June weather forecast
Rancho Cucamonga, CA

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Weather in June

June, the first month of the summer in Rancho Cucamonga, is also a moderately hot month, with an average temperature ranging between min 58.6°F (14.8°C) and max 84.7°F (29.3°C).

Temperature

In Rancho Cucamonga, the onset of June comes with a modest high-temperature shift, transitioning from May's 76.6°F (24.8°C) to a still moderately hot 84.7°F (29.3°C). A marked drop from daytime peak temperatures to an average low-temperature of 58.6°F (14.8°C) is observed during the nights in June.

Heat index

For June, the heat index is computed to be a tropical 86°F (30°C). Remaining active during long-lasting exposure could cause fatigue, leading to heat cramps.
In reference to the heat index, it's for places in shade and with a slight wind. An exposure to direct sunlight may lift the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', represents the fusion of temperature and moisture in the air to suggest how warm it feels. An individual's temperature experience can be influenced by extra factors, including metabolic differences, activity levels, and clothing. Be mindful that being in direct sunlight might mean feeling hotter, with the heat index rising by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Young ones often disregard the necessity to rest and hydrate. Thirst usually indicates advanced dehydration - hence, it is key to stay hydrated, particularly during ongoing physical activities.

Humidity

In Rancho Cucamonga, the average relative humidity in June is 50%.

Rainfall

The month with the least rainfall is June, when the rain falls for 0.9 days and typically collects 0.04" (1mm) of precipitation.

Snowfall

January, March through December are months without snowfall in Rancho Cucamonga.

Daylight

The month with the longest days in Rancho Cucamonga is June, with an average of 14h and 24min of daylight.
On the first day of June, sunrise is at 5:39 am and sunset at 7:57 pm. On the last day of the month, sunrise is at 5:42 am and sunset at 8:06 pm PDT.

Sunshine

The average sunshine in June in Rancho Cucamonga is 12h.

UV index

In June, the average daily maximum UV index is 6. A UV Index reading of 6 to 7 represents a high health vulnerability from unprotected exposure to Sun's UV rays for average individuals.
Note: An average UV index of 6 in June transforms into this advice:
Act on precautions and pay attention to sun safety recommendations. Avoidance of sunburn is obligatory. The Sun emits the most powerful UV radiation between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage.
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Frequently asked questions

Is it hot in Rancho Cucamonga during June?

The high-temperature in Rancho Cucamonga during June is 84.7°F (29.3°C) and the low-temperature is 58.6°F (14.8°C). In June, the average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which factors the actual air temperature with the relative humidity, is computed to be 86°F (30°C).

What is the average humidity in June in Rancho Cucamonga?

The average relative humidity in June in Rancho Cucamonga is 50%.

What is the driest month in Rancho Cucamonga?

The month with the least rainfall is June, when the rain falls for 0.9 days and typically collects 0.04" (1mm) of precipitation.

How much does it rain in Rancho Cucamonga in June?

In Rancho Cucamonga, in June, during 0.9 rainfall days, 0.04" (1mm) of precipitation is typically accumulated.

When it does not snow in Rancho Cucamonga?

January, March through December are months without snowfall.

When are the longest days in Rancho Cucamonga?

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

How many hours of daylight does Rancho Cucamonga have in June?

In Rancho Cucamonga, California, the average day length in June is 14h and 23min.

When is the sunrise / sunset in June in Rancho Cucamonga?

On the first day of June in Rancho Cucamonga, sunrise is at 5:39 am and sunset at 7:57 pm. On the last day of the month, sunrise is at 5:42 am and sunset at 8:06 pm PDT.

How many hours of sunshine does Rancho Cucamonga have in June?

In Rancho Cucamonga, California, the average sunshine duration in June is 12h.

How high is the UV index in June in Rancho Cucamonga?

The average daily maximum UV index in June in Rancho Cucamonga, California, is 6. A UV Index of 6 to 7 symbolizes a high health threat from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in June
Rancho Cucamonga, CA

Average temperature in June - Rancho Cucamonga, CA
  • Average high temperature in June: 84.7°F

The warmest month (with the highest average high temperature) is August (91.8°F).
The month with the lowest average high temperature is December (61.7°F).

  • Average low temperature in June: 58.6°F

The month with the highest average low temperature is August (66.6°F).
The coldest months (with the lowest average low temperature) are February and December (45.3°F).

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Average pressure in June
Rancho Cucamonga, CA

Average pressure in June - Rancho Cucamonga, CA
  • Average pressure in June: 29.86"Hg

The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).

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Average wind speed in June
Rancho Cucamonga, CA

Average wind speed in June - Rancho Cucamonga, CA
  • Average wind speed in June: 5.5mph

The windiest month (with the highest average wind speed) is May (5.9mph).
The calmest month (with the lowest average wind speed) is September (4.5mph).

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Average humidity in June
Rancho Cucamonga, CA

Average humidity in June - Rancho Cucamonga, CA
  • Average humidity in June: 50%

The months with the highest relative humidity are February, March and May (53%).
The month with the lowest relative humidity is August (41%).

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Average rainfall in June
Rancho Cucamonga, CA

Average rainfall in June - Rancho Cucamonga, CA
  • Average rainfall in June: 0.04"

The wettest month (with the highest rainfall) is February (0.98").
The driest month (with the least rainfall) is June (0.04").

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Average rainfall days in June
Rancho Cucamonga, CA

Average rainfall days in June - Rancho Cucamonga, CA
  • Average rainfall days in June: 0.9 days

The month with the highest number of rainy days is March (6.3 days).
The month with the least rainy days is June (0.9 days).

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Average snowfall days in June
Rancho Cucamonga, CA

Average snowfall days in June - Rancho Cucamonga, CA
  • Average snowfall days in June: 0 days

The month with the highest number of snowfall days is February (0.1 days).
The months with the least snowfall days are January, March, April, May, June, July, August, September, October, November and December (0 days).

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Average daylight in June /
Average sunshine in June
Rancho Cucamonga, CA

Average daylight in June / Average sunshine in June - Rancho Cucamonga, 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: 12h and 0min

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

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Average sunshine days in June
Rancho Cucamonga, CA

Average sunshine days in June - Rancho Cucamonga, CA
  • Average sunshine days in June: 28.3 days

The month with the most sunshine days is June (28.3 days).
The month with the least sunshine days is February (22.8 days).

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Average UV index in June
Rancho Cucamonga, CA

Average UV index in June - Rancho Cucamonga, CA
  • Average UV index in June: 6

The months with the highest UV index are July and August (UV index 7).
The month with the lowest UV index is December (UV index 3).

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Average cloud cover in June
Rancho Cucamonga, CA

Average cloud cover in June - Rancho Cucamonga, CA
  • Average cloud cover in June: 7

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

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Average visibility in June
Rancho Cucamonga, CA

Average visibility in June - Rancho Cucamonga, 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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Rancho Cucamonga, California, USA

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