June weather forecast and climate
Upland, CA

Weather in June

June, the first month of the summer, in Upland, is still a warm month, with average temperature fluctuating between 84°F (28.9°C) and 58.5°F (14.7°C).

Temperature

In June, the average high-temperature marginally rises, from 76.6°F (24.8°C) in May, to a still moderately hot 84°F (28.9°C). The average low-temperature, in Upland, California, is 58.5°F (14.7°C).

Heat index

The average heat index in June is computed to be 85.5°F (29.7°C). Exhaustion is likely with prolonged exposure and activity. Sustaining activity may result in heat cramps.
Take into consideration that the heat index values are calculated for shade and light wind conditions. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel', 'apparent temperature', 'felt air temperature', or 'feels like', is a measure that combines air temperature and relative humidity into a single value that indicates how hot the weather feels. Additional factors like pregnancy, clothing, wind, and activity influence one's weather impression. Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.

Humidity

In Upland, the average relative humidity is 51%.

Rainfall

The month with the least rainfall in Upland is June when the rain falls for 1.2 days and typically collects 0.04" (1mm) of precipitation.

Snowfall

January, March through December are months without snowfall.

Daylight

With an average of 14.4h of daylight, June has the longest days of the year in Upland.

Sunshine

The average sunshine in June is 12h.

UV index

In June, the average daily maximum UV index in Upland is 6. A UV Index estimate of 6 to 7 represents a high health risk from unsafe exposure to the UV radiation for the average person.
Note: The average daily UV index of 6 transform into the following instructions:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
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FAQ

What is the temperature in June in Upland?

In Upland, California, in June, the average high-temperature is 84°F (28.9°C), and the average low-temperature is 58.5°F (14.7°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 85.5°F (29.7°C).

What is the average humidity in June in Upland?

The average relative humidity in June in Upland is 51%.

What is the driest month in Upland?

The month with the least rainfall in Upland, California, is June when the rain falls for 1.2 days and typically collects 0.04" (1mm) of precipitation.

How much does it rain in Upland in June?

In Upland, California, during June, the rain falls for 1.2 days and regularly aggregates up to 0.04" (1mm) of precipitation.

When it does not snow in Upland?

January, March through December are months without snowfall in Upland.

When are the longest days in Upland?

The month with the longest days in Upland is June, with an average of 14.4h of daylight.

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

In June, the average length of the day in Upland, California, is 14.4h.

How long on average sun shines in June in Upland?

In Upland, the average sunshine in June is 12h.

How high is the UV index in June in Upland?

In Upland, California, the average daily maximum UV index in June is 6. A UV Index of 6 to 7 symbolizes a high hazard to health from unsafe exposure to the Sun's UV rays.

Average temperature in June
Upland, CA

Average temperature in June - Upland, CA
  • Average high temperature in June: 84°F

The warmest month (with the highest average high temperature) is August (91°F).
The month with the lowest average high temperature is December (62.1°F).

  • Average low temperature in June: 58.5°F

The month with the highest average low temperature is August (65.8°F).
The coldest month (with the lowest average low temperature) is December (45.5°F).

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Average pressure in June
Upland, CA

Average pressure in June - Upland, CA
  • Average pressure in June: 29.86"

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

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Average wind speed in June
Upland, CA

Average wind speed in June - Upland, CA
  • Average wind speed in June: 5.4mph

The windiest months (with the highest average wind speed) are April and May (5.8mph).
The calmest month (with the lowest average wind speed) is September (4.4mph).

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Average humidity in June
Upland, CA

Average humidity in June - Upland, CA
  • Average humidity in June: 51%

Months with the highest relative humidity are March and May (54%).
The month with the lowest relative humidity is August (42%).

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Average rainfall in June
Upland, CA

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

The wettest month (with the highest rainfall) is February (1.77").
The driest month (with the least rainfall) is June (0.04").

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Average rainfall days in June
Upland, CA

Average rainfall days in June - Upland, CA
  • Average rainfall days in June: 1.2 days

The month with the highest number of rainy days is March (7.1 days).
The month with the least rainy days is June (1.2 days).

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Average snowfall days in June
Upland, CA

Average snowfall days in June - Upland, CA
  • Average snowfall days in June: 0 days

The month with the highest number of snowfall days is February (0.1 days).
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
Upland, CA

Average daylight in June / Average sunshine in June - Upland, CA
  • Average daylight in June: 14.4h

The month with the longest days is June (Average daylight: 14.4h).
The month with the shortest days is December (Average daylight: 9.9h).

  • Average sunshine in June: 12h

The month with the most sunshine is July (Average sunshine: 12.1h).
Months with the least sunshine are February and December (Average sunshine: 6.9).

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Average sunshine days in June
Upland, CA

Average sunshine days in June - Upland, CA
  • Average sunshine days in June: 28.2 days

The month with the most sunshine days is June (28.2 days).
The month with the least sunshine days is February (21.5 days).

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Average UV index in June
Upland, CA

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

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
Upland, CA

Average cloud cover in June - Upland, CA
  • Average cloud cover in June: 7

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

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Average visibility in June
Upland, CA

Average visibility in June - Upland, CA
  • Average visibility in June: 6mi

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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