June weather forecastHercules, CA
June
Weather in June
The first month of the summer, June, is a warm month in Hercules, California, with temperature in the range of an average low of 54.3°F (12.4°C) and an average high of 74.8°F (23.8°C).Temperature
The coming of June brings a minor shift in Hercules's weather, with average high-temperatures adjusting from May's agreeable 69.3°F (20.7°C) to a moderately hot 74.8°F (23.8°C). During June, an average low-temperature of 54.3°F (12.4°C) is observed in Hercules.Humidity
The average relative humidity in June in Hercules is 65%.Rainfall
In June, in Hercules, the rain falls for 2 days. Throughout June, 0.16" (4mm) of precipitation is accumulated. Throughout the year, there are 72.2 rainfall days, and 12.83" (326mm) of precipitation is accumulated.Ocean temperature
In June, the average ocean temperature in Hercules is 52.9°F (11.6°C).Note: With the appropriate swimsuit, one can swim in 52.9°F (11.6°C) even if temperatures dip below 50°F (10°C); otherwise, be ready for cold shock and breath issues. A fleeting swim around 55.4°F (13°C) is distressing.
Daylight
June has the longest days of the year in Hercules, with an average of 14h and 48min of daylight.On the first day of the month, sunrise is at 5:47 am and sunset at 8:26 pm. On the last day of June, in Hercules, sunrise is at 5:50 am and sunset at 8:35 pm PDT.
Sunshine
The average sunshine in June is 11.6h.UV index
The months with the highest UV index in Hercules are April through September, with an average maximum UV index of 5. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV radiation for ordinary individuals.Note: In June, the UV index of 5 transforms into the following advice:
Take precautions - Protection against sunburn is recommended. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in June
Hercules, CA
- Average high temperature in June: 74.8°F
The warmest month (with the highest average high temperature) is September (77.5°F).
The month with the lowest average high temperature is December (55.4°F).
- Average low temperature in June: 54.3°F
The month with the highest average low temperature is August (56.8°F).
The coldest months (with the lowest average low temperature) are January and December (43.9°F).
Average pressure in June
Hercules, CA
- Average pressure in June: 29.92"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.92"Hg).
Average wind speed in June
Hercules, CA
- Average wind speed in June: 7.2mph
The windiest month (with the highest average wind speed) is May (7.5mph).
The calmest month (with the lowest average wind speed) is November (4.8mph).
Average humidity in June
Hercules, CA
- Average humidity in June: 65%
The month with the highest relative humidity is March (74%).
The months with the lowest relative humidity are September and October (63%).
Average rainfall in June
Hercules, CA
- Average rainfall in June: 0.16"
The wettest month (with the highest rainfall) is February (2.76").
The driest months (with the least rainfall) are July and August (0.04").
Average rainfall days in June
Hercules, CA
- Average rainfall days in June: 2 days
The month with the highest number of rainy days is March (12.6 days).
The month with the least rainy days is August (1.1 days).
Average sea temperature in June
Hercules, CA
- Average sea temperature in June: 52.9°F
The best month for swimming (with the highest average sea temperature) is September (57°F).
The coldest month (with the lowest average sea temperature) is April (52.6°F).
Average daylight in June /
Average sunshine in June
Hercules, CA
- Average daylight in June: 14h and 48min
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 36min
The month with the most sunshine is July (Average sunshine: 11h and 54min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).
Average sunshine days in June
Hercules, CA
- Average sunshine days in June: 25.8 days
The month with the most sunshine days is August (27.3 days).
The month with the least sunshine days is March (16.4 days).
Average UV index in June
Hercules, CA
- Average UV index in June: 5
The months with the highest UV index are April, May, June, July, August and September (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in June
Hercules, CA
- Average cloud cover in June: 15
The month with the most cloud cover is March (Cloud cover 37).
The month with the least cloud cover is July (Cloud cover 12).
Average visibility in June
Hercules, 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).
