July weather forecast
Union City, CA

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Weather in July

July, the same as June, is a moderately hot summer month in Union City, California, with an average temperature fluctuating between 80.1°F (26.7°C) and 55.2°F (12.9°C).

Temperature

Union City sees its peak of temperatures during July and August, with an average high-temperature of 80.1°F (26.7°C).

Humidity

The average relative humidity in July in Union City is 63%.

Rainfall

June through August are months without rainfall in Union City.

Daylight

In Union City, California, the average length of the day in July is 14h and 28min.
On the first day of July in Union City, sunrise is at 5:50 am and sunset at 8:33 pm. On the last day of the month, sunrise is at 6:12 am and sunset at 8:17 pm PDT.

Sunshine

The month with the most sunshine is July, with an average of 12.2h of sunshine.

UV index

The months with the highest UV index are June and July, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.
Note: The daily high UV index of 6 in July translates into this advice:
Use measures and accept sun safety conventions. Guarding against skin and eye trauma is of high priority. The hours from 10 a.m. to 4 p.m. have the most intense UV radiation. As much as possible, limit direct sun exposure during this period. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat.
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Frequently asked questions

What part of the year is the hottest in Union City?

July and August, when the average high-temperature in Union City, California, reaches 80.1°F (26.7°C), are the warmest months.

What are July temperatures in Union City?

July temperatures in Union City vary between a high-temperature of 80.1°F (26.7°C) and a low-temperature of 55.2°F (12.9°C).

What is the average humidity in July in Union City?

The average relative humidity in July is 63%.

What is the driest month in Union City?

June through August are months without rainfall in Union City.

What is the average length of the day in July in Union City?

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

What time are sunrise and sunset in July in Union City?

On the first day of July in Union City, sunrise is at 5:50 am and sunset at 8:33 pm. On the last day of the month, sunrise is at 6:12 am and sunset at 8:17 pm PDT.

What month has the most sunshine in Union City?

The month with the most sunshine in Union City is July, with an average of 12.2h of sunshine.

How many hours of sunshine does Union City have in July?

In Union City, the average sunshine duration in July is 12.2h.

What are the months with the highest UV index in Union City?

June and July, with an average maximum UV index of 6, are months with the highest UV index.

What is the UV index reading in July in Union City?

In Union City, California, the average daily maximum UV index in July is 6. A UV Index estimate of 6 to 7 represents a high health threat from unprotected exposure to UV radiation.
Average humidity
Average rainfall
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in July
Union City, CA

Average temperature in July - Union City, CA
  • Average high temperature in July: 80.1°F

The warmest months (with the highest average high temperature) are July and August (80.1°F).
The month with the lowest average high temperature is December (56.3°F).

  • Average low temperature in July: 55.2°F

The months with the highest average low temperature are August and September (56.7°F).
The coldest month (with the lowest average low temperature) is December (43.7°F).

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Average pressure in July
Union City, CA

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

The month with the highest atmospheric pressure is January (30.13"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.92"Hg).

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Average wind speed in July
Union City, CA

Average wind speed in July - Union City, CA
  • Average wind speed in July: 5.3mph

The windiest month (with the highest average wind speed) is May (6.4mph).
The calmest months (with the lowest average wind speed) are October and November (4.7mph).

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Average humidity in July
Union City, CA

Average humidity in July - Union City, CA
  • Average humidity in July: 63%

The month with the highest relative humidity is March (73%).
The months with the lowest relative humidity are September and October (62%).

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Average rainfall in July
Union City, CA

Average rainfall in July - Union City, CA
  • Average rainfall in July: 0"

The wettest month (with the highest rainfall) is February (0.47").
The driest months (with the least rainfall) are June, July and August (0").

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Average rainfall days in July
Union City, CA

Average rainfall days in July - Union City, CA
  • Average rainfall days in July: 0.3 days

The month with the highest number of rainy days is March (7.3 days).
The month with the least rainy days is July (0.3 days).

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Average daylight in July /
Average sunshine in July
Union City, CA

Average daylight in July / Average sunshine in July - Union City, 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 12min).
The month with the least sunshine is December (Average sunshine: 6h and 0min).

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Average sunshine days in July
Union City, CA

Average sunshine days in July - Union City, CA
  • Average sunshine days in July: 30.4 days

The months with the most sunshine days are July and August (30.4 days).
The month with the least sunshine days is February (22.2 days).

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Average UV index in July
Union City, CA

Average UV index in July - Union City, CA
  • Average UV index in July: 6

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

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Average cloud cover in July
Union City, CA

Average cloud cover in July - Union City, CA
  • Average cloud cover in July: 6

The month with the most cloud cover is March (Cloud cover 34).
The month with the least cloud cover is July (Cloud cover 6).

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Average visibility in July
Union City, CA

Average visibility in July - Union City, 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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Union City, California, USA

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