August weather forecast
Alameda, CA

Weather in August

The last month of the summer, August, is also a moderately hot month in Alameda, California, with an average temperature varying between 75.6°F (24.2°C) and 56.1°F (13.4°C).

Temperature

In Alameda, the average high-temperature in August is practically the same as in July - a still moderately hot 75.6°F (24.2°C). In Alameda, California, the average low-temperature is 56.1°F (13.4°C).

Humidity

In Alameda, the average relative humidity in August is 70%.

Rainfall

In August, the rain falls for 1.3 days. Throughout August, 0.08" (2mm) of precipitation is accumulated. In Alameda, during the entire year, the rain falls for 67.2 days and collects up to 6.1" (155mm) of precipitation.

Ocean temperature

In Alameda, California, the average seawater temperature in August is 56.7°F (13.7°C).
Note: Swimming in 56.7°F (13.7°C) is considered life-threatening. Even a few minutes in 55.4°F (13°C) water is uncomfortable, and swimming below 50°F (10°C) may cause total loss of breathing control and cold shock, depending on a person's physique.

Daylight

The average length of the day in August in Alameda is 13h and 34min.
On the first day of August in Alameda, sunrise is at 6:12 am and sunset at 8:17 pm. On the last day of the month, sunrise is at 6:38 am and sunset at 7:39 pm PDT.

Sunshine

In August, the average sunshine is 11.9h.

UV index

The months with the highest UV index in Alameda are April through September, with an average maximum UV index of 5. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for the average person.
Note: The average daily UV index of 5 in August transform into the following instructions:
Take precautions - Protection against skin and eye damage is obliged. 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 average humidity in August in Alameda?

In Alameda, California, the average relative humidity in August is 70%.

How many days does it rain in August in Alameda?

In August, in Alameda, the rain falls for 1.3 days. Throughout August, 0.08" (2mm) of precipitation is accumulated.

How cold is the water in August in Alameda?

In August, the average ocean temperature in Alameda, California, is 56.7°F (13.7°C). At temperatures below 50°F (10°C), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Even a short swim, without thermal protection, at temperatures around 55.4°F (13°C) is not comfortable.

How many hours of daylight does Alameda have in August?

In August, the average day length in Alameda is 13h and 34min.

When are sunrise and sunset in August in Alameda?

On the first day of August in Alameda, sunrise is at 6:12 am and sunset at 8:17 pm. On the last day of the month, sunrise is at 6:38 am and sunset at 7:39 pm PDT.

How long on average sun shines in August in Alameda?

In Alameda, the average sunshine duration in August is 11.9h.

What is the month with the highest UV index in Alameda?

The months with the highest UV index in Alameda, California, are April through September, with an average maximum UV index of 5.

What is the UV index reading in August in Alameda?

In Alameda, the average daily maximum UV index in August is 5. A UV Index of 3 to 5 symbolizes a moderate vulnerability from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in August
Alameda, CA

Average temperature in August - Alameda, CA
  • Average high temperature in August: 75.6°F

The warmest month (with the highest average high temperature) is September (75.9°F).
The month with the lowest average high temperature is December (55.9°F).

  • Average low temperature in August: 56.1°F

The month with the highest average low temperature is September (56.5°F).
The coldest month (with the lowest average low temperature) is January (45°F).

[Resources]

Average pressure in August
Alameda, CA

Average pressure in August - Alameda, CA
  • Average pressure in August: 29.92"Hg

The month with the highest atmospheric pressure is January (30.13"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.92"Hg).

[Resources]

Average wind speed in August
Alameda, CA

Average wind speed in August - Alameda, CA
  • Average wind speed in August: 5.8mph

The windiest month (with the highest average wind speed) is May (7.2mph).
The calmest months (with the lowest average wind speed) are October and November (5.2mph).

[Resources]

Average humidity in August
Alameda, CA

Average humidity in August - Alameda, CA
  • Average humidity in August: 70%

The month with the highest relative humidity is March (75%).
The month with the lowest relative humidity is October (65%).

[Resources]

Average rainfall in August
Alameda, CA

Average rainfall in August - Alameda, CA
  • Average rainfall in August: 0.08"

The wettest month (with the highest rainfall) is February (1.18").
The driest month (with the least rainfall) is July (0.04").

[Resources]

Average rainfall days in August
Alameda, CA

Average rainfall days in August - Alameda, CA
  • Average rainfall days in August: 1.3 days

The month with the highest number of rainy days is March (11.4 days).
The month with the least rainy days is August (1.3 days).

[Resources]

Average sea temperature in August
Alameda, CA

Average sea temperature in August - Alameda, CA
  • Average sea temperature in August: 56.7°F

The best month for swimming (with the highest average sea temperature) is September (57.3°F).
The coldest months (with the lowest average sea temperature) are April and June (53°F).

[Resources]

Average daylight in August /
Average sunshine in August
Alameda, CA

Average daylight in August / Average sunshine in August - Alameda, CA
  • Average daylight in August: 13h and 34min

The month with the longest days is June (Average daylight: 14h and 44min).
The month with the shortest days is December (Average daylight: 9h and 36min).

  • Average sunshine in August: 11h and 54min

The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 54min).

[Resources]

Average sunshine days in August
Alameda, CA

Average sunshine days in August - Alameda, CA
  • Average sunshine days in August: 23.8 days

The month with the most sunshine days is July (25.4 days).
The month with the least sunshine days is March (17.3 days).

[Resources]

Average UV index in August
Alameda, CA

Average UV index in August - Alameda, CA
  • Average UV index in August: 5

The months with the highest UV index are April, May, June, July, August and September (UV index 5).
The months with the lowest UV index are January, November and December (UV index 3).

[Resources]

Average cloud cover in August
Alameda, CA

Average cloud cover in August - Alameda, CA
  • Average cloud cover in August: 11

The month with the most cloud cover is March (Cloud cover 35).
The month with the least cloud cover is July (Cloud cover 9).

[Resources]

Average visibility in August
Alameda, CA

Average visibility in August - Alameda, CA
  • Average visibility in August: 6mi

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

[Resources]

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location
* you will be automatically redirected to the weather forecast for your location