Climate Change Chart of Moroni, Comoros

Overview of climate changes

Temperature changes

Averaged across calendar months, monthly mean temperature shows a difference of +1.82 °C compared with the earlier reference period. This is an unweighted mean of the monthly means, not a day-weighted annual average, and it describes the aggregate rather than implying that every month changed by the same amount. The largest monthly increase was in April, at +2.09 °C; that identifies the strongest increase among the reported months, not a daytime maximum or a uniform change throughout the year.

Changes in rainfall

Mean daily rainfall, rather than monthly totals, was higher on average across calendar months, with a difference of +0.94 mm/day. This unweighted average of monthly means summarizes the overall comparison but does not mean that rainfall increased in every month. The largest monthly increase occurred in February, with a difference of +3.70 mm/day, while April had the largest monthly decrease, a difference of -0.81 mm/day. These contrasting monthly changes show why the aggregate mean should not be read as a description of each month's daily rainfall.

Changes in sunshine duration

Mean daily sunshine duration had an average difference of -0.22 hours/day across calendar months, indicating a lower mean in the more recent period. This is an unweighted comparison of monthly means, not a day-weighted annual total, and it does not establish that sunshine declined in every month. The largest monthly decrease was in February, at -0.90 hours/day; this marks the most pronounced reported monthly decrease rather than a uniform change across the calendar.