Viseu, Portugal climate

Csb Warm-summer Mediterranean

Viseu has a seasonal mild-temperate climate (Warm-summer Mediterranean, Köppen Csb). The hottest month is August with an average daily high near 83°F, while the coldest is January averaging around 39°F at night. Precipitation totals about 44 inches a year and is strongly seasonal — December alone averages 6.5 inches while July barely receives 0.57 inches.

☀️ Summers

Warm

Highs near 83°F in August.

❄️ Winters

Chilly

Lows near 39°F in January.

🌧️ Rain

Wet

About 44 in of rain a year.

Wettest in December

⛅ Sky & trend

Partly cloudy

A roughly even mix of sun and cloud.

Temperature & precipitation

Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figures

Hours of sunshine per day

Estimated sunny hours each month — daylight length × clear-sky fraction · 1991–2020 monthly cloud cover (NASA POWER)

Viseu climate normals (1991–2020)

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°F)	51	54	58	61	68	76	82	83	77	66	56	52
Avg temp (°F)	45	47	50	53	59	65	70	71	67	59	50	46
Avg low (°F)	39	40	43	45	50	55	58	59	57	52	44	41
Precipitation (in)	5.7	3.8	4.9	4.6	2.8	1.2	0.6	0.8	2.1	6.0	5.2	6.5

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Avg high (°F)	51	54	58	61	68	76
Avg temp (°F)	45	47	50	53	59	65
Avg low (°F)	39	40	43	45	50	55
Precipitation (in)	5.7	3.8	4.9	4.6	2.8	1.2

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°F)	82	83	77	66	56	52
Avg temp (°F)	70	71	67	59	50	46
Avg low (°F)	58	59	57	52	44	41
Precipitation (in)	0.6	0.8	2.1	6.0	5.2	6.5

Sky & atmosphere

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	59	54	55	61	56	44	30	32	44	55	58	61
Relative humidity (%)	88	84	80	78	74	64	54	53	61	74	86	88
Wind speed (mph)	0.4	0.4	0.4	0.4	0.3	0.3	0.2	0.3	0.4	0.4	0.4	0.4

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Cloud cover (%)	59	54	55	61	56	44
Relative humidity (%)	88	84	80	78	74	64
Wind speed (mph)	0.4	0.4	0.4	0.4	0.3	0.3

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	30	32	44	55	58	61
Relative humidity (%)	54	53	61	74	86	88
Wind speed (mph)	0.2	0.3	0.4	0.4	0.4	0.4

Methodology & sources

Temperature & precipitation — 1991–2020 normals computed from 23 years of daily observations at Viseu, a weather station, about 7 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.

How we build these numbers →