June weather forecastCastaic, CA
June
Weather in June
The first month of the summer, June, is still a warm month in Castaic, California, with an average temperature ranging between max 81.7°F (27.6°C) and min 57.2°F (14°C).Temperature
Castaic's transition into June is noticed by a slight rise in the average high-temperature, advancing from a warm 73.9°F (23.3°C) in May to a still moderately hot 81.7°F (27.6°C). Castaic witnesses a consistent, sharp contrast from the daytime highs, with an average low-temperature of 57.2°F (14°C) throughout June.Heat index
June's mean heat index is evaluated at 82.4°F (28°C). With constant exposure and activity, a state of weariness might ensue, leading to potential heat cramps.It is important to note that the heat index values are for shaded areas and light wind scenarios. Under direct sunshine, the heat index values might be elevated by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is a value derived by merging air temperature with the humidity to convey how the climate feels. Additional elements including metabolic differences, the level of physical activity, and attire have a role in shaping the individual's temperature perception. Direct exposure to sun rays can potentially augment the heat sensation, elevating the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Youngsters frequently overlook the need for breaks and fluid intake. Thirst is an advanced sign of dehydration - thereby highlighting the importance of keeping hydrated, particularly during long physical activities.
Humidity
In Castaic, the average relative humidity in June is 51%.Rainfall
June and August are months with the least rain when the rain falls for 0.7 days and typically aggregates up to 0.04" (1mm) of rain.Daylight
With an average of 14h and 24min of daylight, June has the longest days of the year.On the first day of June, sunrise is at 5:42 am and sunset at 8:02 pm. On the last day of the month, sunrise is at 5:45 am and sunset at 8:11 pm PDT.
Sunshine
June and July, with an average of 12.1h of sunshine, are months with the most sunshine.UV index
The months with the highest UV index are June through August, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high health risk from unprotected exposure to Sun's UV rays for the ordinary person.Note: In June, a daily maximum UV index of 6 leads to the following instructions:
Implement preventive steps and embrace sun safety standards. Protection from skin and eye distress is compulsory. The Sun's UV radiation is most potent between the hours of 10 a.m. and 4 p.m. Try to avoid direct sunlight during this time. Boost your sun resistance with garments that are densely woven yet spacious.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in June
Castaic, CA
- Average high temperature in June: 81.7°F
The warmest month (with the highest average high temperature) is August (88.2°F).
The month with the lowest average high temperature is December (59.5°F).
- Average low temperature in June: 57.2°F
The month with the highest average low temperature is August (63.7°F).
The coldest month (with the lowest average low temperature) is December (42.3°F).
Average pressure in June
Castaic, CA
- Average pressure in June: 29.88"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in June
Castaic, CA
- Average wind speed in June: 5.5mph
The windiest months (with the highest average wind speed) are January and December (7.3mph).
The calmest month (with the lowest average wind speed) is August (4.9mph).
Average humidity in June
Castaic, CA
- Average humidity in June: 51%
The month with the highest relative humidity is March (56%).
The months with the lowest relative humidity are August and October (43%).
Average rainfall in June
Castaic, CA
- Average rainfall in June: 0.04"
The wettest month (with the highest rainfall) is December (1.42").
The driest months (with the least rainfall) are June and August (0.04").
Average rainfall days in June
Castaic, CA
- Average rainfall days in June: 0.7 days
The month with the highest number of rainy days is March (6.9 days).
The month with the least rainy days is June (0.7 days).
Average daylight in June /
Average sunshine in June
Castaic, CA
- Average daylight in June: 14h and 24min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in June: 12h and 6min
The months with the most sunshine are June and July (Average sunshine: 12h and 6min).
The month with the least sunshine is February (Average sunshine: 6h and 42min).
Average sunshine days in June
Castaic, CA
- Average sunshine days in June: 28.1 days
The month with the most sunshine days is August (28.7 days).
The month with the least sunshine days is February (21.5 days).
Average UV index in June
Castaic, 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 February, November and December (UV index 3).
Average cloud cover in June
Castaic, CA
- Average cloud cover in June: 7
The month with the most cloud cover is March (Cloud cover 23).
The month with the least cloud cover is August (Cloud cover 4).
Average visibility in June
Castaic, 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).





