August weather forecast
La Mesa, CA

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Weather in August

August, the last month of the summer in La Mesa, is another warm month, with an average temperature ranging between max 82.6°F (28.1°C) and min 65.8°F (18.8°C).

Temperature

August, noted for its average high-temperature of 82.6°F (28.1°C) and an average low-temperature of 65.8°F (18.8°C), is considered the warmest month.

Heat index

During August, the heat index is appraised at a tropical 86°F (30°C). Continuing activity during long-lasting exposure might induce tiredness and result in heat cramps.
One should be cognizant that the heat index values are tailored for shaded spots and mild winds. The heat index has the possibility to be enhanced by 15 Fahrenheit (8 Celsius) degrees when there is direct sun exposure.
Note: The heat index, also known as 'real feel' or 'feels like', is a value derived by merging air temperature with the humidity to convey how the climate feels. This effect is personal, influenced by the individual's physical activity and heat sensitivity, shaped by factors including wind, attire, and metabolic variations. It is noteworthy to mention that direct sunlight exposure can augment the felt temperature, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular significance for children. Children commonly overlook the importance of rest and fluid replenishment. Thirst, being a delayed sign of dehydration, emphasizes the need to keep hydration up, especially during lengthy physical activities.

Humidity

In La Mesa, the average relative humidity in August is 62%.

Rainfall

In La Mesa, in August, during 2.8 rainfall days, 0.28" (7mm) of precipitation is typically accumulated. In La Mesa, during the entire year, the rain falls for 54.5 days and collects up to 6.57" (167mm) of precipitation.

Daylight

In August, the average length of the day in La Mesa is 13h and 19min.
On the first day of the month, sunrise is at 6:02 am and sunset at 7:46 pm. On the last day of August, sunrise is at 6:22 am and sunset at 7:13 pm PDT.

Sunshine

The average sunshine in August in La Mesa is 11.9h.

UV index

June through September, with an average maximum UV index of 6, are months with the highest UV index in La Mesa. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation for the average person.
Note: The UV index of 6 during August translates into the following guidance:
Take precautions and utilize sun safety practices. Protection against skin and eye damage is required. Minimize exposure to direct sunlight and seek shade from 10 a.m. to 4 p.m., when UV radiation is most intense, but remember that shade structures may not offer complete protection. Experience reduced UV exposure by about half when donning a wide-brim hat.
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Frequently asked questions

What part of the year is the hottest in La Mesa?

The highest temperatures in La Mesa, California, are recorded in August, with averages reaching a high of 82.6°F (28.1°C) and a low of 65.8°F (18.8°C).

Is it hot in La Mesa during August?

In La Mesa, 82.6°F (28.1°C) is the average high-temperature and 65.8°F (18.8°C) is the average low-temperature during August. The average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which calculates the temperature value influenced by the moisture in the air, in August is appraised at 86°F (30°C).

What is the average humidity in August in La Mesa?

In August, the average relative humidity in La Mesa, California, is 62%.

How much does it rain in La Mesa in August?

In La Mesa, during August, the rain falls for 2.8 days and regularly aggregates up to 0.28" (7mm) of precipitation.

How many hours of daylight does La Mesa have in August?

In La Mesa, California, the average day length in August is 13h and 19min.

When is the sunrise / sunset in August in La Mesa?

In August, on the first day of the month, sunrise is at 6:02 am and sunset at 7:46 pm. On the last day of the month, sunrise is at 6:22 am and sunset at 7:13 pm PDT.

How long on average sun shines in August in La Mesa?

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

What is the month with the highest UV index in La Mesa?

The months with the highest UV index in La Mesa are June through September, with an average maximum UV index of 6.

What is the UV index reading in August in La Mesa?

In La Mesa, 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 daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in August
La Mesa, CA

Average temperature in August - La Mesa, CA
  • Average high temperature in August: 82.6°F

The warmest month (with the highest average high temperature) is August (82.6°F).
The month with the lowest average high temperature is December (64.2°F).

  • Average low temperature in August: 65.8°F

The month with the highest average low temperature is August (65.8°F).
The coldest month (with the lowest average low temperature) is February (48.7°F).

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Average pressure in August
La Mesa, CA

Average pressure in August - La Mesa, CA
  • Average pressure in August: 29.88"Hg

The month with the highest atmospheric pressure is January (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).

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Average wind speed in August
La Mesa, CA

Average wind speed in August - La Mesa, CA
  • Average wind speed in August: 4.7mph

The windiest month (with the highest average wind speed) is April (5.7mph).
The calmest month (with the lowest average wind speed) is October (4.5mph).

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Average humidity in August
La Mesa, CA

Average humidity in August - La Mesa, CA
  • Average humidity in August: 62%

The month with the highest relative humidity is May (68%).
The month with the lowest relative humidity is November (55%).

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Average rainfall in August
La Mesa, CA

Average rainfall in August - La Mesa, CA
  • Average rainfall in August: 0.28"

The wettest month (with the highest rainfall) is February (1.3").
The driest month (with the least rainfall) is June (0.08").

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Average rainfall days in August
La Mesa, CA

Average rainfall days in August - La Mesa, CA
  • Average rainfall days in August: 2.8 days

The month with the highest number of rainy days is March (7.8 days).
The month with the least rainy days is June (1.4 days).

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Average daylight in August /
Average sunshine in August
La Mesa, CA

Average daylight in August / Average sunshine in August - La Mesa, CA
  • Average daylight in August: 13h and 2min

The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).

  • 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: 6h and 42min).

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Average sunshine days in August
La Mesa, CA

Average sunshine days in August - La Mesa, CA
  • Average sunshine days in August: 25.7 days

The month with the most sunshine days is June (28.1 days).
The month with the least sunshine days is February (21 days).

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Average UV index in August
La Mesa, CA

Average UV index in August - La Mesa, CA
  • Average UV index in August: 6

The months with the highest UV index are June, July, August and September (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 4).

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Average cloud cover in August
La Mesa, CA

Average cloud cover in August - La Mesa, CA
  • Average cloud cover in August: 8

The month with the most cloud cover is March (Cloud cover 24).
The month with the least cloud cover is August (Cloud cover 8).

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Average visibility in August
La Mesa, CA

Average visibility in August - La Mesa, 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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La Mesa, California, USA

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