June weather forecastCastro Valley, CA
June
Weather in June
June, the first month of the summer in Castro Valley, is a moderately hot month, with an average temperature fluctuating between 53.6°F (12°C) and 77°F (25°C).Temperature
As May gives way to June, the average high-temperature displays a slight ascent, adjusting from a pleasant 70.3°F (21.3°C) to a moderately hot 77°F (25°C). Castro Valley documents a significant temperature variance in June, with the mean nighttime lows settling at a cool 53.6°F (12°C).Humidity
In Castro Valley, the average relative humidity in June is 63%.Rainfall
In June, in Castro Valley, the rain falls for 1.6 days. Throughout June, 0.12" (3mm) of precipitation is accumulated. Throughout the year, in Castro Valley, there are 69.2 rainfall days, and 11.1" (282mm) of precipitation is accumulated.Daylight
June has the longest days of the year in Castro Valley, with an average of 14h and 42min of daylight.On the first day of the month, sunrise is at 5:47 am and sunset at 8:24 pm. On the last day of June, sunrise is at 5:50 am and sunset at 8:34 pm PDT.
Sunshine
In Castro Valley, the average sunshine in June is 11.8h.UV index
The month with the highest UV index is June, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV radiation for average individuals.Note: A daily maximum UV index of 6 in June translates into the following instructions:
Endorse precautions and be consistent with sun safety guidelines. Preventing sunburn is paramount. The Sun's UV radiation is most potent between 10 a.m. and 4 p.m. Try to limit direct exposure to the Sun during this period. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in June
Castro Valley, CA
- Average high temperature in June: 77°F
The warmest month (with the highest average high temperature) is July (80.2°F).
The month with the lowest average high temperature is December (55.9°F).
- Average low temperature in June: 53.6°F
The month with the highest average low temperature is August (56.5°F).
The coldest months (with the lowest average low temperature) are January and December (43.7°F).
Average pressure in June
Castro Valley, CA
- Average pressure in June: 29.92"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.92"Hg).
Average wind speed in June
Castro Valley, CA
- Average wind speed in June: 6.3mph
The windiest month (with the highest average wind speed) is May (6.6mph).
The calmest month (with the lowest average wind speed) is November (4.6mph).
Average humidity in June
Castro Valley, CA
- Average humidity in June: 63%
The month with the highest relative humidity is March (74%).
The month with the lowest relative humidity is September (61%).
Average rainfall in June
Castro Valley, CA
- Average rainfall in June: 0.12"
The wettest month (with the highest rainfall) is February (2.28").
The driest months (with the least rainfall) are July and August (0.04").
Average rainfall days in June
Castro Valley, CA
- Average rainfall days in June: 1.6 days
The month with the highest number of rainy days is March (12.4 days).
The month with the least rainy days is August (0.9 days).
Average daylight in June /
Average sunshine in June
Castro Valley, CA
- Average daylight in June: 14h and 42min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in June: 11h and 48min
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
Castro Valley, CA
- Average sunshine days in June: 27.3 days
The month with the most sunshine days is August (28.9 days).
The month with the least sunshine days is March (17.3 days).
Average UV index in June
Castro Valley, 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
Castro Valley, CA
- Average cloud cover in June: 12
The months with the most cloud cover are March and December (Cloud cover 34).
The month with the least cloud cover is July (Cloud cover 7).
Average visibility in June
Castro Valley, 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).
