June weather forecast
Union City, CA

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Weather in June

The first month of the summer, June, is a moderately hot month in Union City, California, with an average temperature varying between 53.8°F (12.1°C) and 76.8°F (24.9°C).

Temperature

The onset of June brings a minor temperature shift, with the average high-temperature moving from an agreeable 69.8°F (21°C) in May to a warm 76.8°F (24.9°C). Throughout June, Union City registers a distinct decrease from daytime highs, reaching an average low of 53.8°F (12.1°C).

Humidity

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

Rainfall

June through August are months without rainfall.

Daylight

The month with the longest days in Union City is June, with an average of 14h and 42min of daylight.
On the first day of June in Union City, sunrise is at 5:48 am and sunset at 8:24 pm. On the last day of the month, sunrise is at 5:50 am and sunset at 8:33 pm PDT.

Sunshine

In Union City, California, the average sunshine in June is 11.8h.

UV index

The months with the highest UV index in Union City are June and July, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high health hazard from unsafe exposure to UV radiation for the ordinary person.
Note: In June, a regular UV index of 6 translates into these guidelines:
Deflect overexposure. Sun protection is a necessity. The Sun's UV radiation is most potent between the hours of 10 a.m. and 4 p.m. Try to avoid direct sunlight during this time. Tightly woven clothing, when worn loosely, shields effectively against the Sun.
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Frequently asked questions

What are June temperatures in Union City?

June temperatures in Union City, California, vary between a high-temperature of 76.8°F (24.9°C) and a low-temperature of 53.8°F (12.1°C).

What is the average humidity in June in Union City?

In June, the average relative humidity in Union City, California, is 63%.

What is the driest month in Union City?

June through August are months without rainfall.

Does it rain in Union City in June?

In June, in Union City, it doesn't rain. May is the latest month when it rains.

When are the longest days in Union City?

The month with the longest days in Union City is June, with an average of 14h and 42min of daylight.

How many hours of daylight does Union City have in June?

In June, the average day length is 14h and 43min.

When is the sunrise / sunset in June in Union City?

On the first day of June in Union City, California, sunrise is at 5:48 am and sunset at 8:24 pm. On the last day of the month, sunrise is at 5:50 am and sunset at 8:33 pm PDT.

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

In Union City, California, the average sunshine duration in June is 11.8h.

When is 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 in Union City, California.

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

In June, the average daily maximum UV index in Union City is 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from exposure to Sun's UV rays.
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 June
Union City, CA

Average temperature in June - Union City, CA
  • Average high temperature in June: 76.8°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 June: 53.8°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 June
Union City, CA

Average pressure in June - Union City, CA
  • Average pressure in June: 29.92"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 June
Union City, CA

Average wind speed in June - Union City, CA
  • Average wind speed in June: 6.1mph

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 June
Union City, CA

Average humidity in June - Union City, CA
  • Average humidity in June: 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 June
Union City, CA

Average rainfall in June - Union City, CA
  • Average rainfall in June: 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 June
Union City, CA

Average rainfall days in June - Union City, CA
  • Average rainfall days in June: 0.6 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 June /
Average sunshine in June
Union City, CA

Average daylight in June / Average sunshine in June - Union City, CA
  • Average daylight in June: 14h and 4min

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 June: 11h and 5min

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 June
Union City, CA

Average sunshine days in June - Union City, CA
  • Average sunshine days in June: 29 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 June
Union City, CA

Average UV index in June - Union City, CA
  • Average UV index in June: 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 June
Union City, CA

Average cloud cover in June - Union City, CA
  • Average cloud cover in June: 12

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 June
Union City, CA

Average visibility in June - Union City, CA
  • Average visibility in June: 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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