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
As Alter do Chão transitions into May, the average high-temperature shows a change, moving from a comfortable 18.8°C (65.8°F) in April to a moderately hot 23.8°C (74.8°F). A stark contrast in day to night temperatures can be seen in May, with an average low-temperature of 11.7°C (53.1°F).Humidity
In May, the average relative humidity is 63%.Rainfall
In May, the rain falls for 6.5 days. Throughout May, 15mm (0.59") of precipitation is accumulated. In Alter do Chão, Portugal, during the entire year, the rain falls for 78.7 days and collects up to 219mm (8.62") of precipitation.Snowfall
In Alter do Chão, snow does not fall in April through December.Daylight
The average length of the day in May is 14h and 20min.On the first day of the month, sunrise is at 06:31 and sunset at 20:23. On the last day of May, sunrise is at 06:06 and sunset at 20:50 WEST.
Sunshine
In May, the average sunshine in Alter do Chão is 10.2h.UV index
The average daily maximum UV index in May in Alter do Chão is 6. A UV Index value of 6 to 7 symbolizes a high threat to health from unprotected exposure to Sun's UV rays for the average person.Note: In May, a daily UV index of 6 turns into the following recommendations:
Sustain precautions and conform to sun safety norms. Preventing sunburn is necessary. Between 10 a.m. and 4 p.m., UV radiation is strongest. Make an effort to avoid direct sunlight during this time, remembering that shade structures may not provide full sun protection. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average May temperature in Alter do Chão?
What is the average humidity in May in Alter do Chão?
How many days does it rain in May in Alter do Chão?
When it does not snow in Alter do Chão?
How many hours of daylight does Alter do Chão have in May?
What time are sunrise and sunset in May in Alter do Chão?
How long on average sun shines in May in Alter do Chão?
What is the UV index intensity in May in Alter do Chão?
Average temperature in May
Alter do Chão, Portugal
- Average high temperature in May: 23.8°C
The warmest month (with the highest average high temperature) is August (33.3°C).
The month with the lowest average high temperature is January (11.9°C).
- Average low temperature in May: 11.7°C
The month with the highest average low temperature is August (17.7°C).
The coldest month (with the lowest average low temperature) is January (4.2°C).
Average pressure in May
Alter do Chão, Portugal
- Average pressure in May: 1015.8mbar
The month with the highest atmospheric pressure is December (1023mbar).
The month with the lowest atmospheric pressure is April (1015.2mbar).
Average wind speed in May
Alter do Chão, Portugal
- Average wind speed in May: 10.4km/h
The windiest month (with the highest average wind speed) is February (12.1km/h).
The calmest month (with the lowest average wind speed) is September (8.4km/h).
Average humidity in May
Alter do Chão, Portugal
- Average humidity in May: 63%
The month with the highest relative humidity is January (83%).
The month with the lowest relative humidity is August (43%).
Average rainfall in May
Alter do Chão, Portugal
- Average rainfall in May: 15mm
The wettest month (with the highest rainfall) is November (39mm).
The driest month (with the least rainfall) is July (3mm).
Average rainfall days in May
Alter do Chão, Portugal
- Average rainfall days in May: 6.5 days
The month with the highest number of rainy days is April (11.7 days).
The month with the least rainy days is July (1.7 days).
Average snowfall in May
Alter do Chão, Portugal
- Average snowfall in May: 0mm
The month with the highest snowfall is February (5mm).
The months with the least snowfall are April, May, June, July, August, September, October, November and December (0mm).
Average snowfall days in May
Alter do Chão, Portugal
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is February (0.4 days).
The months with the least snowfall days are April, May, June, July, August, September, October, November and December (0 days).
Average daylight in May /
Average sunshine in May
Alter do Chão, Portugal
- Average daylight in May: 14h and 2min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in May: 10h and 1min
The months with the most sunshine are July and August (Average sunshine: 11h and 48min).
The month with the least sunshine is January (Average sunshine: 5h and 6min).
Average sunshine days in May
Alter do Chão, Portugal
- Average sunshine days in May: 22.9 days
The month with the most sunshine days is July (28.7 days).
The month with the least sunshine days is April (16.6 days).
Average UV index in May
Alter do Chão, Portugal
- Average UV index in May: 6
The month with the highest UV index is August (UV index 7).
The months with the lowest UV index are January, February, March, November and December (UV index 3).
Average cloud cover in May
Alter do Chão, Portugal
- Average cloud cover in May: 27
The month with the most cloud cover is January (Cloud cover 42).
The months with the least cloud cover are July and August (Cloud cover 8).
Average visibility in May
Alter do Chão, Portugal
- Average visibility in May: 9km
The months with the highest visibility are June, July, August and September (10km).
The month with the lowest visibility is January (8km).
