August weather forecastNorwalk, CT
August
Weather in August
The summer season reaches its finale in August, with temperature highs nearly matching those of July at 80.1°F (26.7°C), and lows resting at 67.8°F (19.9°C). Although warmer than June, August brings an appealing end to the summer season, balancing heat with the slight cooling breeze. This month typically calls for relaxation by the beach, pool parties, and outdoor cookouts as residents make the most of the last summer days.Temperature
In August, Norwalk experiences a barely noticeable shift in meteorological conditions, with average high-temperatures moving from 81.1°F (27.3°C) in July to a still moderately hot 80.1°F (26.7°C). Throughout August nights, Norwalk registers an average low-temperature of 67.8°F (19.9°C).Humidity
In August, the average relative humidity is 73%.Rainfall
In Norwalk, Connecticut, in August, during 16.8 rainfall days, 3.54" (90mm) of precipitation is typically accumulated. Throughout the year, in Norwalk, there are 166.3 rainfall days, and 37.87" (962mm) of precipitation is accumulated.Snowfall
In Norwalk, snow does not fall in May through October.Ocean temperature
August is the month with the warmest seawater, with an average ocean temperature of 73°F (22.8°C).Note: For those with a heightened sensitivity to cold, sunshine, wind, and outside temperature make a big difference in enjoying a swim at 73°F (22.8°C). (Olympic swimming regulations state a water temperature of 77°F (25°C) to 82.4°F (28°C).)
Daylight
The average length of the day in August in Norwalk, Connecticut, is 13h and 46min.On the first day of August in Norwalk, sunrise is at 5:50 am and sunset at 8:09 pm. On the last day of the month, sunrise is at 6:19 am and sunset at 7:27 pm EDT.
Sunshine
The average sunshine in August in Norwalk is 10.4h.UV index
June through August, with an average maximum UV index of 6, are months with the highest UV index in Norwalk, Connecticut. A UV Index value of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV radiation for average individuals.Note: In August, the maximum UV index of 6 suggests this advice:
Undertake precautions and comply with sun safety standards. Protection from skin and eye injury is vital. The Sun emits the most powerful UV radiation between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly. Caution! Sand and water surfaces escalate the UV intensity from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
Norwalk, CT
- Average high temperature in August: 80.1°F
The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (35.8°F).
- Average low temperature in August: 67.8°F
The month with the highest average low temperature is July (68.2°F).
The coldest month (with the lowest average low temperature) is January (26.4°F).
Average pressure in August
Norwalk, CT
- Average pressure in August: 29.98"Hg
The month with the highest atmospheric pressure is November (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in August
Norwalk, CT
- Average wind speed in August: 6.6mph
The windiest month (with the highest average wind speed) is January (10.1mph).
The calmest month (with the lowest average wind speed) is July (6.5mph).
Average humidity in August
Norwalk, CT
- Average humidity in August: 73%
The months with the highest relative humidity are February, May and June (76%).
The months with the lowest relative humidity are April and November (72%).
Average rainfall in August
Norwalk, CT
- Average rainfall in August: 3.54"
The wettest month (with the highest rainfall) is July (4.13").
The driest months (with the least rainfall) are January and February (2.36").
Average rainfall days in August
Norwalk, CT
- Average rainfall days in August: 16.8 days
The month with the highest number of rainy days is July (18.1 days).
The month with the least rainy days is January (8.3 days).
Average snowfall in August
Norwalk, CT
- Average snowfall in August: 0"
The month with the highest snowfall is February (2.83").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in August
Norwalk, CT
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is February (7.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average sea temperature in August
Norwalk, CT
- Average sea temperature in August: 73°F
The best month for swimming (with the highest average sea temperature) is August (73°F).
The coldest month (with the lowest average sea temperature) is February (39°F).
Average daylight in August /
Average sunshine in August
Norwalk, CT
- Average daylight in August: 13h and 48min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in August: 10h and 24min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).
Average sunshine days in August
Norwalk, CT
- Average sunshine days in August: 11.5 days
The month with the most sunshine days is January (17.8 days).
The month with the least sunshine days is June (10 days).
Average UV index in August
Norwalk, CT
- 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, March, November and December (UV index 2).
Average cloud cover in August
Norwalk, CT
- Average cloud cover in August: 30
The months with the most cloud cover are February, March and December (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in August
Norwalk, CT
- 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).
