May Weather in Waterloo

Last updated: March 2, 2024

The weather in Waterloo, United States, during May is characterized by an average temperature of 14°C (58°F). Highs can soar to 31°C (88°F), while lows may dip to 2°C (36°F). Typically, the humidity level in Waterloo throughout May hovers around 82%.

2°C (36°F)

Minimum temperature

14°C (58°F)

Average temperature

31°C (88°F)

Maximum temperature

82%

Humidity

Precipitation and Sunshine hours

In May, Waterloo averages 116 mm (4.6 inches) of rainfall, typically over the course of 15 rainy days. The month enjoys an average of 14 hours 39 minutes of daylight, with the sun shining for approximately 9 hours 2 minutes each day. Additionally, there is a 41% probability of sunny days during this period.

116 mm (4.6 inches)

Precipitation

15 rainy days

Rainy days

9 hours 2 minutes

Sunshine hours

41%

Chance of sun

UV Index

In May, the UV Index in Waterloo reaches a maximum of 10, indicating a level of VeryHigh exposure. The most intense UV radiation typically occurs between 13:00 and 15:00, 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 9 10 9 7 5 3 2 1
Exposure Low Moderate High VeryHigh High Moderate Low
Time to burn 45 min 30 min 25 min 15 min 25 min 30 min 45 min

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