Climate Change Chart of Harare, Zimbabwe

Overview of climate changes

Temperature changes

Averaged across calendar months, monthly mean temperature shows a difference of +1.06 °C. This is an unweighted mean of the monthly means, not a day-weighted annual average, and it describes the overall comparison rather than a continuous trend or every individual month. The largest monthly increase was in August, with a difference of +1.57 °C. By contrast, October had the largest monthly decrease, a difference of -0.11 °C. These monthly means are not daytime maximum temperatures.

Changes in rainfall

Averaged across calendar months, mean daily rainfall had a difference of -0.45 mm/day. This unweighted mean of monthly means is not a day-weighted annual average, and the daily amounts should not be read as monthly totals. The clearest month-specific contrast was February, where mean daily rainfall had a difference of -2.85 mm/day; this was the largest monthly decrease. In January, the largest monthly increase was a difference of +0.67 mm/day. These comparisons describe differences between reference-period averages, not changes in every day or a continuous trend.

Changes in sunshine duration

Across calendar months, mean daily sunshine duration had an unweighted average difference of +0.11 hours/day. This summarizes the monthly means rather than a day-weighted annual average, so it does not imply that sunshine duration changed by the same amount in each month. The largest monthly increase occurred in March, with a difference of +0.78 hours/day. In April, sunshine duration instead had its largest monthly decrease, a difference of -0.58 hours/day. These are differences in mean daily hours between reference periods, not a continuous trend.