May Weather in Rio Vista, United States

Last updated: June 24, 2025

In May, the average temperature in Rio Vista, United States is a comfortable 19°C (67°F). However, temperatures can range from a chilly 6°C (43°F) to a sweltering 39°C (102°F). With an average humidity of 74%, you'll want to stay hydrated, especially when considering the 16 mm (0.6 in) of precipitation expected over 2 days.

May Temperature in Rio Vista

In May in Rio Vista, the average temperature is 19°C (67°F). Maximum temperatures can reach 39°C (102°F), while minimums can drop as low as 6°C (43°F). Be prepared for a wide range of temperatures during your visit, so pack accordingly!

May Weather in Rio Vista: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Rio Vista, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Rio Vista, May typically has an average temperature of 19°C (67°F), with highs reaching up to 39°C (102°F) and lows dropping to around 6°C (43°F).

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

May Precipitation in Rio Vista

In Rio Vista in May, the precipitation amount is 16 mm (0.6 in) over a period of 2 days.

May Precipitation Trends in Rio Vista

The chart displays monthly precipitation patterns in Rio Vista, 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 Rio Vista, May typically receives around 16 mm (0.6 inches) of precipitation spread over approximately 2 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 Rio Vista

In Rio Vista in May, humidity is 74%. With an average temperature of 19°C (67°F), this humidity feels like a warm, enveloping blanket that can make outdoor activities feel stifling, often leading travelers to seek shade and hydrate frequently.

May Average Humidity in Rio Vista

This chart illustrates the average monthly humidity levels in Rio Vista, 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 Rio Vista is approximately 74%, 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 Rio Vista

In Rio Vista in May, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Rio Vista.

Maximum UV Index Levels in Rio Vista for May

The chart shows the monthly maximum UV Index (UVI) for Rio Vista 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 Rio Vista typically reaches 10, which falls under the very high exposure category.

Data source: Rio Vista 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 Rio Vista Compares to Other Months

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

This table compares monthly weather conditions in Rio Vista, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	10°C (50°F)	116 mm (4.6 inches)	84%	moderate
February Weather	12°C (53°F)	99 mm (3.9 inches)	84%	moderate
March Weather	13°C (56°F)	76 mm (3.0 inches)	83%	high
April Weather	17°C (62°F)	33 mm (1.3 inches)	81%	very high
May Weather	19°C (67°F)	16 mm (0.6 inches)	74%	very high
June Weather	23°C (73°F)	2 mm (0.1 inches)	64%	extreme
July Weather	23°C (74°F)	0 mm (0.0 inches)	44%	extreme
August Weather	23°C (73°F)	0 mm (0.0 inches)	36%	very high
September Weather	22°C (72°F)	1 mm (0.0 inches)	44%	very high
October Weather	19°C (66°F)	31 mm (1.2 inches)	65%	high
November Weather	13°C (56°F)	40 mm (1.6 inches)	84%	moderate
December Weather	10°C (50°F)	90 mm (3.5 inches)	83%	moderate