May weather forecast
São Martinho, Portugal

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Weather in May

May, the last month of the spring in São Martinho, is another refreshing month, with an average temperature varying between 18.8°C (65.8°F) and 17.3°C (63.1°F).

Temperature

With the transition into May, São Martinho notes an average high-temperature of a still refreshing 18.8°C (65.8°F), closely resembling April. São Martinho's average temperature throughout the nights in May exhibits a minor decrease from daytime highs, stabilizing at a still refreshing 17.3°C (63.1°F).

Humidity

In May, the average relative humidity in São Martinho is 77%.

Rainfall

In São Martinho, during May, the rain falls for 7.6 days and regularly aggregates up to 9mm (0.35") of precipitation. Throughout the year, in São Martinho, there are 116.4 rainfall days, and 232mm (9.13") of precipitation is accumulated.

Daylight

In May, the average length of the day in São Martinho, Portugal, is 13h and 50min.
On the first day of the month, sunrise is at 07:20 and sunset at 20:49. On the last day of May, sunrise is at 07:00 and sunset at 21:10 WEST.

Sunshine

In May, the average sunshine in São Martinho is 8.5h.

UV index

The months with the lowest UV index are January through June, November and December, with an average maximum UV index of 5. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for the ordinary person.
Note: A daily high UV index of 5 in May leads to these guidelines:
Heed the precautions - It is counselled to guard against solar damage. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly.
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Frequently asked questions

What is the usual temperature for São Martinho in May?

The average high-temperature, in May, in São Martinho, is 18.8°C (65.8°F), while the average low-temperature is 17.3°C (63.1°F).

What is the average humidity in May in São Martinho?

In São Martinho, the average relative humidity in May is 77%.

How much does it rain in São Martinho in May?

In May, in São Martinho, the rain falls for 7.6 days. Throughout May, 9mm (0.35") of precipitation is accumulated.

What is the average length of the day in May in São Martinho?

In May, the average day length is 13h and 50min.

When is the sunrise / sunset in May in São Martinho?

On the first day of May in São Martinho, sunrise is at 07:20 and sunset at 20:49. On the last day of the month, sunrise is at 07:00 and sunset at 21:10 WEST.

How many hours of sunshine does São Martinho have in May?

In May, the average sunshine duration is 8.5h.

What are the months with the lowest UV index in São Martinho?

The months with the lowest UV index in São Martinho are January through June, November and December, with an average maximum UV index of 5.

What is the UV index intensity in May in São Martinho?

In May, the average daily maximum UV index in São Martinho, Portugal, is 5. A UV Index estimate of 3 to 5 represents a moderate health threat from exposure to Sun's UV rays.

Average temperature in May
São Martinho, Portugal

Average temperature in May - São Martinho, Portugal
  • Average high temperature in May: 18.8°C

The warmest month (with the highest average high temperature) is August (23°C).
The months with the lowest average high temperature are February and March (16.9°C).

  • Average low temperature in May: 17.3°C

The month with the highest average low temperature is September (21.7°C).
The coldest month (with the lowest average low temperature) is March (15.1°C).

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Average pressure in May
São Martinho, Portugal

Average pressure in May - São Martinho, Portugal
  • Average pressure in May: 1019.2mbar

The month with the highest atmospheric pressure is January (1024.1mbar).
The month with the lowest atmospheric pressure is October (1017mbar).

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Average wind speed in May
São Martinho, Portugal

Average wind speed in May - São Martinho, Portugal
  • Average wind speed in May: 20.1km/h

The windiest month (with the highest average wind speed) is February (23km/h).
The calmest month (with the lowest average wind speed) is September (17.7km/h).

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Average humidity in May
São Martinho, Portugal

Average humidity in May - São Martinho, Portugal
  • Average humidity in May: 77%

The months with the highest relative humidity are June and August (80%).
The month with the lowest relative humidity is February (73%).

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Average rainfall in May
São Martinho, Portugal

Average rainfall in May - São Martinho, Portugal
  • Average rainfall in May: 9mm

The wettest month (with the highest rainfall) is October (44mm).
The driest month (with the least rainfall) is August (3mm).

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Average rainfall days in May
São Martinho, Portugal

Average rainfall days in May - São Martinho, Portugal
  • Average rainfall days in May: 7.6 days

The month with the highest number of rainy days is November (16 days).
The month with the least rainy days is August (3.9 days).

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Average daylight in May /
Average sunshine in May
São Martinho, Portugal

Average daylight in May / Average sunshine in May - São Martinho, Portugal
  • Average daylight in May: 13h and 5min

The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).

  • Average sunshine in May: 8h and 3min

The month with the most sunshine is June (Average sunshine: 9h and 12min).
The months with the least sunshine are January and December (Average sunshine: 7h and 36min).

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Average sunshine days in May
São Martinho, Portugal

Average sunshine days in May - São Martinho, Portugal
  • Average sunshine days in May: 15.3 days

The month with the most sunshine days is August (20.9 days).
The month with the least sunshine days is November (8.4 days).

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Average UV index in May
São Martinho, Portugal

Average UV index in May - São Martinho, Portugal
  • Average UV index in May: 5

The months with the highest UV index are July, August, September and October (UV index 6).
The months with the lowest UV index are January, February, March, April, May, June, November and December (UV index 5).

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Average cloud cover in May
São Martinho, Portugal

Average cloud cover in May - São Martinho, Portugal
  • Average cloud cover in May: 33

The month with the most cloud cover is November (Cloud cover 41).
The month with the least cloud cover is August (Cloud cover 24).

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Average visibility in May
São Martinho, Portugal

Average visibility in May - São Martinho, Portugal
  • Average visibility in May: 10km

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

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São Martinho, Portugal

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