May weather forecast and climate
São João da Ribeira, Portugal

Weather in May

The last month of the spring, May, is a warm month in São João da Ribeira, Portugal, with average temperature fluctuating between 12.7°C (54.9°F) and 23.8°C (74.8°F).

Temperature

In May, the average high-temperature marginally rises, from a comfortable 19.8°C (67.6°F) in April, to a moderately hot 23.8°C (74.8°F). The average low-temperature, is 12.7°C (54.9°F).

Humidity

In May, the average relative humidity is 67%.

Rainfall

In São João da Ribeira, during 8.3 rainfall days, 24mm (0.94") of precipitation is typically accumulated. Throughout the year, in São João da Ribeira, there are 108.1 rainfall days, and 337mm (13.27") of precipitation is accumulated.

Daylight

In São João da Ribeira, Portugal, the average length of the day is 14.3h.

Sunshine

The average sunshine in May is 10.2h.

UV index

The average daily maximum UV index in May is 5. A UV Index estimate of 3 to 5 represents a medium health hazard from the exposure to the Sun's UV radiation for the ordinary person.
Note: The daily maximum UV index of 5 in May interpret into the following advice:
Take precautions - Protection against sunburn is recommended. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
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FAQ

What is the temperature in May in São João da Ribeira?

In São João da Ribeira, in May, the average high-temperature is 23.8°C (74.8°F), and the average low-temperature is 12.7°C (54.9°F).

What is the average humidity in May in São João da Ribeira?

In May, the average relative humidity in São João da Ribeira, Portugal, is 67%.

How many days does it rain in May in São João da Ribeira?

In May, in São João da Ribeira, the rain falls for 8.3 days. Throughout May, 24mm (0.94") of precipitation is accumulated.

What is the average length of the day in May in São João da Ribeira?

In São João da Ribeira, the average length of the day in May is 14.3h.

How many hours of sunshine does São João da Ribeira have in May?

The average sunshine in May is 10.2h.

What is the UV index intensity in May in São João da Ribeira?

The average daily maximum UV index in May in São João da Ribeira, Portugal, is 5. A UV Index of 3 to 5 symbolizes a moderate health threat from the exposure to the Sun's UV rays.

Average temperature in May
São João da Ribeira, Portugal

Average temperature in May - São João da Ribeira, Portugal
  • Average high temperature in May: 23.8°C

The warmest month (with the highest average high temperature) is August (31°C).
The month with the lowest average high temperature is January (14°C).

  • Average low temperature in May: 12.7°C

The month with the highest average low temperature is July (15.8°C).
The coldest months (with the lowest average low temperature) are January and February (6.8°C).

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Average pressure in May
São João da Ribeira, Portugal

Average pressure in May - São João da Ribeira, Portugal
  • Average pressure in May: 1016.2mbar

The month with the highest atmospheric pressure is December (1022.6mbar).
The month with the lowest atmospheric pressure is April (1015.5mbar).

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Average wind speed in May
São João da Ribeira, Portugal

Average wind speed in May - São João da Ribeira, Portugal
  • Average wind speed in May: 12.5km/h

The windiest month (with the highest average wind speed) is July (13.2km/h).
The calmest months (with the lowest average wind speed) are September and October (10.6km/h).

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Average humidity in May
São João da Ribeira, Portugal

Average humidity in May - São João da Ribeira, Portugal
  • Average humidity in May: 67%

The month with the highest relative humidity is January (81%).
The month with the lowest relative humidity is August (62%).

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Average rainfall in May
São João da Ribeira, Portugal

Average rainfall in May - São João da Ribeira, Portugal
  • Average rainfall in May: 24mm

The wettest month (with the highest rainfall) is November (53mm).
The driest months (with the least rainfall) are July and August (3mm).

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Average rainfall days in May
São João da Ribeira, Portugal

Average rainfall days in May - São João da Ribeira, Portugal
  • Average rainfall days in May: 8.3 days

The month with the highest number of rainy days is November (13.9 days).
The month with the least rainy days is August (2.4 days).

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Average daylight in May /
Average sunshine in May
São João da Ribeira, Portugal

Average daylight in May / Average sunshine in May - São João da Ribeira, Portugal
  • Average daylight in May: 14.3h

The month with the longest days is June (Average daylight: 14.9h).
The month with the shortest days is December (Average daylight: 9.5h).

  • Average sunshine in May: 10.2h

The month with the most sunshine is July (Average sunshine: 11.2h).
The month with the least sunshine is January (Average sunshine: 5.2h).

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Average sunshine days in May
São João da Ribeira, Portugal

Average sunshine days in May - São João da Ribeira, Portugal
  • Average sunshine days in May: 21.3 days

The month with the most sunshine days is July (27.3 days).
Months with the least sunshine days are April and November (14.6 days).

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Average UV index in May
São João da Ribeira, Portugal

Average UV index in May - São João da Ribeira, Portugal
  • Average UV index in May: 5

Months with the highest UV index are June, July and August (UV index 6).
Months with the lowest UV index are January, February, November and December (UV index 3).

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Average cloud cover in May
São João da Ribeira, Portugal

Average cloud cover in May - São João da Ribeira, Portugal
  • Average cloud cover in May: 27

The month with the most cloud cover is January (Cloud cover 42).
The month with the least cloud cover is August (Cloud cover 17).

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Average visibility in May
São João da Ribeira, Portugal

Average visibility in May - São João da Ribeira, Portugal
  • Average visibility in May: 9km

The month with the highest visibility is June (10km).
Months with the lowest visibility are January, February, March, April, May, July, August, September, October, November and December (9km).

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