Climate Change Chart of Faro, Portugal

Overview of climate changes

Temperature changes

Averaged across calendar months, monthly mean temperature shows a difference of +0.68 °C compared with the earlier reference period; this is an unweighted comparison of monthly means, not a day-weighted annual average or a measure of daytime highs. The monthly shifts were not uniform: December had the largest increase, a difference of +1.80 °C, while June had the largest decrease, a difference of -0.37 °C. These extrema describe the changes in those months, not every month or a continuous trend.

Changes in rainfall

The unweighted mean across calendar-month mean daily rainfall amounts had a difference of -0.03 mm/day compared with the earlier period; this is not a day-weighted annual average or a monthly rainfall total. Month-to-month changes varied: in October, the largest increase was a difference of +0.76 mm/day, whereas January recorded the largest decrease, a difference of -1.03 mm/day. These daily-mean comparisons describe the specified months and do not imply that every month changed in the same direction.

Changes in sunshine duration

Mean daily sunshine duration, averaged across calendar months, had a difference of -0.23 hours/day; the aggregate is an unweighted mean of monthly values, not a day-weighted annual average. The individual monthly changes were uneven: January showed the largest increase, a difference of +0.09 hours/day, while the largest decrease occurred in April, at a difference of -0.60 hours/day. These monthly comparisons do not establish a continuous trend or describe every day within either reference period.