August weather forecast
Healdsburg, CA

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Neat rows of plants in a farm with a view of a red farmhouse up the hill in Healdsburg, California
Neat rows of plants in a farm with a view of a red farmhouse up the hill in Healdsburg, California

Weather in August

The last month of the summer, August, is also a moderately hot month in Healdsburg, California, with an average temperature ranging between max 84.6°F (29.2°C) and min 55°F (12.8°C).

Temperature

Stepping into August, Healdsburg records an average high-temperature of a still warm 84.6°F (29.2°C), almost consistent with July. Healdsburg notes a substantial temperature decline from the daytime peaks throughout August, with an average nighttime temperature of 55°F (12.8°C).

Heat index

The heat index for August is appraised at a hot 87.8°F (31°C). Extended exposure and activity might lead to tiredness, potentially resulting in heat cramps.
Understand that the heat index values take into account shaded locations and mild winds. The presence of direct sunlight can raise the heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', embodies the combination of air temperature and moisture content to illustrate perceived heat. Physical activity, clothing, and metabolic variations are additional factors that impact an individual's perception of temperature. It is important to note that direct sunlight can intensify the weather impact, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for babies and toddlers. Children often fail to recognize the requirement to rest and rehydrate. Thirst, being a late symptom of dehydration, underlines the importance of maintaining hydration, especially during ongoing physical activities.

Humidity

The average relative humidity in August in Healdsburg is 60%.

Rainfall

The months with the least rainfall in Healdsburg are July and August Rain falls for 0.8 days and accumulates 0.04" (1mm) of rain.

Snowfall

January, March through December are months without snowfall.

Daylight

In August, the average length of the day is 13h and 37min.
On the first day of the month, sunrise is at 6:13 am and sunset at 8:21 pm. On the last day of August, sunrise is at 6:40 am and sunset at 7:42 pm PDT.

Sunshine

The average sunshine in August in Healdsburg is 11.9h.

UV index

The months with the highest UV index are June through August, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high threat to health from unsafe exposure to UV radiation for the average person.
Note: In August, the UV index of 6 transforms into the following advice:
Stand by precautions and apply sun safety measures. Evading sunburn is of great importance. Limit your direct sun exposure, especially between 10 a.m. and 4 p.m., when UV radiation is strongest. Shade structures might not provide complete sun protection. Boost your sun resistance with garments that are densely woven yet spacious.
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Frequently asked questions

How hot is August in Healdsburg?

During August, Healdsburg experiences an average high-temperature of 84.6°F (29.2°C) and a low-temperature of 55°F (12.8°C). In August, the average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which factors the actual air temperature with the relative humidity, is appraised at 87.8°F (31°C).

What is the average humidity in August in Healdsburg?

In August, the average relative humidity in Healdsburg is 60%.

What is the driest month in Healdsburg?

July and August are months with the least rain when the rain falls for 0.8 days and typically aggregates up to 0.04" (1mm) of rain.

How many days does it rain in August in Healdsburg?

In Healdsburg, in August, it is raining for 0.8 days, with typically 0.04" (1mm) of accumulated precipitation.

When it does not snow in Healdsburg?

In Healdsburg, California, snow does not fall in January, March through December.

How many hours of daylight does Healdsburg have in August?

In Healdsburg, the average day length in August is 13h and 37min.

What time are sunrise and sunset in August in Healdsburg?

In August, on the first day of the month, sunrise is at 6:13 am and sunset at 8:21 pm. On the last day of the month, in Healdsburg, California, sunrise is at 6:40 am and sunset at 7:42 pm PDT.

How many hours of sunshine does Healdsburg have in August?

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

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

The months with the highest UV index in Healdsburg are June through August, with an average maximum UV index of 6.

What is the UV index reading in August in Healdsburg?

The average daily maximum UV index in August is 6. A UV Index estimate of 6 to 7 represents a high health threat from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in August
Healdsburg, CA

Average temperature in August - Healdsburg, CA
  • Average high temperature in August: 84.6°F

The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is December (55°F).

  • Average low temperature in August: 55°F

The month with the highest average low temperature is August (55°F).
The coldest month (with the lowest average low temperature) is December (40.1°F).

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Average pressure in August
Healdsburg, CA

Average pressure in August - Healdsburg, 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).

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Average wind speed in August
Healdsburg, CA

Average wind speed in August - Healdsburg, CA
  • Average wind speed in August: 4.6mph

The windiest months (with the highest average wind speed) are April and May (6.2mph).
The calmest month (with the lowest average wind speed) is November (4.5mph).

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Average humidity in August
Healdsburg, CA

Average humidity in August - Healdsburg, CA
  • Average humidity in August: 60%

The month with the highest relative humidity is March (76%).
The month with the lowest relative humidity is September (57%).

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Average rainfall in August
Healdsburg, CA

Average rainfall in August - Healdsburg, CA
  • Average rainfall in August: 0.04"

The wettest month (with the highest rainfall) is February (4.33").
The driest months (with the least rainfall) are July and August (0.04").

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Average rainfall days in August
Healdsburg, CA

Average rainfall days in August - Healdsburg, CA
  • Average rainfall days in August: 0.8 days

The month with the highest number of rainy days is March (14.2 days).
The month with the least rainy days is August (0.8 days).

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Average snowfall in August
Healdsburg, CA

Average snowfall in August - Healdsburg, CA
  • Average snowfall in August: 0"

The month with the highest snowfall is February (0.04").
The months with the least snowfall are January, March, April, May, June, July, August, September, October, November and December (0").

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Average snowfall days in August
Healdsburg, CA

Average snowfall days in August - Healdsburg, CA
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is February (0.1 days).
The months with the least snowfall days are January, March, April, May, June, July, August, September, October, November and December (0 days).

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

Average daylight in August / Average sunshine in August - Healdsburg, CA
  • Average daylight in August: 13h and 4min

The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).

  • Average sunshine in August: 11h and 5min

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 36min).

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Average sunshine days in August
Healdsburg, CA

Average sunshine days in August - Healdsburg, CA
  • Average sunshine days in August: 29.4 days

The month with the most sunshine days is July (29.8 days).
The month with the least sunshine days is March (14.8 days).

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Average UV index in August
Healdsburg, CA

Average UV index in August - Healdsburg, CA
  • Average UV index in August: 6

The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 3).

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Average cloud cover in August
Healdsburg, CA

Average cloud cover in August - Healdsburg, CA
  • Average cloud cover in August: 6

The month with the most cloud cover is March (Cloud cover 41).
The months with the least cloud cover are July and August (Cloud cover 6).

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Average visibility in August
Healdsburg, CA

Average visibility in August - Healdsburg, 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).

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Healdsburg, California, USA

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