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 sea temperature 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
Portsmouth's weather, upon August's arrival, documents an average high-temperature of a warm 84.7°F (29.3°C), nearly identical to the prior month. During August, Portsmouth's temperature averages to a pleasant 73°F (22.8°C) at night.Heat index
The average heat index in August is evaluated at a hot 93.2°F (34°C). Incorporate additional safety actions, heat cramps and heat exhaustion are possible. Long-term activity may induce heatstroke.It is important to note that the heat index values are for shaded areas and light wind scenarios. Exposure to unobstructed sunshine could lead to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', represents the fusion of temperature and moisture in the air to suggest how warm it feels. The effect is experienced differently by individuals, hinging on unique characteristics such as body mass, stature, and level of activity. Keep in mind that direct sunshine exposure can amplify the weather's effects, possibly increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for babies and toddlers. Young individuals usually face greater risks than adults as their sweat production is less. Also, their larger skin surface relative to their small bodies and the high heat generation due to their activity contributes to their vulnerability.
Humidity
The average relative humidity in August is 75%.Rainfall
The month with the most rainfall in Portsmouth is August, when the rain falls for 16.9 days and typically aggregates up to 2.52" (64mm) of precipitation.Snowfall
In Portsmouth, snow does not fall in April through October.Ocean temperature
The month with the warmest seawater is August, with an average ocean temperature of 80.1°F (26.7°C).Note: Temperatures between 77°F (25°C) and 84.2°F (29°C) are ideal for swimming, diving, and similar water activities, ensuring pleasure and comfort for extended periods without feeling uneasy.
Daylight
In August, the average length of the day in Portsmouth is 13h and 32min.On the first day of August, sunrise is at 6:11 am and sunset at 8:11 pm. On the last day of the month, sunrise is at 6:35 am and sunset at 7:34 pm EDT.
Sunshine
In August, the average sunshine is 10.6h.UV index
July and August, with an average maximum UV index of 7, are months with the highest UV index in Portsmouth. A UV Index estimate of 6 to 7 represents a high health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The UV index of 7 during August translates into the following guidance:
Take precautions and utilize sun safety practices. Protection against skin and eye damage is required. UV radiation from the Sun is most intense between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. Employ a hat with a wide brim for robust protection, cutting UV exposure by half. Take caution! The UV rays from the Sun gain strength from sand and water reflections.
Frequently asked questions
Is it hot in Portsmouth during August?
What is the average humidity in August in Portsmouth?
What is the wettest month in Portsmouth?
How much does it rain in Portsmouth in August?
When it does not snow in Portsmouth?
What is the month with the warmest ocean in Portsmouth?
What is the ocean temperature in August in Portsmouth?
How many hours of daylight does Portsmouth have in August?
When are sunrise and sunset in August in Portsmouth?
How long on average sun shines in August in Portsmouth?
When is the highest UV index in Portsmouth?
How high is the UV index in August in Portsmouth?
Average temperature in August
Portsmouth, VA
- Average high temperature in August: 84.7°F
The warmest month (with the highest average high temperature) is July (86.4°F).
The month with the lowest average high temperature is January (45.9°F).
- Average low temperature in August: 73°F
The month with the highest average low temperature is July (73.6°F).
The coldest month (with the lowest average low temperature) is January (34.7°F).
Average pressure in August
Portsmouth, VA
- Average pressure in August: 29.99"Hg
The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.96"Hg).
Average wind speed in August
Portsmouth, VA
- Average wind speed in August: 7.5mph
The windiest months (with the highest average wind speed) are March and April (10.5mph).
The calmest month (with the lowest average wind speed) is August (7.5mph).
Average humidity in August
Portsmouth, VA
- Average humidity in August: 75%
The month with the highest relative humidity is May (78%).
The months with the lowest relative humidity are July and November (74%).
Average rainfall in August
Portsmouth, VA
- Average rainfall in August: 2.52"
The wettest month (with the highest rainfall) is August (2.52").
The driest month (with the least rainfall) is November (1.1").
Average rainfall days in August
Portsmouth, VA
- Average rainfall days in August: 16.9 days
The month with the highest number of rainy days is July (17.4 days).
The month with the least rainy days is November (8.3 days).
Average snowfall in August
Portsmouth, VA
- Average snowfall in August: 0"
The month with the highest snowfall is January (0.47").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in August
Portsmouth, VA
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is January (2.2 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average sea temperature in August
Portsmouth, VA
- Average sea temperature in August: 80°F
The best month for swimming (with the highest average sea temperature) is August (80°F).
The coldest month (with the lowest average sea temperature) is February (44.5°F).
Average daylight in August /
Average sunshine in August
Portsmouth, VA
- Average daylight in August: 13h and 3min
The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in August: 10h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 54min).
The month with the least sunshine is February (Average sunshine: 5h and 24min).
Average sunshine days in August
Portsmouth, VA
- Average sunshine days in August: 10.8 days
The month with the most sunshine days is October (19.5 days).
The month with the least sunshine days is August (10.8 days).
Average UV index in August
Portsmouth, VA
- Average UV index in August: 7
The months with the highest UV index are July and August (UV index 7).
The month with the lowest UV index is January (UV index 2).
Average cloud cover in August
Portsmouth, VA
- Average cloud cover in August: 29
The month with the most cloud cover is March (Cloud cover 44).
The month with the least cloud cover is July (Cloud cover 26).
Average visibility in August
Portsmouth, VA
- 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).
Portsmouth, Virginia, USA
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