July weather forecastWalnut, CA
July
Weather in July
July in Walnut, California, is a tropical summer month, with an average temperature ranging between max 87.8°F (31°C) and min 64.6°F (18.1°C).Temperature
July's arrival coincides with a marginal rise in the average high-temperature, moving from June's moderately hot 81.7°F (27.6°C) to a tropical 87.8°F (31°C). Despite a noticeable differential from daytime highs, Walnut notes an average nighttime low-temperature of 64.6°F (18.1°C) in July.Heat index
The heat index for July is calculated to be a tropical 91.4°F (33°C). Take more preventive steps, risk of heat exhaustion and heat cramps is elevated. Long activity may culminate in heatstroke.Note that heat index values are valued for light wind and location in the shade. Heat index values may surge by up to 15 Fahrenheit (8 Celsius) degrees in the presence of direct sunlight.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. Elements such as metabolic variations, pregnancy, and physical exertion can influence one's weather perception. With the sun shining directly, it's crucial to understand that it can increase the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for children. Kids frequently ignore the importance of taking a break and rehydrating. Thirst is a late symptom of dehydration - thus, it is crucial to stay hydrated, especially during long-lasting physical activities.
Humidity
In Walnut, California, the average relative humidity in July is 50%.Rainfall
In July, the rain falls for 2.4 days. Throughout July, 0.12" (3mm) of precipitation is accumulated. Throughout the year, there are 43.1 rainfall days, and 6.89" (175mm) of precipitation is accumulated.Daylight
In Walnut, the average length of the day in July is 14h and 10min.On the first day of the month, sunrise is at 5:44 am and sunset at 8:06 pm. On the last day of July, sunrise is at 6:02 am and sunset at 7:52 pm PDT.
Sunshine
The month with the most sunshine is July, with an average of 12.1h of sunshine.UV index
The months with the highest UV index are July and August, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high health risk from exposure to the Sun's UV rays for the ordinary person.Note: The daily high UV index of 7 during July translates into the following recommendations:
Evade overexposure. Individuals with fair skin risk burning in under 20 minutes. Avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is most intense, and remember that not all shade structures provide full protection. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in July
Walnut, CA
- Average high temperature in July: 87.8°F
The warmest month (with the highest average high temperature) is August (89.2°F).
The month with the lowest average high temperature is December (63.7°F).
- Average low temperature in July: 64.6°F
The month with the highest average low temperature is August (66.2°F).
The coldest months (with the lowest average low temperature) are February and December (47.7°F).
Average pressure in July
Walnut, CA
- Average pressure in July: 29.9"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed in July
Walnut, CA
- Average wind speed in July: 5mph
The windiest months (with the highest average wind speed) are April and May (5.7mph).
The calmest month (with the lowest average wind speed) is September (4.5mph).
Average humidity in July
Walnut, CA
- Average humidity in July: 50%
The months with the highest relative humidity are May and June (56%).
The month with the lowest relative humidity is November (45%).
Average rainfall in July
Walnut, CA
- Average rainfall in July: 0.12"
The wettest month (with the highest rainfall) is December (1.57").
The driest months (with the least rainfall) are June and August (0.04").
Average rainfall days in July
Walnut, CA
- Average rainfall days in July: 2.4 days
The month with the highest number of rainy days is March (6.6 days).
The month with the least rainy days is June (1 days).
Average daylight in July /
Average sunshine in July
Walnut, 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 6min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is February (Average sunshine: 6h and 48min).
Average sunshine days in July
Walnut, CA
- Average sunshine days in July: 27 days
The month with the most sunshine days is June (28.6 days).
The month with the least sunshine days is February (22 days).
Average UV index in July
Walnut, CA
- Average UV index in July: 7
The months with the highest UV index are July and August (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 4).
Average cloud cover in July
Walnut, CA
- Average cloud cover in July: 6
The months with the most cloud cover are February, March and December (Cloud cover 21).
The month with the least cloud cover is August (Cloud cover 5).
Average visibility in July
Walnut, 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).
