Climate Change Chart of Harbor, Portugal
Comprehensive Climate Change Chart of Harbor, Portugal: Monthly Averages and Impact Trends
For Harbor, Portugal, the climate data compare 1940–1950 with 2013–2023.
The unweighted mean difference across calendar months was +0.14 °C, a modest aggregate shift that does not mean temperatures rose in every month. These are monthly mean temperatures, not daytime maxima.
Overview of climate changes
Temperature changes
The unweighted mean difference across calendar months was +0.14 °C, a modest aggregate shift that does not mean temperatures rose in every month. These are monthly mean temperatures, not daytime maxima. The largest monthly increase was in December, at a difference of +1.95 °C; by contrast, June had the largest decrease, a difference of -1.64 °C. These opposing monthly results show why the overall mean does not describe each month individually.
Changes in sunshine duration
Mean daily sunshine duration averaged across calendar months showed a difference of -0.40 hours/day, indicating a lower aggregate in the more recent period without implying a decrease in every month. The largest monthly decrease was in October, at a difference of -0.80 hours/day. In February, sunshine instead recorded the largest monthly increase, though that difference was +0.01 hours/day. These figures compare daily mean hours and should not be read as describing every day.
Changes in rainfall
Mean daily rainfall, rather than monthly totals, was higher on average across calendar months by +0.50 mm/day. This unweighted mean of monthly differences is an aggregate comparison, not a claim that rainfall increased in every month. The largest monthly increase occurred in October, with a difference of +2.52 mm/day, while May recorded the largest decrease, at a difference of -0.91 mm/day. The contrasting monthly changes qualify the overall average and describe differences in mean daily amounts, not changes in monthly accumulation.
Changes in snowfall
Mean daily snowfall averaged across calendar months had a difference of -0.01 mm/day, a small decrease in the aggregate comparison. This unweighted mean of monthly means does not establish the direction of change in every month. The largest monthly decrease was in February, with a difference of -0.14 mm/day. These are daily mean amounts, not monthly snowfall totals, and the small aggregate difference should be understood at the precision represented by the data.
Climate Change Data Overview for Harbor, Portugal
Explore the comprehensive climate change data for Harbor, Portugal. This detailed table provides valuable insights into temperature variations, precipitation levels, and seasonal changes influenced by climate change, helping you understand the unique weather patterns of this region.
Temperature °C
| Month | ⌀ 1940 - 1950 | ⌀ 2013 - 2023 | +/- |
|---|---|---|---|
| Jan | 8.22 | 9.68 | 1.46 |
| Feb | 9.20 | 10.37 | 1.17 |
| Mar | 11.66 | 11.66 | -0.01 |
| Apr | 14.05 | 13.59 | -0.46 |
| May | 15.54 | 16.15 | 0.62 |
| Jun | 19.80 | 18.16 | -1.64 |
| Jul | 21.34 | 20.48 | -0.86 |
| Aug | 21.73 | 20.44 | -1.29 |
| Sep | 19.75 | 19.42 | -0.33 |
| Oct | 16.35 | 16.92 | 0.57 |
| Nov | 12.30 | 12.84 | 0.55 |
| Dec | 9.01 | 10.96 | 1.95 |
| ⌀ Month | 14.91 | 15.06 | 0.14 |
Sunshine (h) / day
| Month | ⌀ 1940 - 1950 | ⌀ 2013 - 2023 | +/- |
|---|---|---|---|
| Jan | 6.30 | 6.01 | -0.29 |
| Feb | 7.49 | 7.50 | 0.01 |
| Mar | 9.12 | 8.61 | -0.51 |
| Apr | 10.86 | 10.25 | -0.61 |
| May | 11.74 | 11.51 | -0.24 |
| Jun | 13.15 | 12.40 | -0.74 |
| Jul | 13.27 | 12.84 | -0.42 |
| Aug | 12.32 | 11.81 | -0.51 |
| Sep | 10.44 | 10.35 | -0.09 |
| Oct | 8.66 | 7.86 | -0.80 |
| Nov | 6.88 | 6.54 | -0.34 |
| Dec | 6.16 | 5.95 | -0.21 |
| ⌀ Month | 9.70 | 9.30 | -0.40 |
Rain (mm) / day
| Month | ⌀ 1940 - 1950 | ⌀ 2013 - 2023 | +/- |
|---|---|---|---|
| Jan | 5.65 | 5.45 | -0.20 |
| Feb | 4.82 | 4.50 | -0.33 |
| Mar | 4.30 | 4.89 | 0.59 |
| Apr | 3.58 | 4.32 | 0.74 |
| May | 3.54 | 2.64 | -0.91 |
| Jun | 1.23 | 1.52 | 0.28 |
| Jul | 0.39 | 0.48 | 0.09 |
| Aug | 0.69 | 0.46 | -0.23 |
| Sep | 1.62 | 2.50 | 0.88 |
| Oct | 3.42 | 5.94 | 2.52 |
| Nov | 4.05 | 5.89 | 1.84 |
| Dec | 5.17 | 5.86 | 0.68 |
| ⌀ Month | 3.21 | 3.70 | 0.50 |
Snow (mm) / day
| Month | ⌀ 1940 - 1950 | ⌀ 2013 - 2023 | +/- |
|---|---|---|---|
| Jan | 0.01 | 0.01 | -0.00 |
| Feb | 0.14 | 0.00 | -0.14 |
| Mar | 0.00 | 0.00 | 0.00 |
| Apr | 0.00 | 0.00 | 0.00 |
| May | 0.00 | 0.00 | 0.00 |
| Jun | 0.00 | 0.00 | 0.00 |
| Jul | 0.00 | 0.00 | 0.00 |
| Aug | 0.00 | 0.00 | 0.00 |
| Sep | 0.00 | 0.00 | 0.00 |
| Oct | 0.00 | 0.00 | 0.00 |
| Nov | 0.00 | 0.00 | 0.00 |
| Dec | 0.00 | 0.00 | 0.00 |
| ⌀ Month | 0.01 | 0.00 | -0.01 |
