June weather forecast
Rio Vista, CA

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Weather in June

The first month of the summer, June, is a tropical month in Rio Vista, California, with an average temperature fluctuating between 86.5°F (30.3°C) and 55.8°F (13.2°C).

Temperature

The rise of average high-temperatures is seen in June, with an increase from a warm 76.6°F (24.8°C) in May to a hot 86.5°F (30.3°C). In June, the temperature in Rio Vista sees a substantial plunge from daytime highs to a low average of 55.8°F (13.2°C).

Heat index

The heat index in June is estimated at a hot 89.6°F (32°C). Constant exposure and activity lead to possible fatigue. Prolonged exercise may result in heat cramps.
The metrics for the heat index are tailored for both shady environments and light winds. Heat index values might soar by up to 15 Fahrenheit (8 Celsius) degrees with exposure to direct sunshine.
Note: The heat index, also known as 'apparent temperature' or 'real feel', gauges the sensation of temperature factoring in the air's moisture content. Additional elements encompassing metabolic differences, the degree of physical activity, and attire can impact the individual's perception of temperature. It is noteworthy that being in direct sunlight can enhance the weather's impact, raising the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical to babies and toddlers. Children often fail to understand the importance of rest and rehydration. Thirst is a late manifestation of dehydration - hence, it is crucial to stay hydrated, especially during ongoing physical activities.

Humidity

The average relative humidity in June is 51%.

Rainfall

In Rio Vista, in June, it is raining for 1.5 days, with typically 0.08" (2mm) of accumulated precipitation. In Rio Vista, during the entire year, the rain falls for 68.7 days and collects up to 11.18" (284mm) of precipitation.

Daylight

The month with the longest days is June, with an average of 14h and 48min of daylight.
On the first day of June, sunrise is at 5:45 am and sunset at 8:24 pm. On the last day of the month, sunrise is at 5:47 am and sunset at 8:33 pm PDT.

Sunshine

In June, the average sunshine is 11.8h.

UV index

June through August, with an average maximum UV index of 6, are months with the highest UV index. A UV Index value of 6 to 7 symbolizes a high health hazard from unsafe exposure to UV radiation for the average person.
Note: The maximum daily UV index of 6 in June converts into the following recommendations:
Escape overexposure. People with light skin may incur burns in fewer than 20 minutes. Try to minimize direct Sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Also note that objects like parasols or canopies might not provide complete sun protection. Boost your sun resistance with garments that are densely woven yet spacious.
Updated: Aug 20, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How hot is it in June?

June temperatures vary between a high-temperature of 86.5°F (30.3°C) and a low-temperature of 55.8°F (13.2°C). The average heat index (a.k.a. 'feels like', 'real feel'), which calculates the temperature value influenced by the moisture in the air, in June is estimated at 89.6°F (32°C).

What is the average humidity in June?

The average relative humidity in June is 51%.

How many days does it rain in June in Rio Vista?

In Rio Vista, during June, the rain falls for 1.5 days and regularly aggregates up to 0.08" (2mm) of precipitation.

When are the longest days?

June has the longest days of the year, with an average of 14h and 48min of daylight.

What is the average length of the day in June?

In June, the average day length is 14h and 47min.

When is the sunrise / sunset in June?

On the first day of June, sunrise is at 5:45 am and sunset at 8:24 pm. On the last day of the month, sunrise is at 5:47 am and sunset at 8:33 pm PDT.

How long on average sun shines in June?

The average sunshine duration in June is 11.8h.

When is the highest UV index?

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

How high is the UV index in June?

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

Average temperature in June
Rio Vista, CA

Average temperature in June - Rio Vista, CA
  • Average high temperature in June: 86.5°F

The warmest month (with the highest average high temperature) is July (91°F).
The month with the lowest average high temperature is December (55°F).

  • Average low temperature in June: 55.8°F

The month with the highest average low temperature is September (58.1°F).
The coldest month (with the lowest average low temperature) is January (41.5°F).

Average pressure in June
Rio Vista, CA

Average pressure in June - Rio Vista, CA
  • Average pressure in June: 29.91"Hg

The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

Average wind speed in June
Rio Vista, CA

Average wind speed in June - Rio Vista, CA
  • Average wind speed in June: 7.6mph

The windiest month (with the highest average wind speed) is June (7.6mph).
The calmest month (with the lowest average wind speed) is November (4.7mph).

Average humidity in June
Rio Vista, CA

Average humidity in June - Rio Vista, CA
  • Average humidity in June: 51%

The months with the highest relative humidity are January and March (74%).
The month with the lowest relative humidity is September (49%).

Average rainfall in June
Rio Vista, CA

Average rainfall in June - Rio Vista, CA
  • Average rainfall in June: 0.08"

The wettest month (with the highest rainfall) is February (2.17").
The driest month (with the least rainfall) is August (0").

Average rainfall days in June
Rio Vista, CA

Average rainfall days in June - Rio Vista, CA
  • Average rainfall days in June: 1.5 days

The month with the highest number of rainy days is March (13 days).
The month with the least rainy days is August (0.7 days).

Average daylight in June /
Average sunshine in June
Rio Vista, CA

Average daylight in June / Average sunshine in June - Rio Vista, CA
  • Average daylight in June: 14h and 5min

The month with the longest days is June (Average daylight: 14h and 48min).
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 6min).
The month with the least sunshine is December (Average sunshine: 5h and 54min).

Average sunshine days in June
Rio Vista, CA

Average sunshine days in June - Rio Vista, CA
  • Average sunshine days in June: 28.1 days

The month with the most sunshine days is August (29.9 days).
The month with the least sunshine days is March (17.3 days).

Average UV index in June
Rio Vista, CA

Average UV index in June - Rio Vista, CA
  • Average UV index in June: 6

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

Average cloud cover in June
Rio Vista, CA

Average cloud cover in June - Rio Vista, CA
  • Average cloud cover in June: 10

The months with the most cloud cover are March and December (Cloud cover 35).
The month with the least cloud cover is July (Cloud cover 4).

Average visibility in June
Rio Vista, CA

Average visibility in June - Rio Vista, 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).

Rio Vista, California, USA

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