May Weather in Union, Paraguay

Last updated: August 31, 2025

In May, the average temperature in Union, Paraguay reaches a pleasant 20°C (69°F). However, be prepared for temperature fluctuations, as it can dip to a cool 6°C (42°F) or soar to a warm 35°C (95°F). This month also brings 120 mm (4.7 in) of precipitation over 11 days, with an average humidity level of 75%, creating a uniquely refreshing atmosphere.

May Temperature in Union

In May in Union, the average temperature is 20°C (69°F). Maximums can reach 35°C (95°F), while minimums can drop as low as 6°C (42°F). This makes it an ideal time for travelers to experience a pleasant climate with warm days and cool evenings.

May Weather in Union: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Union, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Union, May typically has an average temperature of 20°C (69°F), with highs reaching up to 35°C (95°F) and lows dropping to around 6°C (42°F).

Data source: Temperature data for Union generated using information from the Copernicus Climate Change Service.

May Precipitation in Union

In Union in May, the precipitation amount is 120 mm (4.7 in) during a span of 11 days.

May Precipitation Trends in Union

The chart displays monthly precipitation patterns in Union, with values for each month alongside May’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how May’s conditions compare to those of other months. In Union, May typically receives around 120 mm (4.7 inches) of precipitation spread over approximately 11 days.

Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

May Humidity in Union

In Union in May, humidity is 75%. With an average temperature of 20°C (69°F), this humidity feels like a warm, enveloping blanket, making travel a bit muggy and requiring frequent hydration breaks to stay comfortable while exploring.

May Average Humidity in Union

This chart illustrates the average monthly humidity levels in Union, with May’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In May, average humidity in Union is approximately 75%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Union

In Union in May, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in Union.

Maximum UV Index Levels in Union for May

The chart shows the monthly maximum UV Index (UVI) for Union in May, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In May, the maximum UV index in Union typically reaches 7, which falls under the high exposure category.

Data source: Union May UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

How May Weather in Union Compares to Other Months

Weather in Union varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Union, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Union, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	28°C (82°F)	142 mm (5.6 inches)	80%	extreme
February Weather	27°C (81°F)	102 mm (4.0 inches)	75%	extreme
March Weather	26°C (79°F)	102 mm (4.0 inches)	76%	extreme
April Weather	23°C (74°F)	137 mm (5.4 inches)	76%	extreme
May Weather	20°C (69°F)	120 mm (4.7 inches)	75%	high
June Weather	19°C (66°F)	88 mm (3.5 inches)	65%	high
July Weather	18°C (65°F)	36 mm (1.4 inches)	60%	high
August Weather	20°C (69°F)	66 mm (2.6 inches)	43%	very high
September Weather	24°C (75°F)	70 mm (2.8 inches)	47%	very high
October Weather	25°C (77°F)	194 mm (7.6 inches)	52%	extreme
November Weather	26°C (79°F)	136 mm (5.4 inches)	71%	extreme
December Weather	27°C (81°F)	150 mm (5.9 inches)	84%	extreme