May Weather in St. Marys

Last updated: March 2, 2024

The weather in St. Marys, United States, during May is characterized by an average temperature of 24°C (75°F). Highs can soar to 32°C (90°F), while lows may dip to 15°C (59°F). Typically, the humidity level in St. Marys throughout May hovers around 72%.

15°C (59°F)

Minimum temperature

24°C (75°F)

Average temperature

32°C (90°F)

Maximum temperature

72%

Humidity

Precipitation and Sunshine hours

In May, St. Marys averages 80 mm (3.2 inches) of rainfall, typically over the course of 10 rainy days. The month enjoys an average of 13 hours 42 minutes of daylight, with the sun shining for approximately 10 hours 42 minutes each day. Additionally, there is a 50% probability of sunny days during this period.

80 mm (3.2 inches)

Precipitation

10 rainy days

Rainy days

10 hours 42 minutes

Sunshine hours

50%

Chance of sun

UV Index

In May, the UV Index in St. Marys reaches a maximum of 11, indicating a level of Extreme exposure. The most intense UV radiation typically occurs between 13:00 and 15:00, during which unprotected skin may burn in as little as 10 minutes.

Average solar exposure data for the current time of the year. Actual values may vary and depend on many factors, such as cloud cover, vegetation cover, surface type, etc.
	07:00	08:00	09:00	10:00	11:00	12:00	13:00	14:00	15:00	16:00	17:00	18:00	19:00
UVI	1	1	3	5	8	10	11	11	9	6	4	2	1
Exposure	Low		Moderate		VeryHigh		Extreme		VeryHigh	High	Moderate	Low
Time to burn	45 min		30 min		15 min		10 min		15 min	25 min	30 min	45 min