July weather forecast
Livermore, CA

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A path in the scenic hilly and forest landscape of the famous Lake Del Valle Regional Park in Livermore, California
A path in the scenic hilly and forest landscape of the famous Lake Del Valle Regional Park in Livermore, California

Weather in July

July in Livermore, California, is a hot summer month, with an average temperature fluctuating between 86°F (30°C) and 55.8°F (13.2°C).

Temperature

July, characterized by an average high temperature of 86°F (30°C) and a low temperature of 55.8°F (13.2°C), is generally the warmest month.

Heat index

The heat index value during July is calculated to be a hot 89.6°F (32°C). Ongoing activity coupled with exposure often results in weariness and could induce heat cramps.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to the direct sun could elevate the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', is a composite of temperature and humidity figures to convey how warm it feels. Additional factors encompassing metabolic differences, the level of physical activity, and clothing can impact the individual's perception of temperature. One should be aware that direct sunshine can amplify the perceived temperature, raising the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Children often lack awareness of the importance of taking breaks and rehydrating. The feeling of thirst is a late indication of dehydration, so maintaining hydration, especially during long periods of physical activity, is critical.

Humidity

July and September, with an average relative humidity of 55%, are the least humid months.

Rainfall

In Livermore, in July, during 2.1 rainfall days, 0.08" (2mm) of precipitation is typically accumulated. In Livermore, during the entire year, the rain falls for 70.6 days and collects up to 11.3" (287mm) of precipitation.

Daylight

In July, the average length of the day is 14h and 28min.
On the first day of July, sunrise is at 5:49 am and sunset at 8:32 pm. On the last day of the month, sunrise is at 6:10 am and sunset at 8:16 pm PDT.

Sunshine

July has the most sunshine of the year, with an average of 12.1h of sunshine.

UV index

The months with the highest UV index are June through August, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV radiation for ordinary individuals.
Note: In July, the maximum UV index of 6 transforms into these recommendations:
Continue precautions and advocate sun safety advice. Deterrence of sunburn is indispensable. Avoid direct Sun exposure and seek shade between 10 a.m. and 4 p.m., when UV radiation is at its peak, but keep in mind that not all shade structures provide complete protection. Opt for tightly woven and loose clothing to enhance protection from the Sun.
Updated: Aug 16, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What month is the hottest?

In Livermore, the peak average temperatures are observed in July, with a high of 86°F (30°C) and a low of 55.8°F (13.2°C).

How hot is July?

The high-temperature, in July, in Livermore, records 86°F (30°C), while the low-temperature is 55.8°F (13.2°C). In July, the average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which combines relative humidity and air temperature, is calculated to be 89.6°F (32°C).

What is the least humid month?

July and September, with an average relative humidity of 55%, are the least humid months.

What is the average humidity in July?

The average relative humidity in July in Livermore is 55%.

How much does it rain in July?

In July, the rain falls for 2.1 days. Throughout July, 0.08" (2mm) of precipitation is accumulated.

What is the average length of the day in July?

In July, the average day length is 14h and 28min.

What time are sunrise and sunset in July?

On the first day of July, sunrise is at 5:49 am and sunset at 8:32 pm. On the last day of the month, sunrise is at 6:10 am and sunset at 8:16 pm PDT.

What month has the most sunshine?

July has the most sunshine of the year, with an average of 12.1h of sunshine.

How long on average sun shines in July in Livermore?

In Livermore, the average sunshine duration in July is 12.1h.

When is the highest UV index in Livermore?

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 July?

In Livermore, the average daily maximum UV index in July is 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability 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 July
Livermore, CA

Average temperature in July - Livermore, CA
  • Average high temperature in July: 86°F

The warmest month (with the highest average high temperature) is July (86°F).
The month with the lowest average high temperature is December (54.9°F).

  • Average low temperature in July: 55.8°F

The month with the highest average low temperature is August (56.7°F).
The coldest month (with the lowest average low temperature) is January (41.4°F).

Average pressure in July
Livermore, CA

Average pressure in July - Livermore, CA
  • Average pressure in July: 29.93"Hg

The month with the highest atmospheric pressure is January (30.14"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.92"Hg).

Average wind speed in July
Livermore, CA

Average wind speed in July - Livermore, CA
  • Average wind speed in July: 6.1mph

The windiest months (with the highest average wind speed) are May and June (6.5mph).
The calmest month (with the lowest average wind speed) is November (4.2mph).

Average humidity in July
Livermore, CA

Average humidity in July - Livermore, CA
  • Average humidity in July: 55%

The month with the highest relative humidity is March (74%).
The months with the lowest relative humidity are July and September (55%).

Average rainfall in July
Livermore, CA

Average rainfall in July - Livermore, CA
  • Average rainfall in July: 0.08"

The wettest month (with the highest rainfall) is February (2.09").
The driest month (with the least rainfall) is August (0.04").

Average rainfall days in July
Livermore, CA

Average rainfall days in July - Livermore, CA
  • Average rainfall days in July: 2.1 days

The month with the highest number of rainy days is March (12.7 days).
The month with the least rainy days is August (1.3 days).

Average daylight in July /
Average sunshine in July
Livermore, CA

Average daylight in July / Average sunshine in July - Livermore, CA
  • Average daylight in July: 14h and 3min

The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).

  • Average sunshine in July: 12h and 1min

The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 0min).

Average sunshine days in July
Livermore, CA

Average sunshine days in July - Livermore, CA
  • Average sunshine days in July: 28.3 days

The month with the most sunshine days is August (28.8 days).
The month with the least sunshine days is March (17.6 days).

Average UV index in July
Livermore, CA

Average UV index in July - Livermore, CA
  • Average UV index in July: 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 July
Livermore, CA

Average cloud cover in July - Livermore, CA
  • Average cloud cover in July: 5

The month with the most cloud cover is March (Cloud cover 35).
The month with the least cloud cover is July (Cloud cover 5).

Average visibility in July
Livermore, CA

Average visibility in July - Livermore, CA
  • Average visibility in July: 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).

Livermore, California, USA

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