July weather forecastSan Bernardino, CA
July
Weather in July
July in San Bernardino, California, is a tropical summer month, with an average temperature fluctuating between 91°F (32.8°C) and 64.9°F (18.3°C).Temperature
July witnesses a minor rise in the average high-temperature, transitioning from a moderately hot 85.1°F (29.5°C) in June to a tropical 91°F (32.8°C). Throughout July nights, a significant departure from daytime temperatures, with an average low of 64.9°F (18.3°C), is recognized.Heat index
July's mean heat index is computed to be a tropical 93.2°F (34°C). Adopt enhanced safety measures, heat exhaustion and heat cramps could occur. Continuous activity may induce heatstroke.Note that heat index values are valued for light wind and location in the shade. Direct sunlight might lead to a heat index increase by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', is a measure of how hot it feels when the actual air humidity is factored in. A person's impression of weather can be shaped by many aspects, among them metabolic variations, pregnancy, and levels of physical activity. In the direct sunlight, the weather's impact can be amplified, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to babies and toddlers. Young individuals usually face more risks than adults due to their lower sweat production. Their large skin surface area relative to their tiny bodies and high heat production from their activities adds to their risk.
Humidity
In July, the average relative humidity in San Bernardino, California, is 41%.Rainfall
In San Bernardino, in July, during 3.1 rainfall days, 0.2" (5mm) of precipitation is typically accumulated. In San Bernardino, California, during the entire year, the rain falls for 46.6 days and collects up to 6.18" (157mm) of precipitation.Snowfall
January, March through December are months without snowfall.Daylight
In July, the average length of the day in San Bernardino is 14h and 10min.On the first day of July in San Bernardino, sunrise is at 5:41 am and sunset at 8:04 pm. On the last day of the month, sunrise is at 6:00 am and sunset at 7:50 pm PDT.
Sunshine
With an average of 12.2h of sunshine, July has the most sunshine of the year in San Bernardino.UV index
June through August, with an average maximum UV index of 7, are months with the highest UV index in San Bernardino. A UV Index value of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV radiation for the average person.Note: In July, the maximum UV index of 7 suggests this advice:
Skirt overexposure. People with light complexions might get scorched in under 20 minutes. Be aware that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. and try to reduce direct sun exposure during this period as much as possible. Experience reduced UV exposure by about half when donning a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in July
San Bernardino, CA
- Average high temperature in July: 91°F
The warmest month (with the highest average high temperature) is August (91.9°F).
The month with the lowest average high temperature is December (59.9°F).
- Average low temperature in July: 64.9°F
The month with the highest average low temperature is August (65.8°F).
The coldest month (with the lowest average low temperature) is February (43.5°F).
Average pressure in July
San Bernardino, CA
- Average pressure in July: 29.88"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed in July
San Bernardino, CA
- Average wind speed in July: 5.1mph
The windiest months (with the highest average wind speed) are April and May (6mph).
The calmest month (with the lowest average wind speed) is September (4.5mph).
Average humidity in July
San Bernardino, CA
- Average humidity in July: 41%
The month with the highest relative humidity is February (53%).
The month with the lowest relative humidity is August (38%).
Average rainfall in July
San Bernardino, CA
- Average rainfall in July: 0.2"
The wettest month (with the highest rainfall) is December (1.42").
The driest month (with the least rainfall) is June (0.04").
Average rainfall days in July
San Bernardino, CA
- Average rainfall days in July: 3.1 days
The month with the highest number of rainy days is March (6.7 days).
The month with the least rainy days is June (1.2 days).
Average snowfall days in July
San Bernardino, CA
- Average snowfall days in July: 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 July /
Average sunshine in July
San Bernardino, CA
- Average daylight in July: 14h and 12min
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 July: 12h and 12min
The month with the most sunshine is July (Average sunshine: 12h and 12min).
The month with the least sunshine is December (Average sunshine: 6h and 54min).
Average sunshine days in July
San Bernardino, CA
- Average sunshine days in July: 25.8 days
The months with the most sunshine days are June and October (27.9 days).
The month with the least sunshine days is February (21.7 days).
Average UV index in July
San Bernardino, CA
- Average UV index in July: 7
The months with the highest UV index are June, July and August (UV index 7).
The month with the lowest UV index is December (UV index 3).
Average cloud cover in July
San Bernardino, CA
- Average cloud cover in July: 6
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 July
San Bernardino, CA
- Average visibility in July: 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).
