June weather forecastRancho Cucamonga, CA
June
Weather in June
June, the first month of the summer in Rancho Cucamonga, is still a warm month, with an average temperature fluctuating between 84.7°F (29.3°C) and 58.6°F (14.8°C).Temperature
June witnesses a subtle temperature ascent, adjusting from 76.6°F (24.8°C) in May to a still warm 84.7°F (29.3°C). Rancho Cucamonga records a marked divergence from the day's high temperatures, with nights in June averaging at a moderate 58.6°F (14.8°C).Heat index
In June, the average heat index is appraised at a tropical 86°F (30°C). With ongoing exposure and activity, one might experience weariness, and heat cramps could ensue.When considering the heat index, it's pivotal to note it is for shade and mild wind conditions. The direct sunshine could escalate the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', joins air temperature with relative humidity to produce a temperature perception for humans. Factors such as metabolic variation, pregnancy, and physical activity play a role in one's impression of weather. Consider the sun's direct rays and their impact; they can potentially increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are essentially critical for children. In general, children are more at risk than adults because they sweat less. Furthermore, the large skin surface compared to their small bodies and the high heat production due to their actions contribute to this vulnerability.
Humidity
In Rancho Cucamonga, the average relative humidity in June is 50%.Rainfall
June is the month with the least rainfall. Rain falls for 0.9 days and accumulates 0.04" (1mm) of precipitation.Snowfall
January, March through December are months without snowfall.Daylight
The month with the longest days is June, with an average of 14h and 24min of daylight.On the first day of the month, sunrise is at 5:39 am and sunset at 7:57 pm. On the last day of June, sunrise is at 5:42 am and sunset at 8:06 pm PDT.
Sunshine
In June, the average sunshine is 12h.UV index
In Rancho Cucamonga, the average daily maximum UV index in June is 6. A UV Index estimate of 6 to 7 represents a high threat to health from unprotected exposure to Sun's UV rays for average individuals.Note: The maximum daily UV index, 6 in June, converts into the following recommendations:
Adhere to precautions and respect sun safety doctrines. Avoiding sunburn is vital. UV radiation from the sun is at its strongest between 10 a.m. and 4 p.m. Try to limit direct exposure during these hours. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in June
Rancho Cucamonga, CA
- Average high temperature in June: 84.7°F
The warmest month (with the highest average high temperature) is August (91.8°F).
The month with the lowest average high temperature is December (61.7°F).
- Average low temperature in June: 58.6°F
The month with the highest average low temperature is August (66.6°F).
The coldest months (with the lowest average low temperature) are February and December (45.3°F).
Average pressure in June
Rancho Cucamonga, CA
- Average pressure in June: 29.86"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).
Average wind speed in June
Rancho Cucamonga, CA
- Average wind speed in June: 5.5mph
The windiest month (with the highest average wind speed) is May (5.9mph).
The calmest month (with the lowest average wind speed) is September (4.5mph).
Average humidity in June
Rancho Cucamonga, CA
- Average humidity in June: 50%
The months with the highest relative humidity are February, March and May (53%).
The month with the lowest relative humidity is August (41%).
Average rainfall in June
Rancho Cucamonga, CA
- Average rainfall in June: 0.04"
The wettest month (with the highest rainfall) is February (0.98").
The driest month (with the least rainfall) is June (0.04").
Average rainfall days in June
Rancho Cucamonga, CA
- Average rainfall days in June: 0.9 days
The month with the highest number of rainy days is March (6.3 days).
The month with the least rainy days is June (0.9 days).
Average snowfall days in June
Rancho Cucamonga, CA
- Average snowfall days in June: 0 days
The month with the highest number of snowfall days is February (0.1 days).
The months with the least snowfall days are January, March, April, May, June, July, August, September, October, November and December (0 days).
Average daylight in June /
Average sunshine in June
Rancho Cucamonga, 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 0min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The months with the least sunshine are February and December (Average sunshine: 6h and 54min).
Average sunshine days in June
Rancho Cucamonga, CA
- Average sunshine days in June: 28.3 days
The month with the most sunshine days is June (28.3 days).
The month with the least sunshine days is February (22.8 days).
Average UV index in June
Rancho Cucamonga, CA
- Average UV index in June: 6
The months with the highest UV index are July and August (UV index 7).
The month with the lowest UV index is December (UV index 3).
Average cloud cover in June
Rancho Cucamonga, CA
- Average cloud cover in June: 7
The months with the most cloud cover are February and December (Cloud cover 21).
The month with the least cloud cover is August (Cloud cover 5).
Average visibility in June
Rancho Cucamonga, 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).
