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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 91°F, while the coldest is January averaging around 40°F at night. Precipitation totals about 28 inches a year and is strongly seasonal — November alone averages 4.1 inches while August barely receives 0.28 inches.
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 (°F) | 54 | 58 | 63 | 67 | 75 | 84 | 90 | 91 | 83 | 72 | 60 | 55 |
| Avg temp (°F) | 47 | 50 | 54 | 57 | 64 | 72 | 77 | 77 | 72 | 63 | 53 | 48 |
| Avg low (°F) | 40 | 42 | 45 | 48 | 53 | 59 | 63 | 64 | 61 | 54 | 46 | 42 |
| Precipitation (in) | 2.8 | 2.4 | 2.9 | 2.6 | 1.8 | 0.6 | 0.3 | 0.3 | 1.7 | 4.1 | 4.1 | 4.1 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°F) | 54 | 58 | 63 | 67 | 75 | 84 |
| Avg temp (°F) | 47 | 50 | 54 | 57 | 64 | 72 |
| Avg low (°F) | 40 | 42 | 45 | 48 | 53 | 59 |
| Precipitation (in) | 2.8 | 2.4 | 2.9 | 2.6 | 1.8 | 0.6 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°F) | 90 | 91 | 83 | 72 | 60 | 55 |
| Avg temp (°F) | 77 | 77 | 72 | 63 | 53 | 48 |
| Avg low (°F) | 63 | 64 | 61 | 54 | 46 | 42 |
| Precipitation (in) | 0.3 | 0.3 | 1.7 | 4.1 | 4.1 | 4.1 |
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 (mph) | 5.0 | 5.2 | 5.5 | 5.5 | 5.3 | 5.5 | 6.0 | 5.9 | 5.1 | 5.1 | 5.2 | 5.1 |
| 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 (mph) | 5.0 | 5.2 | 5.5 | 5.5 | 5.3 | 5.5 |
| 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 (mph) | 6.0 | 5.9 | 5.1 | 5.1 | 5.2 | 5.1 |
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.