June weather forecast and climate
Guerneville, CA

Weather in June

The first month of the summer, June, is a moderately hot month in Guerneville, California, with average temperature fluctuating between 77.2°F (25.1°C) and 51.8°F (11°C).

Temperature

In Guerneville, the average high-temperature in June slightly increases, from an agreeable 69.6°F (20.9°C) in May, to a warm 77.2°F (25.1°C). In June, in Guerneville, the average low-temperature is 51.8°F (11°C).

Humidity

In June, the average relative humidity in Guerneville is 64%.

Rainfall

In Guerneville, in June, during 1.8 rainfall days, 0.12" (3mm) of precipitation is typically accumulated. Throughout the year, in Guerneville, there are 60.1 rainfall days, and 12.87" (327mm) of precipitation is accumulated.

Daylight

June has the longest days of the year, with an average of 14.8h of daylight.

Sunshine

In Guerneville, the average sunshine is 11.4h.

UV index

Months with the highest UV index in Guerneville are June through August, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high health risk from the exposure to the Sun's UV rays for the average person.
Note: The average daily UV index of 6 transform into the following instructions:
Take precautions and utilize sun safety practices. Protection against the skin and eye damage is required. 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 Guerneville?

In June, the average high-temperature is 77.2°F (25.1°C), and the average low-temperature is 51.8°F (11°C).

What is the average humidity in June in Guerneville?

In Guerneville, the average relative humidity in June is 64%.

How many days does it rain in June in Guerneville?

In Guerneville, in June, during 1.8 rainfall days, 0.12" (3mm) of precipitation is typically accumulated.

When are the longest days in Guerneville?

With an average of 14.8h of daylight, June has the longest days of the year in Guerneville, California.

How many hours of daylight does Guerneville have in June?

In June, the average length of the day is 14.8h.

How long on average sun shines in June in Guerneville?

In June, the average sunshine is 11.4h.

What is the month with the highest UV index in Guerneville?

June through August, with an average maximum UV index of 6, are months with the highest UV index.

What is the UV index reading in June in Guerneville?

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

Average temperature in June
Guerneville, CA

Average temperature in June - Guerneville, CA
  • Average high temperature in June: 77.2°F

The warmest month (with the highest average high temperature) is August (81°F).
The month with the lowest average high temperature is December (56.3°F).

  • Average low temperature in June: 51.8°F

Months with the highest average low temperature are August and September (53.4°F).
The coldest month (with the lowest average low temperature) is December (41.4°F).

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Average pressure in June
Guerneville, CA

Average pressure in June - Guerneville, CA
  • Average pressure in June: 29.92"

The month with the highest atmospheric pressure is January (30.13").
Months with the lowest atmospheric pressure are June, August and September (29.92").

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Average wind speed in June
Guerneville, CA

Average wind speed in June - Guerneville, CA
  • Average wind speed in June: 6.9mph

The windiest month (with the highest average wind speed) is May (7.2mph).
The calmest month (with the lowest average wind speed) is November (5mph).

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Average humidity in June
Guerneville, CA

Average humidity in June - Guerneville, CA
  • Average humidity in June: 64%

The month with the highest relative humidity is March (77%).
The month with the lowest relative humidity is September (62%).

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Average rainfall in June
Guerneville, CA

Average rainfall in June - Guerneville, CA
  • Average rainfall in June: 0.12"

The wettest month (with the highest rainfall) is February (3.27").
The driest months (with the least rainfall) are July and August (0.04").

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Average rainfall days in June
Guerneville, CA

Average rainfall days in June - Guerneville, CA
  • Average rainfall days in June: 1.8 days

The month with the highest number of rainy days is March (10.3 days).
The month with the least rainy days is August (0.9 days).

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

Average daylight in June / Average sunshine in June - Guerneville, CA
  • Average daylight in June: 14.8h

The month with the longest days is June (Average daylight: 14.8h).
The month with the shortest days is December (Average daylight: 9.5h).

  • Average sunshine in June: 11.4h

The month with the most sunshine is July (Average sunshine: 11.8h).
The month with the least sunshine is December (Average sunshine: 5.4h).

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Average sunshine days in June
Guerneville, CA

Average sunshine days in June - Guerneville, CA
  • Average sunshine days in June: 27.3 days

The month with the most sunshine days is July (28.9 days).
The month with the least sunshine days is February (19.9 days).

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Average UV index in June
Guerneville, CA

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

Months with the highest UV index are June, July and August (UV index 6).
Months with the lowest UV index are January, February, November and December (UV index 3).

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Average cloud cover in June
Guerneville, CA

Average cloud cover in June - Guerneville, CA
  • Average cloud cover in June: 17

The month with the most cloud cover is March (Cloud cover 42).
The month with the least cloud cover is July (Cloud cover 11).

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Average visibility in June
Guerneville, CA

Average visibility in June - Guerneville, 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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