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 snowfall in May
- Average snowfall 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
With the onset of May, Penalva do Castelo's average high-temperature sees a modest rise, moving from April's comfortable 17°C (62.6°F) to a pleasant 21.2°C (70.2°F). Despite the hot May days, Penalva do Castelo's nights see an average temperature plunge to a chilly 9°C (48.2°F).Humidity
The average relative humidity in May is 71%.Rainfall
In Penalva do Castelo, Portugal, during May, the rain falls for 10.9 days and regularly aggregates up to 31mm (1.22") of precipitation. Throughout the year, there are 125.6 rainfall days, and 558mm (21.97") of precipitation is accumulated.Snowfall
April through October and December are months without snowfall.Daylight
The average length of the day in May is 14h and 28min.On the first day of May in Penalva do Castelo, sunrise is at 06:28 and sunset at 20:27. On the last day of the month, sunrise is at 06:02 and sunset at 20:55 WEST.
Sunshine
In Penalva do Castelo, the average sunshine in May is 9.6h.UV index
In May, the average daily maximum UV index is 5. A UV Index estimate of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for the ordinary person.Note: A daily maximum UV index of 5 in May translates into the following instructions:
Undertake protective steps - Preventing sun damage is advised. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average May temperature?
What is the average humidity in May?
How many days does it rain in May?
When it does not snow?
What is the average length of the day in May?
When is the sunrise / sunset in May?
How many hours of sunshine does Penalva do Castelo have in May?
What is the UV index intensity in May?
Average temperature in May
Penalva do Castelo, Portugal
- Average high temperature in May: 21.2°C
The warmest month (with the highest average high temperature) is August (29.6°C).
The month with the lowest average high temperature is January (10.7°C).
- Average low temperature in May: 9°C
The month with the highest average low temperature is August (13.5°C).
The coldest month (with the lowest average low temperature) is January (3.1°C).
Average pressure in May
Penalva do Castelo, Portugal
- Average pressure in May: 1016.2mbar
The month with the highest atmospheric pressure is December (1022.9mbar).
The month with the lowest atmospheric pressure is April (1015.2mbar).
Average wind speed in May
Penalva do Castelo, Portugal
- Average wind speed in May: 8.1km/h
The windiest month (with the highest average wind speed) is March (9.1km/h).
The calmest month (with the lowest average wind speed) is September (7.1km/h).
Average humidity in May
Penalva do Castelo, Portugal
- Average humidity in May: 71%
The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is August (57%).
Average rainfall in May
Penalva do Castelo, Portugal
- Average rainfall in May: 31mm
The wettest month (with the highest rainfall) is December (92mm).
The driest month (with the least rainfall) is July (6mm).
Average rainfall days in May
Penalva do Castelo, Portugal
- Average rainfall days in May: 10.9 days
The month with the highest number of rainy days is November (15.5 days).
The month with the least rainy days is August (3.3 days).
Average snowfall in May
Penalva do Castelo, Portugal
- Average snowfall in May: 0mm
The months with the highest snowfall are January and February (3mm).
The months with the least snowfall are April, May, June, July, August, September, October and December (0mm).
Average snowfall days in May
Penalva do Castelo, Portugal
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is January (0.4 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in May /
Average sunshine in May
Penalva do Castelo, Portugal
- Average daylight in May: 14h and 3min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in May: 9h and 4min
The month with the most sunshine is July (Average sunshine: 11h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 42min).
Average sunshine days in May
Penalva do Castelo, Portugal
- Average sunshine days in May: 18.3 days
The month with the most sunshine days is August (26.8 days).
The month with the least sunshine days is April (13 days).
Average UV index in May
Penalva do Castelo, Portugal
- Average UV index in May: 5
The months with the highest UV index are July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in May
Penalva do Castelo, Portugal
- Average cloud cover in May: 36
The month with the most cloud cover is January (Cloud cover 52).
The months with the least cloud cover are July and August (Cloud cover 17).
Average visibility in May
Penalva do Castelo, Portugal
- Average visibility in May: 8km
The months with the highest visibility are June, July, August and September (9km).
The months with the lowest visibility are January and November (7km).
