August weather forecast
Martinez, CA

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A cow grazing in the vast Martinez Hills
A cow grazing in the vast Martinez Hills' fields near Martinez Town, California

Weather in August

August, the last month of the summer in Martinez, is also a moderately hot month, with temperature in the range of an average low of 57.4°F (14.1°C) and an average high of 83.8°F (28.8°C).

Temperature

During August, Martinez observes a subtle ascent to a still moderately hot 83.8°F (28.8°C) from July's 84.2°F (29°C) in the average high-temperature. A steep decline to a moderate 57.4°F (14.1°C) characterizes the August nights.

Heat index

August's heat index is appraised at a tropical 87.8°F (31°C). A sense of exhaustion might occur with extended exposure and activity, potentially causing heat cramps.
Be informed that the heat index values are oriented around shady conditions and gentle breezes. Direct sunlight exposure may cause a 15 Fahrenheit (8 Celsius) degrees rise in the heat index.
Note: The heat index, also known as 'real feel' or 'feels like', takes into account both air temperature and humidity to illustrate what people actually feel. The effect is personal, with varied weather perceptions among individuals due to differences in body mass, stature, and physical activity. Recognize that direct exposure to the sun can escalate the heat effect, potentially adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are particularly meaningful for babies and toddlers. Typically, young kids are at a higher risk than adults since they sweat less. Also, the larger skin surface in proportion to their small bodies and the heightened heat production due to their active nature adds to their vulnerability.

Humidity

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

Rainfall

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

Daylight

In Martinez, the average length of the day in August is 13h and 35min.
On the first day of the month, sunrise is at 6:12 am and sunset at 8:17 pm. On the last day of August, sunrise is at 6:38 am and sunset at 7:38 pm PDT.

Sunshine

In Martinez, the average sunshine in August 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 value of 6 to 7 symbolizes a high threat to health from unsafe exposure to UV radiation for ordinary individuals.
Note: In August, the maximum UV index of 6 translates into these guidelines:
Endorse precautions and be consistent with sun safety guidelines. Preventing sunburn is paramount. Avoid exposure to the Sun and try to stay in the shade between 10 a.m. and 4 p.m., when UV radiation is most potent, but be aware that parasols or canopies may not offer full protection. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat.
Updated: Jul 29, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How hot is August?

The high-temperature, in August, in Martinez, is 83.8°F (28.8°C), while the low-temperature averages to 57.4°F (14.1°C). The average heat index (a.k.a. 'feels like', 'apparent temperature'), which combines relative humidity and air temperature, in August is appraised at 87.8°F (31°C).

What is the average humidity in August?

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

What is the driest month?

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

How much does it rain in August?

In August, the rain falls for 1 days. Throughout August, 0.04" (1mm) of precipitation is accumulated.

How many hours of daylight does Martinez have in August?

In August, the average day length is 13h and 35min.

When is the sunrise / sunset in August?

On the first day of August, 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 7:38 pm PDT.

How long on average sun shines in August?

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

When is the highest UV index?

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

How high is the UV index in August?

In August, the average daily maximum UV index in Martinez is 6. A UV Index value of 6 to 7 symbolizes a high health threat from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in August
Martinez, CA

Average temperature in August - Martinez, CA
  • Average high temperature in August: 83.8°F

The warmest month (with the highest average high temperature) is July (84.2°F).
The month with the lowest average high temperature is December (55.4°F).

  • Average low temperature in August: 57.4°F

The month with the highest average low temperature is September (57.6°F).
The coldest months (with the lowest average low temperature) are January and December (42.3°F).

Average pressure in August
Martinez, CA

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

The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

Average wind speed in August
Martinez, CA

Average wind speed in August - Martinez, CA
  • Average wind speed in August: 6.7mph

The windiest month (with the highest average wind speed) is May (7.4mph).
The calmest month (with the lowest average wind speed) is November (4.5mph).

Average humidity in August
Martinez, CA

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

The month with the highest relative humidity is March (74%).
The months with the lowest relative humidity are September and October (56%).

Average rainfall in August
Martinez, CA

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

The wettest month (with the highest rainfall) is February (0.98").
The driest months (with the least rainfall) are July and August (0.04").

Average rainfall days in August
Martinez, CA

Average rainfall days in August - Martinez, CA
  • Average rainfall days in August: 1 days

The month with the highest number of rainy days is March (8.3 days).
The month with the least rainy days is August (1 days).

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

Average daylight in August / Average sunshine in August - Martinez, 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 36min).

  • 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 42min).

Average sunshine days in August
Martinez, CA

Average sunshine days in August - Martinez, CA
  • Average sunshine days in August: 28.9 days

The month with the most sunshine days is July (29 days).
The months with the least sunshine days are February and March (22.1 days).

Average UV index in August
Martinez, CA

Average UV index in August - Martinez, 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).

Average cloud cover in August
Martinez, CA

Average cloud cover in August - Martinez, CA
  • Average cloud cover in August: 9

The months with the most cloud cover are March and December (Cloud cover 36).
The month with the least cloud cover is July (Cloud cover 7).

Average visibility in August
Martinez, CA

Average visibility in August - Martinez, 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).

Martinez, California, USA

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