Climate Change Chart of Braga, Portugal

Overview of climate changes

Temperature changes

Averaged across calendar months, monthly mean temperature shows a difference of +0.57 °C compared with the earlier reference period; this is an unweighted mean of monthly means, not a day-weighted annual average or a measure of daytime highs. The monthly pattern was not uniform: December had the largest monthly increase, a difference of +1.89 °C, while June had the largest monthly decrease, a difference of -0.75 °C. These extrema describe the largest month-specific changes, rather than implying that every month followed the same direction.

Changes in rainfall

Mean daily rainfall, rather than monthly rainfall totals, averaged across calendar months shows a difference of +0.65 mm/day in the more recent period; this is an unweighted comparison of monthly means, not a day-weighted annual average. The month-to-month changes varied: October recorded the largest increase, a difference of +3.69 mm/day, whereas May recorded the largest decrease, a difference of -1.16 mm/day. Those daily-mean differences should not be read as changes to whole-month totals or as a uniform shift across all months.

Changes in sunshine duration

Mean daily sunshine duration averaged across calendar months was lower in the more recent period, with a difference of -0.56 hours/day. This is an unweighted comparison of monthly means, not a day-weighted annual average; it summarizes the overall monthly pattern without claiming that every month had less sunshine. The largest monthly decrease was in October, with a difference of -1.02 hours/day in mean daily sunshine duration.

Changes in snowfall

Mean daily snowfall averaged across calendar months shows a difference of -0.01 mm/day compared with the earlier reference period. This small difference at the displayed precision describes the unweighted mean of monthly daily amounts; it does not establish that snowfall was absent or that each month changed in the same way. The largest monthly decrease was in February, a difference of -0.18 mm/day, while January had the largest increase, a difference of +0.01 mm/day. These month-specific contrasts put the near-unchanged overall rounded mean in context.