July weather forecastUnion City, CA

July

Weather in July

July, like June, in Union City, California, is another warm summer month, with temperature in the range of an average high of 80.1°F (26.7°C) and an average low of 55.2°F (12.9°C).

Temperature

The warmest period falls in July and August, when the average high-temperature reaches 80.1°F (26.7°C).

Humidity

The average relative humidity in July is 63%.

Rainfall

In Union City, rain does not fall in June through August.

Daylight

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

Sunshine

With an average of 12.2h of sunshine, July has the most sunshine of the year.

UV index

June and July, 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 hazard from exposure to the Sun's UV radiation for the average person.
Note: The maximum UV index of 6 during July leads to these instructions:
Shun overexposure. Protection from sun ravages is indispensable. Seek shade and limit direct Sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its peak, but be aware that not all shade structures provide complete sun protection. Experience reduced UV exposure by about half when donning a wide-brim hat.

Updated: Aug 26, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

The yearly peak temperatures in Union City, California, occur in July and August, averaging a high-temperature of 80.1°F (26.7°C).

The high-temperature, in July, in Union City, is 80.1°F (26.7°C), while the low-temperature averages to 55.2°F (12.9°C).

The average relative humidity in July is 63%.

In Union City, rain does not fall in June through August.

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

On the first day of July, 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.

With an average of 12.2h of sunshine, July has the most sunshine of the year.

The average sunshine duration in July is 12.2h.

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

In July, the average daily maximum UV index is 6. A UV Index value of 6 to 7 symbolizes a high health threat from exposure to the Sun's UV radiation.

Today

Tomorrow

Long-term

Year J F M A M J July A S O N D

Jun

July

Aug

Average high temperature

76.8°F

80.1°F

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

6.8mph

6mph

5.8mph

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average daylight

Average sunshine

Average sunshine days

30.4

Average UV index

Average cloud cover

12%

Average visibility

6mi

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).

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).

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).

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%).

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").

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).

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

Average daylight in July: 14h and 30min

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 12min

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).

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).

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).

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).

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).