August weather forecastArroyo Grande, CA
August
Weather in August
The last month of the summer, August, is another warm month in Arroyo Grande, California, with an average temperature fluctuating between 59.2°F (15.1°C) and 78.8°F (26°C).Temperature
The advent of August sees the average high-temperature at a still warm 78.8°F (26°C), subtly shifted from July's 78.6°F (25.9°C). During August, an average low-temperature of 59.2°F (15.1°C) is observed.Humidity
In Arroyo Grande, the average relative humidity in August is 64%.Rainfall
June and August are months with the least rain in Arroyo Grande when the rain falls for 0.8 days and typically aggregates up to 0.04" (1mm) of rain.Daylight
In Arroyo Grande, the average length of the day in August is 13h and 26min.On the first day of the month, sunrise is at 6:12 am and sunset at 8:05 pm. On the last day of August, in Arroyo Grande, California, sunrise is at 6:34 am and sunset at 7:29 pm PDT.
Sunshine
June through August, with an average of 12h of sunshine, are months with the most sunshine in Arroyo Grande.UV index
June and August, with an average maximum UV index of 6, are months with the highest UV index. A UV Index of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to UV radiation for the average person.Note: In August, a regular UV index of 6 translates into these guidelines:
Avoid overexposure. Fair-skinned individuals can burn in under 20 minutes. 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. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
Arroyo Grande, CA
- Average high temperature in August: 78.8°F
The warmest month (with the highest average high temperature) is September (79.5°F).
The month with the lowest average high temperature is December (61.2°F).
- Average low temperature in August: 59.2°F
The month with the highest average low temperature is September (59.9°F).
The coldest month (with the lowest average low temperature) is February (46°F).
Average pressure in August
Arroyo Grande, CA
- Average pressure in August: 29.91"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.91"Hg).
Average wind speed in August
Arroyo Grande, CA
- Average wind speed in August: 5.7mph
The windiest months (with the highest average wind speed) are April and May (7.3mph).
The calmest month (with the lowest average wind speed) is August (5.7mph).
Average humidity in August
Arroyo Grande, CA
- Average humidity in August: 64%
The month with the highest relative humidity is March (68%).
The month with the lowest relative humidity is October (58%).
Average rainfall in August
Arroyo Grande, CA
- Average rainfall in August: 0.04"
The wettest month (with the highest rainfall) is March (1.61").
The driest months (with the least rainfall) are June and August (0.04").
Average rainfall days in August
Arroyo Grande, CA
- Average rainfall days in August: 0.8 days
The month with the highest number of rainy days is March (8.4 days).
The month with the least rainy days is August (0.8 days).
Average daylight in August /
Average sunshine in August
Arroyo Grande, CA
- Average daylight in August: 13h and 24min
The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 48min).
- Average sunshine in August: 12h and 0min
The months with the most sunshine are June, July and August (Average sunshine: 12h and 0min).
The months with the least sunshine are February and December (Average sunshine: 6h and 30min).
Average sunshine days in August
Arroyo Grande, CA
- Average sunshine days in August: 29.6 days
The month with the most sunshine days is August (29.6 days).
The month with the least sunshine days is February (21 days).
Average UV index in August
Arroyo Grande, CA
- Average UV index in August: 6
The months with the highest UV index are June and August (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 4).
Average cloud cover in August
Arroyo Grande, CA
- Average cloud cover in August: 6
The month with the most cloud cover is March (Cloud cover 27).
The month with the least cloud cover is August (Cloud cover 6).
Average visibility in August
Arroyo Grande, 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).
