Contents
- Weather in May
- Frequently asked questions
- Average temperature in May
- Average pressure in May
- Average wind speed in May
- Average humidity in May
- Average rainfall in May
- Average rainfall days in May
- Average daylight in May
- Average sunshine in May
- Average sunshine days in May
- Average UV index in May
- Average cloud cover in May
- Average visibility in May
Weather in May
Temperature
May begins with an average high-temperature of a still refreshing 17.1°C (62.8°F), reflecting close similarity to the preceding month. Ribeiras's nighttime temperature in May consistently rests at a moderate 15.5°C (59.9°F).Humidity
The average relative humidity in May in Ribeiras, Portugal, is 81%.Rainfall
In Ribeiras, Portugal, in May, during 17.1 rainfall days, 63mm (2.48") of precipitation is typically accumulated. Throughout the year, there are 204.1 rainfall days, and 744mm (29.29") of precipitation is accumulated.Daylight
In May, the average length of the day is 14h and 16min.On the first day of the month, sunrise is at 06:54 and sunset at 20:44. On the last day of May, sunrise is at 06:30 and sunset at 21:10 +00.
Sunshine
The average sunshine in May is 7.6h.UV index
The months with the lowest UV index in Ribeiras are January through May, November and December, with an average maximum UV index of 4. A UV Index estimate of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for the ordinary person.Note: The maximum UV index of 4 during May translates into these guidelines:
Ensure safety - Sun damage prevention is strongly urged. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. Experience reduced UV exposure by about half when donning a wide-brim hat.
Frequently asked questions
What are May temperatures in Ribeiras?
What is the average humidity in May in Ribeiras?
How many days does it rain in May in Ribeiras?
How many hours of daylight does Ribeiras have in May?
When is the sunrise / sunset in May in Ribeiras?
How long on average sun shines in May in Ribeiras?
What is the month with the lowest UV index in Ribeiras?
How high is the UV index in May in Ribeiras?
Average temperature in May
Ribeiras, Portugal
- Average high temperature in May: 17.1°C
The warmest month (with the highest average high temperature) is August (22.8°C).
The month with the lowest average high temperature is March (15.3°C).
- Average low temperature in May: 15.5°C
The month with the highest average low temperature is August (21.2°C).
The coldest month (with the lowest average low temperature) is March (13.8°C).
Average pressure in May
Ribeiras, Portugal
- Average pressure in May: 1021.2mbar
The month with the highest atmospheric pressure is July (1024.6mbar).
The month with the lowest atmospheric pressure is October (1016.8mbar).
Average wind speed in May
Ribeiras, Portugal
- Average wind speed in May: 20.3km/h
The windiest month (with the highest average wind speed) is December (25.6km/h).
The calmest month (with the lowest average wind speed) is July (14.4km/h).
Average humidity in May
Ribeiras, Portugal
- Average humidity in May: 81%
The month with the highest relative humidity is June (83%).
The months with the lowest relative humidity are September and November (78%).
Average rainfall in May
Ribeiras, Portugal
- Average rainfall in May: 63mm
The wettest month (with the highest rainfall) is December (116mm).
The driest month (with the least rainfall) is July (26mm).
Average rainfall days in May
Ribeiras, Portugal
- Average rainfall days in May: 17.1 days
The month with the highest number of rainy days is October (20 days).
The month with the least rainy days is July (13.6 days).
Average daylight in May /
Average sunshine in May
Ribeiras, Portugal
- Average daylight in May: 14h and 2min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in May: 7h and 4min
The month with the most sunshine is July (Average sunshine: 9h and 6min).
The month with the least sunshine is December (Average sunshine: 4h and 36min).
Average sunshine days in May
Ribeiras, Portugal
- Average sunshine days in May: 7.8 days
The month with the most sunshine days is July (11 days).
The months with the least sunshine days are February and December (6.3 days).
Average UV index in May
Ribeiras, Portugal
- Average UV index in May: 4
The months with the highest UV index are July and August (UV index 6).
The months with the lowest UV index are January, February, March, April, May, November and December (UV index 4).
Average cloud cover in May
Ribeiras, Portugal
- Average cloud cover in May: 53
The months with the most cloud cover are January, March, November and December (Cloud cover 54).
The month with the least cloud cover is August (Cloud cover 42).
Average visibility in May
Ribeiras, 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).
Ribeiras, Portugal
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