August weather forecast and climate
Half Moon Bay, CA

A warm and sunny day on a scenic beach in Half Moon Bay, California
A warm and sunny day on a scenic beach in Half Moon Bay, California

Weather in August

The last month of the summer, August, is another comfortable month in Half Moon Bay, California, with temperature in the range of an average high of 65.8°F (18.8°C) and an average low of 55.9°F (13.3°C).

Temperature

In Half Moon Bay, the average high-temperature in August is practically the same as in July - a still comfortable 65.8°F (18.8°C). The average low-temperature, in Half Moon Bay, is 55.9°F (13.3°C).

Humidity

August is the most humid month in Half Moon Bay, with an average relative humidity of 82%.

Rainfall

In Half Moon Bay, California, during 5.3 rainfall days, 0.16" (4mm) of precipitation is typically accumulated. Throughout the year, in Half Moon Bay, there are 76.8 rainfall days, and 8.54" (217mm) of precipitation is accumulated.

Daylight

The average length of the day in Half Moon Bay is 13.6h.

Sunshine

In August, the average sunshine in Half Moon Bay is 11.2h.

UV index

June, August and September, with an average maximum UV index of 5, are months with the highest UV index in Half Moon Bay. A UV Index of 3 to 5 symbolizes a medium health hazard from the exposure to the Sun's UV rays for average individuals.
Note: The average daily UV index of 5 transform into the following instructions:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
[Resources]

FAQ

What is the temperature in August in Half Moon Bay?

In August, the average high-temperature is 65.8°F (18.8°C), and the average low-temperature is 55.9°F (13.3°C).

What is the most humid month in Half Moon Bay?

August is the most humid month in Half Moon Bay, with an average relative humidity of 82%.

What is the average humidity in August in Half Moon Bay?

In Half Moon Bay, California, the average relative humidity in August is 82%.

How many days does it rain in August in Half Moon Bay?

In Half Moon Bay, in August, during 5.3 rainfall days, 0.16" (4mm) of precipitation is typically accumulated.

What is the average length of the day in August in Half Moon Bay?

In August, the average length of the day in Half Moon Bay is 13.6h.

How long on average sun shines in August in Half Moon Bay?

The average sunshine in August in Half Moon Bay is 11.2h.

What is the month with the highest UV index in Half Moon Bay?

June, August and September, with an average maximum UV index of 5, are months with the highest UV index.

What is the UV index intensity in August in Half Moon Bay?

In Half Moon Bay, California, the average daily maximum UV index in August is 5. A UV Index estimate of 3 to 5 represents a moderate health threat from unsafe exposure to the Sun's UV rays.

Average temperature in August
Half Moon Bay, CA

Average temperature in August - Half Moon Bay, CA
  • Average high temperature in August: 65.8°F

The warmest month (with the highest average high temperature) is September (66.9°F).
The month with the lowest average high temperature is December (55.6°F).

  • Average low temperature in August: 55.9°F

The month with the highest average low temperature is September (56.7°F).
The coldest month (with the lowest average low temperature) is February (48.7°F).

[Resources]

Average pressure in August
Half Moon Bay, CA

Average pressure in August - Half Moon Bay, CA
  • Average pressure in August: 29.93"

The month with the highest atmospheric pressure is January (30.13").
The month with the lowest atmospheric pressure is September (29.92").

[Resources]

Average wind speed in August
Half Moon Bay, CA

Average wind speed in August - Half Moon Bay, CA
  • Average wind speed in August: 6.6mph

The windiest month (with the highest average wind speed) is April (9.6mph).
The calmest month (with the lowest average wind speed) is August (6.6mph).

[Resources]

Average humidity in August
Half Moon Bay, CA

Average humidity in August - Half Moon Bay, CA
  • Average humidity in August: 82%

The month with the highest relative humidity is August (82%).
Months with the lowest relative humidity are November and December (72%).

[Resources]

Average rainfall in August
Half Moon Bay, CA

Average rainfall in August - Half Moon Bay, CA
  • Average rainfall in August: 0.16"

The wettest month (with the highest rainfall) is February (1.61").
The driest months (with the least rainfall) are June and July (0.12").

[Resources]

Average rainfall days in August
Half Moon Bay, CA

Average rainfall days in August - Half Moon Bay, CA
  • Average rainfall days in August: 5.3 days

The month with the highest number of rainy days is March (10.8 days).
The month with the least rainy days is June (3 days).

[Resources]

Average daylight in August /
Average sunshine in August
Half Moon Bay, CA

Average daylight in August / Average sunshine in August - Half Moon Bay, CA
  • Average daylight in August: 13.6h

The month with the longest days is June (Average daylight: 14.7h).
The month with the shortest days is December (Average daylight: 9.6h).

  • Average sunshine in August: 11.2h

The month with the most sunshine is July (Average sunshine: 11.4h).
The month with the least sunshine is December (Average sunshine: 5.7h).

[Resources]

Average sunshine days in August
Half Moon Bay, CA

Average sunshine days in August - Half Moon Bay, CA
  • Average sunshine days in August: 18.8 days

The month with the most sunshine days is October (24.6 days).
Months with the least sunshine days are March and August (18.8 days).

[Resources]

Average UV index in August
Half Moon Bay, CA

Average UV index in August - Half Moon Bay, CA
  • Average UV index in August: 5

Months with the highest UV index are June, August and September (UV index 5).
Months with the lowest UV index are January, February, March, April, May, July, October, November and December (UV index 4).

[Resources]

Average cloud cover in August
Half Moon Bay, CA

Average cloud cover in August - Half Moon Bay, CA
  • Average cloud cover in August: 23

The month with the most cloud cover is March (Cloud cover 38).
The month with the least cloud cover is September (Cloud cover 18).

[Resources]

Average visibility in August
Half Moon Bay, CA

Average visibility in August - Half Moon Bay, CA
  • Average visibility in August: 6mi

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

[Resources]