Contents
- Weather in June
- Frequently asked questions
- Average temperature in June
- Average pressure in June
- Average wind speed in June
- Average humidity in June
- Average rainfall in June
- Average rainfall days in June
- Average daylight in June
- Average sunshine in June
- Average sunshine days in June
- Average UV index in June
- Average cloud cover in June
- Average visibility in June
Weather in June
Temperature
June's onset brings a subtle temperature rise, moving from an agreeable 71.1°F (21.7°C) in May to a warm 77.7°F (25.4°C). During June, Port Costa reports a marked contrast from daily peak temperatures, with an average nighttime reading of 54.1°F (12.3°C).Humidity
In June, the average relative humidity is 62%.Rainfall
In Port Costa, in June, it is raining for 1.1 days, with typically 0.08" (2mm) of accumulated precipitation. In Port Costa, during the entire year, the rain falls for 56.9 days and collects up to 4.88" (124mm) of precipitation.Daylight
With an average of 14h and 48min of daylight, June has the longest days of the year in Port Costa.On the first day of June, sunrise is at 5:47 am and sunset at 8:26 pm. On the last day of the month, sunrise is at 5:49 am and sunset at 8:35 pm PDT.
Sunshine
In June, the average sunshine is 11.7h.UV index
With an average maximum UV index of 6, June is the month with the highest UV index. A UV Index estimate of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV rays for the average person.Note: The UV index of 6 during June translates into the following guidance:
Exercise precautions and adapt sun safety practices. Defence against skin and eye affliction is paramount. Seek shade and limit direct Sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its peak, but be aware that not all shade structures provide complete sun protection. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in June?
What is the average humidity in June?
How much does it rain in June?
When are the longest days?
What is the average length of the day in June?
When is the sunrise / sunset in June?
How long on average sun shines in June?
When is the highest UV index?
How high is the UV index in June?
Average temperature in June
Port Costa, CA
- Average high temperature in June: 77.7°F
The warmest months (with the highest average high temperature) are July and September (80.1°F).
The month with the lowest average high temperature is December (55.4°F).
- Average low temperature in June: 54.1°F
The month with the highest average low temperature is August (56.5°F).
The coldest month (with the lowest average low temperature) is January (43°F).
Average pressure in June
Port Costa, 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
Port Costa, CA
- Average wind speed in June: 6.9mph
The windiest month (with the highest average wind speed) is May (7.1mph).
The calmest month (with the lowest average wind speed) is November (4.6mph).
Average humidity in June
Port Costa, CA
- Average humidity in June: 62%
The month with the highest relative humidity is March (75%).
The months with the lowest relative humidity are September and October (60%).
Average rainfall in June
Port Costa, CA
- Average rainfall in June: 0.08"
The wettest month (with the highest rainfall) is February (1.14").
The driest months (with the least rainfall) are July and August (0.04").
Average rainfall days in June
Port Costa, CA
- Average rainfall days in June: 1.1 days
The month with the highest number of rainy days is March (10.2 days).
The month with the least rainy days is August (0.9 days).
Average daylight in June /
Average sunshine in June
Port Costa, 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 4min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).
Average sunshine days in June
Port Costa, CA
- Average sunshine days in June: 26.7 days
The month with the most sunshine days is July (27.2 days).
The month with the least sunshine days is March (18.8 days).
Average UV index in June
Port Costa, CA
- Average UV index in June: 6
The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in June
Port Costa, CA
- Average cloud cover in June: 14
The month with the most cloud cover is March (Cloud cover 37).
The month with the least cloud cover is July (Cloud cover 9).
Average visibility in June
Port Costa, 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).
Port Costa, California, USA
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