Cascais, Portugal: Annual Weather Averages

August is the hottest month in Cascais with an average temperature of 23.25°C (74°F) and the coldest is January at 11.7°C (53°F) with the most daily sunshine hours at 11 in August. The wettest month is November with an average of 113.9mm of rain. The best month to swim in the sea is in August when the average sea temperature is 20.96897333°C (70°F).

Average Temperature: Cascais

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  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 12 13 14 15 18 21 23 23 22 19 15 12
°F 53 55 58 60 64 69 73 74 72 66 59 54

Average High/Low Temperature: Cascais

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  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
High °C 15 16 18 19 22 25 28 28 27 23 18 15
High °F 59 61 64 67 72 77 82 83 80 73 65 59
Low °C 9 9 10 12 14 16 18 18 18 15 12 9
Low °F 47 49 51 53 56 61 64 65 64 59 53 49

Average Rainfall: Cascais

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  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 108 109 66 65 38 20 5 6 26 80 114 108
Days 11 11 9 9 8 24 26 27 24 9 10 11

Average Daily Sunshine Hours: Cascais

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  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hours 5 7 7 8 9 11 11 11 8 6 5 4

Average Sea Temperature: Cascais

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  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 16 16 16 16 17 19 20 21 20 20 19 17
°F 61 60 60 61 63 66 68 70 69 67 66 63

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