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 snowfall in August
- Average snowfall 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
Saint Helena marks the onset of August with an average high-temperature of a still hot 88°F (31.1°C), subtly divergent from July's 88.3°F (31.3°C). A significant drop from the day's peak to an average low-temperature of 54.1°F (12.3°C) is noted during the nights in August.Heat index
The average heat index in August is calculated to be a tropical 93.2°F (34°C). Implement enhanced safety actions, heat cramps and heat exhaustion could occur. Sustained activity might result in heatstroke.It is important to note that the heat index values are for shaded areas and light wind scenarios. A direct sunlight exposure may boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is achieved by amalgamating air temperature with the relative humidity readings. One's perception of weather can be shaped by other factors, involving metabolic differences, pregnancy, and physical exertion. When exposed to direct sunlight, it's possible for the heat index to increase by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. Youngsters generally face more threats than adults given their lesser ability to sweat. Coupled with their larger skin surface relative to their small bodies and higher heat production due to their activities, they are more endangered.
Humidity
The average relative humidity in August is 57%.Rainfall
Months with rainfall in Saint Helena are January through June, August through December. August is the first month it rains. Throughout August, in the average 0.3 rainfall days, it receives 0.04" (1mm) of precipitation. In Saint Helena, during the entire year, the rain falls for 76.2 days and collects up to 16.93" (430mm) of precipitation.Snowfall
In Saint Helena, snow does not fall in January, February, April through December.Daylight
The average length of the day in August is 13h and 37min.On the first day of August, sunrise is at 6:12 am and sunset at 8:19 pm. On the last day of the month, sunrise is at 6:39 am and sunset at 7:40 pm PDT.
Sunshine
In Saint Helena, the average sunshine in August is 11.8h.UV index
The months with the highest UV index are June through August, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high threat to health from unsafe exposure to UV radiation for average individuals.Note: A daily high UV index of 6 in August leads to these guidelines:
Guard against overexposure. Protection from sun-induced harm is essential. Limit direct sun exposure especially between 10 a.m. and 4 p.m., when UV radiation is at its peak. However, keep in mind that shade structures may not provide full sun protection. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage.
Frequently asked questions
How hot does it get in Saint Helena in August?
What is the average humidity in August in Saint Helena?
When does it start to rain in Saint Helena?
When it does not snow in Saint Helena?
How many hours of daylight does Saint Helena have in August?
What time are sunrise and sunset in August in Saint Helena?
How long on average sun shines in August in Saint Helena?
What is the month with the highest UV index in Saint Helena?
What is the UV index reading in August in Saint Helena?
Average temperature in August
Saint Helena, CA
- Average high temperature in August: 88°F
The warmest month (with the highest average high temperature) is July (88.3°F).
The month with the lowest average high temperature is December (54.5°F).
- Average low temperature in August: 54.1°F
The month with the highest average low temperature is September (54.3°F).
The coldest month (with the lowest average low temperature) is December (39.6°F).
Average pressure in August
Saint Helena, CA
- Average pressure in August: 29.91"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.91"Hg).
Average wind speed in August
Saint Helena, CA
- Average wind speed in August: 4.7mph
The windiest month (with the highest average wind speed) is May (5.8mph).
The calmest month (with the lowest average wind speed) is November (4.3mph).
Average humidity in August
Saint Helena, CA
- Average humidity in August: 57%
The month with the highest relative humidity is March (76%).
The month with the lowest relative humidity is September (53%).
Average rainfall in August
Saint Helena, CA
- Average rainfall in August: 0.04"
The wettest month (with the highest rainfall) is February (3.7").
The driest month (with the least rainfall) is July (0").
Average rainfall days in August
Saint Helena, CA
- Average rainfall days in August: 0.3 days
The month with the highest number of rainy days is March (13.5 days).
The month with the least rainy days is August (0.3 days).
Average snowfall in August
Saint Helena, CA
- Average snowfall in August: 0"
The month with the highest snowfall is March (0.04").
The months with the least snowfall are January, February, April, May, June, July, August, September, October, November and December (0").
Average snowfall days in August
Saint Helena, CA
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is March (0.2 days).
The months with the least snowfall days are January, February, April, May, June, July, August, September, October, November and December (0 days).
Average daylight in August /
Average sunshine in August
Saint Helena, CA
- Average daylight in August: 13h and 4min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in August: 11h and 5min
The month with the most sunshine is July (Average sunshine: 11h and 54min).
The month with the least sunshine is December (Average sunshine: 5h and 18min).
Average sunshine days in August
Saint Helena, CA
- Average sunshine days in August: 29.8 days
The month with the most sunshine days is July (30 days).
The month with the least sunshine days is March (15.9 days).
Average UV index in August
Saint Helena, CA
- Average UV index in August: 6
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in August
Saint Helena, CA
- Average cloud cover in August: 8
The month with the most cloud cover is March (Cloud cover 44).
The month with the least cloud cover is July (Cloud cover 7).
Average visibility in August
Saint Helena, CA
- Average visibility in August: 6mi
The months with the highest visibility are February, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January and March (5mi).
Saint Helena, California, USA
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