August weather forecast and climate
Upper Lake, CA

Weather in August

August, the last month of the summer, in Upper Lake, is also a hot month, with temperature in the range of an average low of 57.4°F (14.1°C) and an average high of 89.1°F (31.7°C).

Temperature

In Upper Lake, California, the average high-temperature in August is essentially the same as in July - a still tropical 89.1°F (31.7°C). In Upper Lake, the average low-temperature is 57.4°F (14.1°C).

Heat index

In August, the average heat index is evaluated at a hot 92.1°F (33.4°C). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Note that heat index values are valued for light wind and location in the shade. With the exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature', 'feels like', 'apparent temperature', or 'real feel', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. Additional factors like activity, metabolic differences, clothing, and differences in body mass, height, and shape affect individual temperature impact. Be aware that direct exposure to sunlight increases heat impact, and may raise the heat index additionally, by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.

Humidity

In Upper Lake, the average relative humidity is 48%.

Rainfall

In August, in Upper Lake, the rain falls for 1.3 days. Throughout August, 0.08" (2mm) of precipitation is accumulated. Throughout the year, in Upper Lake, there are 92 rainfall days, and 21.02" (534mm) of precipitation is accumulated.

Snowfall

April through October are months without snowfall.

Daylight

In Upper Lake, the average length of the day in August is 13.6h.

Sunshine

In August, the average sunshine in Upper Lake is 11.9h.

UV index

Months with the highest UV index are June through August, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high health hazard from unsafe exposure to the UV radiation for ordinary individuals.
Note: In August, the average maximum UV index of 6 translate into the following recommendations:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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FAQ

What is the temperature in August in Upper Lake?

In August, in Upper Lake, the average high-temperature is 89.1°F (31.7°C), and the average low-temperature is 57.4°F (14.1°C). In August, the average heat index (a.k.a. 'apparent temperature', 'real feel'), that combines relative humidity and air temperature, is calculated to 92.1°F (33.4°C).

What is the average humidity in August in Upper Lake?

In August, the average relative humidity in Upper Lake, California, is 48%.

How much does it rain in Upper Lake in August?

In Upper Lake, California, during August, the rain falls for 1.3 days and regularly aggregates up to 0.08" (2mm) of precipitation.

When it does not snow in Upper Lake?

April through October are months without snowfall.

How many hours of daylight does Upper Lake have in August?

In August, the average length of the day in Upper Lake is 13.6h.

How long on average sun shines in August in Upper Lake?

The average sunshine in August in Upper Lake, California, is 11.9h.

When is the highest UV index in Upper Lake?

Months with the highest UV index in Upper Lake are June through August, with an average maximum UV index of 6.

What is the UV index intensity in August in Upper Lake?

In August, the average daily maximum UV index in Upper Lake, California, is 6. A UV Index estimate of 6 to 7 represents a high health threat from the exposure to the Sun's UV rays.

Average temperature in August
Upper Lake, CA

Average temperature in August - Upper Lake, CA
  • Average high temperature in August: 89.1°F

The warmest month (with the highest average high temperature) is July (89.6°F).
The month with the lowest average high temperature is December (52.3°F).

  • Average low temperature in August: 57.4°F

The month with the highest average low temperature is July (57.7°F).
The coldest month (with the lowest average low temperature) is December (37.2°F).

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Average pressure in August
Upper Lake, CA

Average pressure in August - Upper Lake, CA
  • Average pressure in August: 29.91"

The month with the highest atmospheric pressure is January (30.14").
Months with the lowest atmospheric pressure are June and August (29.91").

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Average wind speed in August
Upper Lake, CA

Average wind speed in August - Upper Lake, CA
  • Average wind speed in August: 4.2mph

The windiest month (with the highest average wind speed) is April (5.3mph).
The calmest month (with the lowest average wind speed) is November (4.1mph).

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Average humidity in August
Upper Lake, CA

Average humidity in August - Upper Lake, CA
  • Average humidity in August: 48%

The month with the highest relative humidity is March (75%).
The month with the lowest relative humidity is July (47%).

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Average rainfall in August
Upper Lake, CA

Average rainfall in August - Upper Lake, CA
  • Average rainfall in August: 0.08"

The wettest month (with the highest rainfall) is February (4.06").
The driest month (with the least rainfall) is July (0.04").

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Average rainfall days in August
Upper Lake, CA

Average rainfall days in August - Upper Lake, CA
  • Average rainfall days in August: 1.3 days

The month with the highest number of rainy days is March (15.9 days).
Months with the least rainy days are July and August (1.3 days).

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Average snowfall in August
Upper Lake, CA

Average snowfall in August - Upper Lake, CA
  • Average snowfall in August: 0"

Months with the highest snowfall are January and February (0.47").
Months with the least snowfall are April, May, June, July, August, September and October (0").

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Average snowfall days in August
Upper Lake, CA

Average snowfall days in August - Upper Lake, CA
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is February (0.9 days).
Months with the least snowfall days are April, May, June, July, August, September and October (0 days).

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Average daylight in August /
Average sunshine in August
Upper Lake, CA

Average daylight in August / Average sunshine in August - Upper Lake, CA
  • Average daylight in August: 13.6h

The month with the longest days is June (Average daylight: 14.9h).
The month with the shortest days is December (Average daylight: 9.5h).

  • Average sunshine in August: 11.9h

The month with the most sunshine is July (Average sunshine: 12h).
The month with the least sunshine is December (Average sunshine: 5.3h).

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Average sunshine days in August
Upper Lake, CA

Average sunshine days in August - Upper Lake, CA
  • Average sunshine days in August: 28.3 days

Months with the most sunshine days are July and August (28.3 days).
The month with the least sunshine days is March (13.7 days).

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Average UV index in August
Upper Lake, CA

Average UV index in August - Upper Lake, CA
  • Average UV index in August: 6

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

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Average cloud cover in August
Upper Lake, CA

Average cloud cover in August - Upper Lake, CA
  • Average cloud cover in August: 5

The month with the most cloud cover is March (Cloud cover 44).
Months with the least cloud cover are July and August (Cloud cover 5).

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Average visibility in August
Upper Lake, CA

Average visibility in August - Upper Lake, CA
  • Average visibility in August: 6mi

Months with the highest visibility are January, February, April, May, June, July, August, September, October and November (6mi).
Months with the lowest visibility are March and December (5mi).

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