July weather forecast
Pasadena, CA

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Pasadena City Hall in California, with neon-lit paths and natural gardens, under a perfect blue night sky
Pasadena City Hall in California, with neon-lit paths and natural gardens, under a perfect blue night sky

Weather in July

July experiences the highest temperatures of the year in Pasadena with a peak reading up to 85.5°F (29.7°C). Signifying midsummer, July comes with longer daylight hours, less rainfall, and a significant increase in UV index. With the sun reigning supreme and minimal cloud coverage, outdoor activities require sun protection measures. Despite the heat, the city thrives in high spirit, with locals and tourists enjoying a multitude of outdoor and water-based activities. An increase in the UV index necessitates sun protection and hydration, to ensure a comfortable and safe exploration of Pasadena.

Temperature

Pasadena notes an average high-temperature of a still warm 85.5°F (29.7°C) in July, displaying minor variation from June. Pasadena experiences a significant reduction from daytime highs with an average low-temperature of 63.5°F (17.5°C) in July.

Heat index

In July, the heat index is calculated to be a hot 87.8°F (31°C). Long-standing exposure and activity could induce a feeling of tiredness and lead to heat cramps.
Factoring in the heat index, values are geared towards shaded areas with light breezes. Exposure to direct sunlight may make the heat index values climb by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', is an indicator that blends the effects of temperature and humidity to depict perceived warmth. This impact is subjective, influenced by the person's physical activity and individual heat perception, affected by factors including wind, attire, and metabolic differences. It is essential to be conscious of the fact that direct sunlight can intensify the felt heat, leading to an elevation in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially vital to children. Kids are usually in more danger than grown-ups as they tend to sweat less. Plus, their bigger skin surface in relation to their small frames and increased heat generation due to their activity level make them more susceptible.

Humidity

The average relative humidity in July in Pasadena is 52%.

Rainfall

In Pasadena, California, in July, during 3.2 rainfall days, 0.24" (6mm) of precipitation is typically accumulated. In Pasadena, during the entire year, the rain falls for 50.1 days and collects up to 8.5" (216mm) of precipitation.

Daylight

The average length of the day in July in Pasadena is 14h and 10min.
On the first day of July in Pasadena, sunrise is at 5:44 am and sunset at 8:08 pm. On the last day of the month, sunrise is at 6:03 am and sunset at 7:54 pm PDT.

Sunshine

June and July, with an average of 12.1h of sunshine, are months with the most sunshine.

UV index

June through September, with an average maximum UV index of 6, are months with the highest UV index. A UV Index of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to UV radiation for the average person.
Note: The maximum daily UV index of 6 in July converts into the following recommendations:
Skirt overexposure. People with light complexions might get scorched in under 20 minutes. To the best of your ability, limit your exposure to the sun between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. During bright days, sunglasses that offer UVA and UVB defense are recommended.
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Frequently asked questions

How hot is it in Pasadena in July?

July temperatures in Pasadena, California, vary between a high-temperature of 85.5°F (29.7°C) and a low-temperature of 63.5°F (17.5°C). The average heat index (a.k.a. 'feels like', 'real feel'), which represents the influence of relative humidity on air temperature, in July is calculated to be 87.8°F (31°C).

What is the average humidity in July in Pasadena?

The average relative humidity in July is 52%.

How many days does it rain in July in Pasadena?

In July, the rain falls for 3.2 days. Throughout July, 0.24" (6mm) of precipitation is accumulated.

How many hours of daylight does Pasadena have in July?

In Pasadena, California, the average day length in July is 14h and 10min.

When are sunrise and sunset in July in Pasadena?

On the first day of July in Pasadena, sunrise is at 5:44 am and sunset at 8:08 pm. On the last day of the month, sunrise is at 6:03 am and sunset at 7:54 pm PDT.

What are the months with the most sunshine in Pasadena?

The months with the most sunshine are June and July, with an average of 12.1h of sunshine.

How many hours of sunshine does Pasadena have in July?

The average sunshine duration in July in Pasadena is 12.1h.

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

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

How high is the UV index in July in Pasadena?

In Pasadena, California, the average daily maximum UV index in July is 6. A UV Index of 6 to 7 symbolizes a high hazard to health from exposure to the Sun's 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
Pasadena, CA

Average temperature in July - Pasadena, CA
  • Average high temperature in July: 85.5°F

The warmest month (with the highest average high temperature) is August (87.1°F).
The month with the lowest average high temperature is December (61.7°F).

  • Average low temperature in July: 63.5°F

The month with the highest average low temperature is August (64.9°F).
The coldest month (with the lowest average low temperature) is February (46.6°F).

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Average pressure in July
Pasadena, CA

Average pressure in July - Pasadena, CA
  • Average pressure in July: 29.91"Hg

The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).

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Average wind speed in July
Pasadena, CA

Average wind speed in July - Pasadena, CA
  • Average wind speed in July: 4.8mph

The windiest month (with the highest average wind speed) is April (5.8mph).
The calmest month (with the lowest average wind speed) is September (4.4mph).

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Average humidity in July
Pasadena, CA

Average humidity in July - Pasadena, CA
  • Average humidity in July: 52%

The month with the highest relative humidity is June (58%).
The month with the lowest relative humidity is November (47%).

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Average rainfall in July
Pasadena, CA

Average rainfall in July - Pasadena, CA
  • Average rainfall in July: 0.24"

The wettest month (with the highest rainfall) is February (1.77").
The driest month (with the least rainfall) is June (0.04").

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Average rainfall days in July
Pasadena, CA

Average rainfall days in July - Pasadena, CA
  • Average rainfall days in July: 3.2 days

The month with the highest number of rainy days is March (7.8 days).
The month with the least rainy days is June (1.1 days).

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

Average daylight in July / Average sunshine in July - Pasadena, CA
  • Average daylight in July: 14h and 1min

The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).

  • Average sunshine in July: 12h and 1min

The months with the most sunshine are June and July (Average sunshine: 12h and 6min).
The months with the least sunshine are January, February and December (Average sunshine: 6h and 54min).

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Average sunshine days in July
Pasadena, CA

Average sunshine days in July - Pasadena, CA
  • Average sunshine days in July: 25.4 days

The month with the most sunshine days is June (27.5 days).
The month with the least sunshine days is February (21.5 days).

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Average UV index in July
Pasadena, CA

Average UV index in July - Pasadena, CA
  • Average UV index in July: 6

The months with the highest UV index are June, July, August and September (UV index 6).
The month with the lowest UV index is December (UV index 3).

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Average cloud cover in July
Pasadena, CA

Average cloud cover in July - Pasadena, CA
  • Average cloud cover in July: 6

The months with the most cloud cover are March and December (Cloud cover 21).
The month with the least cloud cover is August (Cloud cover 5).

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Average visibility in July
Pasadena, CA

Average visibility in July - Pasadena, 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).

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Pasadena, California, USA

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