May weather - Autumn 2024 - Montevideo, Uruguay

Weather in May
Frequently asked questions
Average temperature in May
Average humidity in May
Average rainfall in May
Average rainfall days in May
Average sea temperature in May
Average daylight in May
Average sunshine in May
Average UV index in May

Beautiful lawns and palm trees in the independence square outside the Centrally placed Salvo Palace in Montevideo, Uruguay

Weather in May

May ushers in the colder period of Montevideo's climatic pattern, with signs of winter becoming clearer. Decreased daylight hours coupled with increased rainfall creates an ambiance of winter approaching. The sea temperature dips further down to 15.9°C (60.6°F), making it the coolest thus far in the year. Residents tend to spend more time indoors due to the shorter sunshine hours and falling temperatures. Transitioning to winter, May exhibits a peak in humidity levels at 78%.

Temperature

Transition into May in Montevideo, Uruguay, subtly marks a drop in the average high-temperature, moderately moving from a pleasant 22°C (71.6°F) in April to a refreshing 18.6°C (65.5°F). Montevideo reports an average nighttime low-temperature of 10.2°C (50.4°F) in May.

Humidity

In May, the average relative humidity is 78%.

Rainfall

In Montevideo, Uruguay, during May, the rain falls for 6 days and regularly aggregates up to 89mm (3.5") of precipitation. In Montevideo, during the entire year, the rain falls for 77 days and collects up to 1101mm (43.35") of precipitation.

Sea temperature

In Montevideo, Uruguay, the average seawater temperature in May is 15.9°C (60.6°F).
Note: For most people, a water temperature of 15.9°C (60.6°F) is not conducive to enjoyable swimming. Breathing control becomes harder as the water temperature dips below 21°C (69.8°F).

Daylight

In May, the average length of the day is 10h and 18min.
On the first day of May, sunrise is at 07:21 and sunset at 18:01. On the last day of the month, sunrise is at 07:43 and sunset at 17:41 -03.

Sunshine

The average sunshine in May is 5.3h.

UV index

In May, the average daily maximum UV index is 3. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for average individuals.
Note: In May, the maximum UV index of 3 suggests this advice:
Guard yourself - Precautionary measures against sun damage are advocated. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly.

Updated: Jun 4, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are the temperatures in May?

May temperatures vary between a high-temperature of 18.6°C (65.5°F) and a low-temperature of 10.2°C (50.4°F). The average heat index (a.k.a. 'felt air temperature', 'feels like'), which factors the actual air temperature with the relative humidity, in February is calculated to be 30°C (86°F).

What is the average humidity in May?

In May, the average relative humidity is 78%.

How much does it rain in May?

In May, the rain falls for 6 days. Throughout May, 89mm (3.5") of precipitation is accumulated.

What is the sea water temperature in May?

In Montevideo, the average seawater temperature in May is 15.9°C (60.6°F). For swimming, a surface water temperature of 15.9°C (60.6°F) is not enjoyable for the majority. It is not considered safe, as controlling breathing becomes progressively more difficult as water temperature decreases below 21°C (69.8°F).

What is the average length of the day in May?

In May, the average day length is 10h and 18min.

When is the sunrise / sunset in May?

In May, on the first day of the month, sunrise is at 07:21 and sunset at 18:01. On the last day of the month, sunrise is at 07:43 and sunset at 17:41 -03.

How many hours of sunshine does Montevideo have in May?

In Montevideo, the average sunshine duration in May is 5.3h.

How high is the UV index in May?

In May, the average daily maximum UV index is 3. A UV Index reading of 3 to 5 represents a medium hazard to health 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

22°C 71.6°F

18.6°C 65.5°F

15.1°C 59.2°F

Average low temperature

Average humidity

Average rainfall

Average rainfall days

Average sea temperature

Average daylight

Average sunshine

Average UV index

Average temperature in May
Montevideo, Uruguay

Average high temperature in May: 18.6°C

The warmest month (with the highest average high temperature) is January (28.4°C).
The month with the lowest average high temperature is July (15°C).

Average low temperature in May: 10.2°C

The month with the highest average low temperature is January (18°C).
The coldest month (with the lowest average low temperature) is July (7.2°C).

Average humidity in May
Montevideo, Uruguay

Average humidity in May: 78%

The month with the highest relative humidity is June (82%).
The month with the lowest relative humidity is December (67%).

Average rainfall in May
Montevideo, Uruguay

Average rainfall in May: 89mm

The wettest month (with the highest rainfall) is October (108.5mm).
The driest month (with the least rainfall) is June (83.1mm).

Average rainfall days in May
Montevideo, Uruguay

Average rainfall days in May: 6 days

The months with the highest number of rainy days are February, June, July, October and November (7 days).
The months with the least rainy days are January, March, April, May, August, September and December (6 days).

Average sea temperature in May
Montevideo, Uruguay

Average sea temperature in May: 15.9°C

The best month for swimming (with the highest average sea temperature) is January (24.2°C).
The coldest month (with the lowest average sea temperature) is July (11.3°C).

Average daylight in May /
Average sunshine in May
Montevideo, Uruguay

Average daylight in May: 10h and 2min

The month with the longest days is December (Average daylight: 14h and 30min).
The month with the shortest days is June (Average daylight: 9h and 48min).

Average sunshine in May: 5h and 2min

The month with the most sunshine is January (Average sunshine: 9h and 30min).
The month with the least sunshine is June (Average sunshine: 4h and 18min).

Average UV index in May
Montevideo, Uruguay

Average UV index in May: 3

The months with the highest UV index are January and December (UV index 12).
The months with the lowest UV index are June and July (UV index 2).

May weather forecast
Montevideo, Uruguay

Contents