April Weather in Half Moon Bay

Last updated: March 2, 2024

The weather in Half Moon Bay, United States, during April is characterized by an average temperature of 12°C (55°F). Highs can soar to 20°C (69°F), while lows may dip to 8°C (47°F). Typically, the humidity level in Half Moon Bay throughout April hovers around 79%.

8°C (47°F)

Minimum temperature

12°C (55°F)

Average temperature

20°C (69°F)

Maximum temperature

79%

Humidity

Precipitation and Sunshine hours

In April, Half Moon Bay averages 34 mm (1.3 inches) of rainfall, typically over the course of 5 rainy days. The month enjoys an average of 13 hours 11 minutes of daylight, with the sun shining for approximately 9 hours 52 minutes each day. Additionally, there is a 44% probability of sunny days during this period.

34 mm (1.3 inches)

Precipitation

5 rainy days

Rainy days

9 hours 52 minutes

Sunshine hours

44%

Chance of sun

UV Index

In April, the UV Index in Half Moon Bay reaches a maximum of 9, 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 1 3 5 7 8 9 8 7 4 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 Half Moon Bay's Climate with Cities Worldwide