged across calendar months, mean daily snowfall had a difference of -0.31 mm/day compared with the earlier reference period. This is an unweighted average of monthly mean daily amounts, not a monthly total or a day-weighted annual average. Monthly snowfall differences were mixed: January recorded the largest decrease, a difference of -3.96 mm/day, while March recorded the largest increase, a difference of +0.78 mm/day. These monthly contrasts do not imply the same direction of change in every month.