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May Weather in Rosario, Uruguay

Last updated: August 28, 2025

In May, the average temperature in Rosario, Uruguay hovers around a pleasant 14°C (58°F). Expect cool minimums of 3°C (38°F) and comfortably warm maximums reaching 27°C (82°F). However, be prepared for a bit of rain, as you'll encounter an average precipitation of 89 mm (3.5 in) over 7 days. Don't forget, the average humidity sits at a relatively high 82%, creating a lush and vibrant atmosphere throughout the month.

May Temperature in Rosario

In May in Rosario, the average temperature is 14°C (58°F), with maximums reaching 27°C (82°F) and minimums dropping as low as 3°C (38°F). This makes it a perfect time for travelers to enjoy a mild climate while exploring the area's outdoor attractions.

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

The chart illustrates May temperature patterns in Rosario, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Rosario, May typically has an average temperature of 14°C (58°F), with highs reaching up to 27°C (82°F) and lows dropping to around 3°C (38°F).
JanFebMarAprMayJunJulAugSepOctNovDec767370655754525458626873
Data source: Temperature data for Rosario generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

May Precipitation in Rosario

In Rosario in May, the total precipitation amount is 89 mm (3.5 in) spread over a period of 7 days.

May Precipitation Trends in Rosario

The chart displays monthly precipitation patterns in Rosario, 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 Rosario, May typically receives around 89 mm (3.5 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec8511095719075867576916772
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Rosario

In Rosario in May, humidity is 82%. With an average temperature of 14°C (58°F), this humidity feels like a heavy blanket wrapping around you, making travel uncomfortable and sticky.

May Average Humidity in Rosario

This chart illustrates the average monthly humidity levels in Rosario, 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 Rosario is approximately 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec63%69%73%79%83%80%72%72%76%71%68%65%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Rosario

In Rosario in May, the maximum UV index reaches 5, which corresponds to a moderate Exposure Category. Under these conditions, the estimated time to burn is approximately 30 minutes. For more details, you can check the Hourly UV Index in Rosario.

Maximum UV Index Levels in Rosario for May

The chart shows the monthly maximum UV Index (UVI) for Rosario 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 Rosario typically reaches 5, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec141311754468101314
Data source: Rosario 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 Rosario Compares to Other Months

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

This table compares monthly weather conditions in Rosario, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather24°C (76°F)85 mm (3.4 inches)63%extreme
February Weather23°C (73°F)110 mm (4.3 inches)69%extreme
March Weather21°C (70°F)95 mm (3.7 inches)73%extreme
April Weather18°C (65°F)70 mm (2.8 inches)79%high
May Weather14°C (58°F)89 mm (3.5 inches)82%moderate
June Weather12°C (54°F)75 mm (3.0 inches)80%moderate
July Weather11°C (52°F)86 mm (3.4 inches)72%moderate
August Weather12°C (54°F)75 mm (3.0 inches)72%high
September Weather14°C (58°F)76 mm (3.0 inches)76%very high
October Weather17°C (62°F)91 mm (3.6 inches)71%very high
November Weather20°C (69°F)67 mm (2.6 inches)68%extreme
December Weather23°C (73°F)72 mm (2.8 inches)65%extreme

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