May Weather in Hyannis

Last updated: March 2, 2024

The weather in Hyannis, United States, during May is characterized by an average temperature of 13°C (55°F). Highs can soar to 30°C (86°F), while lows may dip to -2°C (29°F). Typically, the humidity level in Hyannis throughout May hovers around 76%.

-2°C (29°F)

Minimum temperature

13°C (55°F)

Average temperature

30°C (86°F)

Maximum temperature

76%

Humidity

Precipitation and Sunshine hours

In May, Hyannis averages 136 mm (5.4 inches) of rainfall, typically over the course of 14 rainy days. The month enjoys an average of 14 hours 34 minutes of daylight, with the sun shining for approximately 9 hours 32 minutes each day. Additionally, there is a 40% probability of sunny days during this period.

136 mm (5.4 inches)

Precipitation

14 rainy days

Rainy days

9 hours 32 minutes

Sunshine hours

40%

Chance of sun

UV Index

In May, the UV Index in Hyannis 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 9 10 10 9 7 5 3 1 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

Compare Hyannis's Climate with Cities Worldwide