June weather forecast
Fullerton, CA

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Trees and neat lawns of the famous Muckenthaler Community Center in Fullerton, California
Trees and neat lawns of the famous Muckenthaler Community Center in Fullerton, California

Weather in June

June marks the official onset of summer in Fullerton, California with a noticeable rise in temperature. The maximum temperature averages reach 76.6°F (24.8°C), making it one of the warmer months of the year. The sliding scale of rainfall shows a significant drop in June to only 0.04" (1mm) and offers an optimal outdoor experience. The city radiates an air of vivacity as it gets bathed in approximately 14.4 hours of daylight and 11.9 hours of sunshine daily. Low chances of rain and steady performance of sunshine make June a fine summertime choice for visiting.

Temperature

The onset of June in Fullerton brings an average high-temperature of a warm 76.6°F (24.8°C), nearly matching the May temperature. An average low-temperature of 58.8°F (14.9°C) is anticipated throughout the nights during June.

Humidity

With an average relative humidity of 65%, June is the most humid month.

Rainfall

The month with the least rainfall in Fullerton is June, when the rain falls for 1.5 days and typically collects 0.04" (1mm) of precipitation.

Daylight

The month with the longest days is June, with an average of 14h and 24min of daylight.
On the first day of June in Fullerton, sunrise is at 5:41 am and sunset at 7:57 pm. On the last day of the month, sunrise is at 5:44 am and sunset at 8:06 pm PDT.

Sunshine

The average sunshine in June in Fullerton is 11.9h.

UV index

The months with the highest UV index in Fullerton are June through September, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV rays for the ordinary person.
Note: The maximum UV index, 6 during June, leads to the following recommendations:
Act on precautions and pay attention to sun safety recommendations. Avoidance of sunburn is obligatory. Stay out of direct sunlight between 10 a.m. and 4 p.m., when UV radiation is most intense, and remember that not all shade structures provide complete protection. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.
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Frequently asked questions

What is the average June temperature in Fullerton?

In June, the average high-temperature and low-temperature are 76.6°F (24.8°C) and 58.8°F (14.9°C) respectively.

What is the most humid month in Fullerton?

The most humid month in Fullerton is June, with an average relative humidity of 65%.

What is the average humidity in June in Fullerton?

In Fullerton, the average relative humidity in June is 65%.

What is the driest month in Fullerton?

The month with the least rainfall in Fullerton is June, when the rain falls for 1.5 days and typically collects 0.04" (1mm) of precipitation.

How much does it rain in Fullerton in June?

In June, the rain falls for 1.5 days. Throughout June, 0.04" (1mm) of precipitation is accumulated.

When are the longest days in Fullerton?

June has the longest days of the year in Fullerton, California, with an average of 14h and 24min of daylight.

What is the average length of the day in June in Fullerton?

In Fullerton, the average day length in June is 14h and 22min.

When is the sunrise / sunset in June in Fullerton?

In June, on the first day of the month, sunrise is at 5:41 am and sunset at 7:57 pm. On the last day of the month, in Fullerton, California, sunrise is at 5:44 am and sunset at 8:06 pm PDT.

How long on average sun shines in June in Fullerton?

The average sunshine duration in June in Fullerton, California, is 11.9h.

What are the months with the highest UV index in Fullerton?

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

How high is the UV index in June in Fullerton?

The average daily maximum UV index in June in Fullerton is 6. A UV Index value of 6 to 7 symbolizes a high health threat from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in June
Fullerton, CA

Average temperature in June - Fullerton, CA
  • Average high temperature in June: 76.6°F

The warmest month (with the highest average high temperature) is August (83.5°F).
The month with the lowest average high temperature is December (64°F).

  • Average low temperature in June: 58.8°F

The month with the highest average low temperature is August (65.5°F).
The coldest month (with the lowest average low temperature) is February (50.2°F).

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Average pressure in June
Fullerton, CA

Average pressure in June - Fullerton, CA
  • Average pressure in June: 29.88"Hg

The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).

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Average wind speed in June
Fullerton, CA

Average wind speed in June - Fullerton, CA
  • Average wind speed in June: 5.3mph

The windiest month (with the highest average wind speed) is April (6mph).
The calmest months (with the lowest average wind speed) are September and October (4.7mph).

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Average humidity in June
Fullerton, CA

Average humidity in June - Fullerton, CA
  • Average humidity in June: 65%

The month with the highest relative humidity is June (65%).
The month with the lowest relative humidity is November (51%).

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Average rainfall in June
Fullerton, CA

Average rainfall in June - Fullerton, CA
  • Average rainfall in June: 0.04"

The wettest month (with the highest rainfall) is December (1.54").
The driest month (with the least rainfall) is June (0.04").

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Average rainfall days in June
Fullerton, CA

Average rainfall days in June - Fullerton, CA
  • Average rainfall days in June: 1.5 days

The month with the highest number of rainy days is March (7.3 days).
The month with the least rainy days is June (1.5 days).

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Average daylight in June /
Average sunshine in June
Fullerton, CA

Average daylight in June / Average sunshine in June - Fullerton, CA
  • Average daylight in June: 14h and 2min

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 June: 11h and 5min

The months with the most sunshine are July and August (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 6h and 42min).

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Average sunshine days in June
Fullerton, CA

Average sunshine days in June - Fullerton, CA
  • Average sunshine days in June: 24.3 days

The month with the most sunshine days is August (25.8 days).
The month with the least sunshine days is February (20.6 days).

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Average UV index in June
Fullerton, CA

Average UV index in June - Fullerton, CA
  • Average UV index in June: 6

The months with the highest UV index are June, July, August and September (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 4).

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Average cloud cover in June
Fullerton, CA

Average cloud cover in June - Fullerton, CA
  • Average cloud cover in June: 11

The months with the most cloud cover are March and December (Cloud cover 22).
The month with the least cloud cover is August (Cloud cover 5).

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Average visibility in June
Fullerton, CA

Average visibility in June - Fullerton, 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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Fullerton, California, USA

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