May Weather in Upper Alton

Last updated: March 2, 2024

The weather in Upper Alton, United States, during May is characterized by an average temperature of 19°C (67°F). Highs can soar to 32°C (90°F), while lows may dip to 6°C (44°F). Typically, the humidity level in Upper Alton throughout May hovers around 82%.

6°C (44°F)

Minimum temperature

19°C (67°F)

Average temperature

32°C (90°F)

Maximum temperature

82%

Humidity

Precipitation and Sunshine hours

In May, Upper Alton averages 150 mm (5.9 inches) of rainfall, typically over the course of 13 rainy days. The month enjoys an average of 14 hours 19 minutes of daylight, with the sun shining for approximately 9 hours 22 minutes each day. Additionally, there is a 26% probability of sunny days during this period.

150 mm (5.9 inches)

Precipitation

13 rainy days

Rainy days

9 hours 22 minutes

Sunshine hours

26%

Chance of sun

UV Index

In May, the UV Index in Upper Alton reaches a maximum of 10, indicating a level of VeryHigh exposure. The most intense UV radiation typically occurs between 12:00 and 14:00, during which unprotected skin may burn in as little as 15 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	2	4	6	8	10	10	9	8	5	3	2	1
Exposure	Low		Moderate	High	VeryHigh					Moderate		Low
Time to burn	45 min		30 min	25 min	15 min					30 min		45 min