Contents
- Weather in August
- Frequently asked questions
- Average temperature in August
- Average pressure in August
- Average wind speed in August
- Average humidity in August
- Average rainfall in August
- Average rainfall days in August
- Average daylight in August
- Average sunshine in August
- Average sunshine days in August
- Average UV index in August
- Average cloud cover in August
- Average visibility in August
Weather in August
Temperature
In Walnut, August is identified by the highest average temperatures, reaching a peak of 89.2°F (31.8°C) and a low of 66.2°F (19°C).Heat index
In August, the heat index is computed to be a hot 91.4°F (33°C). Ensure extra safety measures, heat exhaustion and heat cramps are likely. Continuous activity might result in heatstroke.When assessing, remember that heat index measurements are for light winds and shaded spots. Direct sunshine exposure could raise heat index values by as much as 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', provides an understanding of perceived warmth by combining temperature and relative humidity. The effect is experienced differently by individuals, hinging on unique characteristics such as body mass, stature, and level of activity. Consider that direct sun exposure can intensify the felt heat, adding potentially 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are highly critical for babies and toddlers. Children often overlook the need for breaks and fluid intake. Thirst is a late-stage sign of dehydration - hence, it is necessary to stay hydrated, especially during extended periods of physical activities.
Humidity
The average relative humidity in August is 47%.Rainfall
The months with the least rainfall in Walnut are June and August Rain falls for 1.4 days and accumulates 0.04" (1mm) of rain.Daylight
The average length of the day in August is 13h and 23min.On the first day of the month, sunrise is at 6:03 am and sunset at 7:52 pm. On the last day of August, sunrise is at 6:24 am and sunset at 7:18 pm PDT.
Sunshine
The average sunshine in August in Walnut, California, is 12h.UV index
The months with the highest UV index in Walnut are July and August, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV radiation for average individuals.Note: An average maximum UV index of 7 in August leads to these recommendations:
Guard against overexposure. Protection from sun-induced harm is essential. Limit your direct sun exposure, especially between 10 a.m. and 4 p.m., when UV radiation is strongest. Shade structures might not provide complete sun protection. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection.
Frequently asked questions
What month is the hottest in Walnut?
How hot is August in Walnut?
What is the average humidity in August in Walnut?
What is the driest month in Walnut?
How many days does it rain in August in Walnut?
What is the average length of the day in August in Walnut?
When are sunrise and sunset in August in Walnut?
How long on average sun shines in August in Walnut?
What is the month with the highest UV index in Walnut?
How high is the UV index in August in Walnut?
Average temperature in August
Walnut, CA
- Average high temperature in August: 89.2°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 August: 66.2°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 August
Walnut, CA
- Average pressure in August: 29.89"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 August
Walnut, CA
- Average wind speed in August: 4.7mph
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 August
Walnut, CA
- Average humidity in August: 47%
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 August
Walnut, CA
- Average rainfall in August: 0.04"
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 August
Walnut, CA
- Average rainfall days in August: 1.4 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 August /
Average sunshine in August
Walnut, CA
- Average daylight in August: 13h and 2min
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 August: 12h and 0min
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 August
Walnut, CA
- Average sunshine days in August: 28 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 August
Walnut, CA
- Average UV index in August: 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 August
Walnut, CA
- Average cloud cover in August: 5
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 August
Walnut, CA
- Average visibility in August: 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).
Walnut, California, USA
Weather forecast for your location
2. Allow the app to use your location
