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
May
Weather in May
Temperature
May's arrival brings a slight change in high-temperatures, adjusting from an enjoyable 17.8°C (64°F) in April to an agreeable 21.1°C (70°F). An average nighttime temperature of 11.5°C (52.7°F) is observed in Alfena, Portugal, during May.Humidity
The average relative humidity in May is 70%.Rainfall
In Alfena, Portugal, in May, it is raining for 10.3 days, with typically 37mm (1.46") of accumulated precipitation. In Alfena, during the entire year, the rain falls for 126.3 days and collects up to 777mm (30.59") of precipitation.Daylight
In Alfena, the average length of the day in May is 14h and 31min.On the first day of the month, sunrise is at 06:30 and sunset at 20:31. On the last day of May, in Alfena, sunrise is at 06:03 and sunset at 21:00 WEST.
Sunshine
The average sunshine in May is 9.8h.UV index
In May, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: The maximum daily UV index of 5 in May interprets into the following recommendations:
Preventative actions are necessary - Recommendations to ward off sunburn are given. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Alfena in May?
What is the average humidity in May in Alfena?
How much does it rain in Alfena in May?
How many hours of daylight does Alfena have in May?
When are sunrise and sunset in May in Alfena?
How long on average sun shines in May in Alfena?
How high is the UV index in May in Alfena?
Average temperature in May
Alfena, Portugal
- Average high temperature in May: 21.1°C
The warmest month (with the highest average high temperature) is August (26.6°C).
The month with the lowest average high temperature is January (12.7°C).
- Average low temperature in May: 11.5°C
The months with the highest average low temperature are July and August (15.3°C).
The coldest months (with the lowest average low temperature) are January and February (6.8°C).
Average pressure in May
Alfena, Portugal
- Average pressure in May: 1016.5mbar
The month with the highest atmospheric pressure is December (1022.5mbar).
The month with the lowest atmospheric pressure is April (1015.3mbar).
Average wind speed in May
Alfena, Portugal
- Average wind speed in May: 9.3km/h
The windiest month (with the highest average wind speed) is February (10.3km/h).
The calmest month (with the lowest average wind speed) is September (7.9km/h).
Average humidity in May
Alfena, Portugal
- Average humidity in May: 70%
The month with the highest relative humidity is January (82%).
The month with the lowest relative humidity is September (65%).
Average rainfall in May
Alfena, Portugal
- Average rainfall in May: 37mm
The wettest month (with the highest rainfall) is November (124mm).
The driest month (with the least rainfall) is July (10mm).
Average rainfall days in May
Alfena, Portugal
- Average rainfall days in May: 10.3 days
The month with the highest number of rainy days is November (15.6 days).
The month with the least rainy days is August (5 days).
Average daylight in May /
Average sunshine in May
Alfena, Portugal
- Average daylight in May: 14h and 3min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in May: 9h and 5min
The month with the most sunshine is July (Average sunshine: 11h and 0min).
The month with the least sunshine is January (Average sunshine: 4h and 54min).
Average sunshine days in May
Alfena, Portugal
- Average sunshine days in May: 19.4 days
The month with the most sunshine days is August (24.2 days).
The month with the least sunshine days is November (12.5 days).
Average UV index in May
Alfena, Portugal
- Average UV index in May: 5
The month with the highest UV index is August (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 3).
Average cloud cover in May
Alfena, Portugal
- Average cloud cover in May: 31
The month with the most cloud cover is January (Cloud cover 47).
The month with the least cloud cover is August (Cloud cover 22).
Average visibility in May
Alfena, Portugal
- Average visibility in May: 9km
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (9km).
The month with the lowest visibility is January (8km).
