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Barreiro, Portugal climate
Csa Hot-summer Mediterranean
Barreiro has a mildly seasonal mild-temperate climate (Hot-summer Mediterranean, Köppen Csa). The hottest month is August with an average daily high near 83°F, while the coldest is January averaging around 48°F at night. Precipitation totals about 29 inches a year and is strongly seasonal — October alone averages 4.4 inches while July barely receives 0.10 inches.
Temperature & precipitation
Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figuresClear vs cloudy days
Share of days each month that are clear, partly cloudy or cloudy · 1991–2020 · hover a month for the day countsBarreiro climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 59 | 61 | 65 | 68 | 73 | 78 | 82 | 83 | 79 | 73 | 64 | 59 |
| Avg temp (°F) | 53 | 55 | 59 | 61 | 65 | 70 | 73 | 75 | 71 | 66 | 59 | 54 |
| Avg low (°F) | 48 | 49 | 52 | 54 | 58 | 62 | 65 | 66 | 64 | 60 | 53 | 49 |
| Precipitation (in) | 4.0 | 2.5 | 2.9 | 2.6 | 2.2 | 0.5 | 0.1 | 0.3 | 1.4 | 4.4 | 3.9 | 4.0 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°F) | 59 | 61 | 65 | 68 | 73 | 78 |
| Avg temp (°F) | 53 | 55 | 59 | 61 | 65 | 70 |
| Avg low (°F) | 48 | 49 | 52 | 54 | 58 | 62 |
| Precipitation (in) | 4.0 | 2.5 | 2.9 | 2.6 | 2.2 | 0.5 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°F) | 82 | 83 | 79 | 73 | 64 | 59 |
| Avg temp (°F) | 73 | 75 | 71 | 66 | 59 | 54 |
| Avg low (°F) | 65 | 66 | 64 | 60 | 53 | 49 |
| Precipitation (in) | 0.1 | 0.3 | 1.4 | 4.4 | 3.9 | 4.0 |
How often — frequency of weather events
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 12 | 10 | 9 | 10 | 7 | 3 | 1 | 2 | 5 | 11 | 12 | 12 |
| Days with high ≥ 90°F (days) | — | — | — | 0.0 | 0.6 | 2 | 4 | 5 | 1 | 0.1 | — | — |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 12 | 10 | 9 | 10 | 7 | 3 |
| Days with high ≥ 90°F (days) | — | — | — | 0.0 | 0.6 | 2 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 1 | 2 | 5 | 11 | 12 | 12 |
| Days with high ≥ 90°F (days) | 4 | 5 | 1 | 0.1 | — | — |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 60 | 58 | 58 | 58 | 53 | 48 | 43 | 41 | 48 | 57 | 60 | 62 |
| Clear days (≤ 30% cloud) | 7 | 7 | 7 | 6 | 8 | 9 | 11 | 11 | 8 | 7 | 7 | 7 |
| Partly cloudy days (30–70%) | 10 | 10 | 11 | 13 | 13 | 14 | 15 | 16 | 15 | 12 | 9 | 9 |
| Cloudy days (≥ 70%) | 14 | 12 | 13 | 12 | 10 | 7 | 5 | 4 | 7 | 12 | 14 | 15 |
| Relative humidity (%) | 81 | 80 | 80 | 79 | 79 | 80 | 80 | 80 | 81 | 81 | 81 | 82 |
| Wind speed (mph) | 10.8 | 10.9 | 10.5 | 10.5 | 10.2 | 10.2 | 10.8 | 9.9 | 9.0 | 9.6 | 10.8 | 11.2 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 60 | 58 | 58 | 58 | 53 | 48 |
| Clear days (≤ 30% cloud) | 7 | 7 | 7 | 6 | 8 | 9 |
| Partly cloudy days (30–70%) | 10 | 10 | 11 | 13 | 13 | 14 |
| Cloudy days (≥ 70%) | 14 | 12 | 13 | 12 | 10 | 7 |
| Relative humidity (%) | 81 | 80 | 80 | 79 | 79 | 80 |
| Wind speed (mph) | 10.8 | 10.9 | 10.5 | 10.5 | 10.2 | 10.2 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 43 | 41 | 48 | 57 | 60 | 62 |
| Clear days (≤ 30% cloud) | 11 | 11 | 8 | 7 | 7 | 7 |
| Partly cloudy days (30–70%) | 15 | 16 | 15 | 12 | 9 | 9 |
| Cloudy days (≥ 70%) | 5 | 4 | 7 | 12 | 14 | 15 |
| Relative humidity (%) | 80 | 80 | 81 | 81 | 81 | 82 |
| Wind speed (mph) | 10.8 | 9.9 | 9.0 | 9.6 | 10.8 | 11.2 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 29 years of daily observations at Lisboa Geofisica, a weather station, about 9 km from the city centre. The underlying daily records come from NOAA's global station network.
Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.