Climate Change Chart of Maui, USA

Overview of climate changes

Changes in sunshine duration

Mean daily sunshine duration was lower on average across calendar months, with a difference of -0.24 hours/day compared with the earlier reference period. This is an unweighted summary of monthly means, not a day-weighted annual average, and it does not imply the same change in every month. The largest monthly decrease occurred in April, with a difference of -0.62 hours/day; by contrast, January recorded the largest increase, a difference of +0.05 hours/day. These comparisons concern mean daily hours of sunshine.

Changes in rainfall

Mean daily rainfall had a difference of +0.03 mm/day when averaged across calendar months, a small aggregate increase that does not describe every month. This is an unweighted mean of monthly averages, rather than a day-weighted annual average or a monthly rainfall total. Month-to-month differences went in both directions: February had the largest increase, a difference of +1.04 mm/day, while January had the largest decrease, a difference of -0.88 mm/day. These figures describe mean daily amounts in the respective months, not accumulated rainfall.

Temperature changes

Averaged across calendar months, monthly mean temperature shows a difference of +1.26 °C compared with the earlier reference period. This unweighted mean summarizes the month-by-month averages; it is not a day-weighted annual average and does not mean that every month changed by the same amount. The largest monthly increase was in July, with a difference of +1.55 °C. These are changes in monthly mean temperature, not daytime maximum temperatures.