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Castelo Branco, Portugal climate
Csa Hot-summer Mediterranean
Castelo Branco has a seasonal mild-temperate climate (Hot-summer Mediterranean, Köppen Csa). The hottest month is August with an average daily high near 33°C, while the coldest is January averaging around 5°C at night. Precipitation totals about 705 mm a year and is strongly seasonal — November alone averages 105 mm while August barely receives 7 mm.
Temperature & precipitation
Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figuresHours of sunshine per day
Estimated sunny hours each month — daylight length × clear-sky fraction · 1991–2020 monthly cloud cover (NASA POWER)Castelo Branco climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 12 | 14 | 17 | 19 | 24 | 29 | 32 | 33 | 28 | 22 | 16 | 13 |
| Avg temp (°C) | 9 | 10 | 12 | 14 | 18 | 22 | 25 | 25 | 22 | 17 | 12 | 9 |
| Avg low (°C) | 5 | 5 | 7 | 9 | 12 | 15 | 17 | 18 | 16 | 12 | 8 | 5 |
| Precipitation (mm) | 72 | 62 | 73 | 66 | 46 | 16 | 8 | 7 | 43 | 104 | 105 | 103 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 12 | 14 | 17 | 19 | 24 | 29 |
| Avg temp (°C) | 9 | 10 | 12 | 14 | 18 | 22 |
| Avg low (°C) | 5 | 5 | 7 | 9 | 12 | 15 |
| Precipitation (mm) | 72 | 62 | 73 | 66 | 46 | 16 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 32 | 33 | 28 | 22 | 16 | 13 |
| Avg temp (°C) | 25 | 25 | 22 | 17 | 12 | 9 |
| Avg low (°C) | 17 | 18 | 16 | 12 | 8 | 5 |
| Precipitation (mm) | 8 | 7 | 43 | 104 | 105 | 103 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 53 | 50 | 51 | 55 | 50 | 36 | 22 | 25 | 38 | 50 | 51 | 57 |
| Relative humidity (%) | 87 | 83 | 78 | 75 | 69 | 58 | 44 | 43 | 52 | 70 | 84 | 88 |
| Wind speed (km/h) | 8.1 | 8.3 | 8.8 | 8.8 | 8.5 | 8.8 | 9.7 | 9.5 | 8.3 | 8.3 | 8.4 | 8.2 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 53 | 50 | 51 | 55 | 50 | 36 |
| Relative humidity (%) | 87 | 83 | 78 | 75 | 69 | 58 |
| Wind speed (km/h) | 8.1 | 8.3 | 8.8 | 8.8 | 8.5 | 8.8 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 22 | 25 | 38 | 50 | 51 | 57 |
| Relative humidity (%) | 44 | 43 | 52 | 70 | 84 | 88 |
| Wind speed (km/h) | 9.7 | 9.5 | 8.3 | 8.3 | 8.4 | 8.2 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 25 years of daily observations at Castelo Branco, a weather station, about 1 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.