May weather forecastViamão, Brazil

May

Weather in May

May, the last month of the autumn in Viamão, is also an agreeable month, with an average temperature ranging between max 21.8°C (71.2°F) and min 13.9°C (57°F).

Temperature

Transition into May subtly marks a drop in the average high-temperature, moderately moving from a moderately hot 25.3°C (77.5°F) in April to an agreeable 21.8°C (71.2°F). Viamão experiences an average temperature drop to a moderate 13.9°C (57°F) during May nights.

Humidity

May through July and September, with an average relative humidity of 80%, are the most humid months in Viamão.

Rainfall

In May, the rain falls for 12.2 days. Throughout May, 82mm (3.23") of precipitation is accumulated. Throughout the year, in Viamão, there are 163.2 rainfall days, and 918mm (36.14") of precipitation is accumulated.

Daylight

In Viamão, the average length of the day in May is 10h and 37min.
On the first day of the month, sunrise is at 06:53 and sunset at 17:48. On the last day of May, in Viamão, Brazil, sunrise is at 07:11 and sunset at 17:31 -03.

Sunshine

In Viamão, the average sunshine in May is 7.3h.

UV index

May and June, with an average maximum UV index of 4, are months with the lowest UV index. A UV Index estimate of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for the average person.
Note: The maximum daily UV index, 4 in May, converts into the following recommendations:
Be vigilant - A duty to shield skin and eyes from injury exists. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage.

Updated: Feb 2, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

In Viamão, 21.8°C (71.2°F) is the average high-temperature and 13.9°C (57°F) is the average low-temperature during May. In March, the average heat index (a.k.a. 'real feel', 'feels like'), which takes the relative humidity and factors it into the air temperature reading, is appraised at 30°C (86°F).

May through July and September, with an average relative humidity of 80%, are most humid months in Viamão.

In May, the average relative humidity in Viamão, Brazil, is 80%.

In Viamão, in May, during 12.2 rainfall days, 82mm (3.23") of precipitation is typically accumulated.

In Viamão, the average day length in May is 10h and 37min.

In May, on the first day of the month, sunrise is at 06:53 and sunset at 17:48. On the last day of the month, in Viamão, Brazil, sunrise is at 07:11 and sunset at 17:31 -03.

The average sunshine duration in May in Viamão, Brazil, is 7.3h.

The months with the lowest UV index in Viamão are May and June, with an average maximum UV index of 4.

In Viamão, the average daily maximum UV index in May is 4. A UV Index estimate of 3 to 5 represents a moderate vulnerability from exposure to the Sun's UV radiation.

Today

Tomorrow

Long-term

Year J F M A May J J A S O N D

Apr

May

Jun

Average high temperature

25.3°C

21.8°C

19.2°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

12.4km/h

11.8km/h

12km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average daylight

Average sunshine

Average sunshine days

16.6

17.4

17.7

Average UV index

Average cloud cover

Average visibility

Average temperature in May
Viamão, Brazil

Average high temperature in May: 21.8°C

The warmest month (with the highest average high temperature) is February (30.3°C).
The month with the lowest average high temperature is July (18.6°C).

Average low temperature in May: 13.9°C

The month with the highest average low temperature is February (20.5°C).
The coldest month (with the lowest average low temperature) is July (11.1°C).

Average pressure in May
Viamão, Brazil

Average pressure in May: 1017.7mbar

The month with the highest atmospheric pressure is July (1019.8mbar).
The month with the lowest atmospheric pressure is December (1011.4mbar).

Average wind speed in May
Viamão, Brazil

Average wind speed in May: 11.1km/h

The windiest month (with the highest average wind speed) is October (13.3km/h).
The calmest month (with the lowest average wind speed) is May (11.1km/h).

Average humidity in May
Viamão, Brazil

Average humidity in May: 80%

The months with the highest relative humidity are May, June, July and September (80%).
The month with the lowest relative humidity is December (72%).

Average rainfall in May
Viamão, Brazil

Average rainfall in May: 82mm

The wettest month (with the highest rainfall) is July (103mm).
The driest month (with the least rainfall) is April (54mm).

Average rainfall days in May
Viamão, Brazil

Average rainfall days in May: 12.2 days

The month with the highest number of rainy days is January (17.3 days).
The month with the least rainy days is June (11.1 days).

Average daylight in May /
Average sunshine in May
Viamão, Brazil

Average daylight in May: 10h and 36min

The month with the longest days is December (Average daylight: 14h and 0min).
The month with the shortest days is June (Average daylight: 10h and 12min).

Average sunshine in May: 7h and 18min

The months with the most sunshine are January, November and December (Average sunshine: 8h and 18min).
The month with the least sunshine is September (Average sunshine: 7h and 6min).

Average sunshine days in May
Viamão, Brazil

Average sunshine days in May: 17.4 days

The month with the most sunshine days is July (18.1 days).
The month with the least sunshine days is February (11.2 days).

Average UV index in May
Viamão, Brazil

Average UV index in May: 4

The months with the highest UV index are January, February, March, November and December (UV index 6).
The months with the lowest UV index are May and June (UV index 4).

Average cloud cover in May
Viamão, Brazil

Average cloud cover in May: 38

The month with the most cloud cover is September (Cloud cover 40).
The month with the least cloud cover is November (Cloud cover 31).

Average visibility in May
Viamão, Brazil

Average visibility in May: 9km

The month with the highest visibility is February (10km).
The months with the lowest visibility are January, March, April, May, June, July, August, September, October, November and December (9km).