Porto, Portugal: Annual Weather Averages
July is the hottest month in Porto with an average temperature of 19.5°C (67°F) and the coldest is January at 10°C (50°F) with the most daily sunshine hours at 10 in July. The wettest month is December with an average of 180mm of rain. The best month to swim in the sea is in September when the average sea temperature is 18.1°C (65°F).
Average Temperature: Porto
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| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| °C | 10 | 11 | 12 | 13 | 15 | 18 | 20 | 19 | 19 | 16 | 13 | 12 |
| °F | 50 | 51 | 54 | 55 | 59 | 64 | 67 | 66 | 66 | 61 | 55 | 53 |
Average High/Low Temperature: Porto
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| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| High °C | 14 | 14 | 16 | 17 | 19 | 22 | 24 | 24 | 24 | 20 | 17 | 15 |
| Low °C | 6 | 7 | 8 | 9 | 11 | 13 | 15 | 14 | 14 | 12 | 9 | 8 |
| High °F | 57 | 57 | 61 | 63 | 66 | 72 | 75 | 75 | 75 | 68 | 63 | 59 |
| Low °F | 43 | 45 | 46 | 48 | 52 | 55 | 59 | 57 | 57 | 54 | 48 | 46 |
Average Day/Night Temperature: Porto
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| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Day °C | 11 | 11 | 13 | 14 | 17 | 19 | 20 | 20 | 19 | 18 | 14 | 12 |
| Night °C | 10 | 10 | 11 | 13 | 15 | 17 | 18 | 18 | 18 | 16 | 12 | 10 |
| Day °F | 52 | 52 | 55 | 58 | 62 | 65 | 68 | 68 | 67 | 64 | 57 | 54 |
| Night °F | 49 | 50 | 52 | 55 | 59 | 62 | 64 | 65 | 64 | 61 | 54 | 51 |
Average Rainfall: Porto
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| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| mm | 110 | 160 | 90 | 100 | 70 | 40 | 20 | 20 | 60 | 160 | 150 | 180 |
| Days | 15 | 12 | 12 | 15 | 15 | 8 | 7 | 7 | 10 | 15 | 15 | 17 |
Average Daily Sunshine Hours: Porto
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| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Hours | 4 | 6 | 7 | 7 | 8 | 10 | 10 | 9 | 7 | 6 | 4 | 3 |
Average Sea Temperature: Porto
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| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| °C | 14 | 14 | 14 | 15 | 17 | 17 | 17 | 18 | 18 | 18 | 17 | 16 |
| °F | 58 | 57 | 57 | 59 | 62 | 63 | 63 | 64 | 65 | 64 | 63 | 60 |
