Climate Change Chart of Maui (Hawaii), USA

Overview of climate changes

Temperature changes

The mean difference in monthly mean temperature, averaged across calendar months, was a change of +1.26 °C. This is an unweighted average of the monthly means, not a day-weighted annual average, and it describes the overall difference between the reference periods rather than a continuous trend or the change in every month. The largest monthly increase was in July, at +1.55 °C; these are monthly mean temperatures, not daytime highs.

Changes in rainfall

For mean daily rainfall, the difference averaged across calendar months was +0.03 mm/day. This unweighted summary of monthly means is not a day-weighted annual average or a monthly rainfall total, and it does not imply the same difference in every month. The month with the largest increase was February, with a change of +1.04 mm/day, while the largest decrease was in January, at -0.88 mm/day. These monthly contrasts show that the overall mean difference sits alongside changes in opposite directions in particular months; daily amounts are being compared, not accumulated monthly totals.

Changes in sunshine duration

Mean daily sunshine duration averaged across calendar months had a difference of -0.24 hours/day. This is an unweighted summary of monthly means, not a day-weighted annual measure, and it should not be read as a uniform change across the year. The largest monthly decrease occurred in April, with a change of -0.62 hours/day; by contrast, the largest increase was in January, at +0.05 hours/day. These figures describe differences in mean daily hours for the indicated months, rather than total sunshine accumulated over a month.