August weather forecastNorwalk, IA
August
Weather in August
August, the last month of the summer in Norwalk, is another warm month, with an average temperature fluctuating between 81.7°F (27.6°C) and 62.6°F (17°C).Temperature
Norwalk experiences an average high-temperature of a still warm 81.7°F (27.6°C) in August, subtly different from July's 83.1°F (28.4°C). Norwalk usually reports an average low-temperature of 62.6°F (17°C) during the month of August.Heat index
In August, the heat index is calculated to be a hot 87.8°F (31°C). With constant exposure and activity, a state of weariness might ensue, leading to potential heat cramps.Regarding the heat index, one should be aware it's determined by shaded settings and mild winds. An exposure to direct sunlight may lift the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', is a measure of how hot it feels when the actual air humidity is factored in. The impact of weather on an individual can be subjective, affected by the person's activity and heat perception, which can vary due to elements including wind, clothing, and metabolic differences. Direct sun rays have a notable impact on perceived temperature, which can raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular significance for children. Children often fail to understand the importance of rest and rehydration. Thirst is a late manifestation of dehydration - hence, it is crucial to stay hydrated, especially during ongoing physical activities.
Humidity
The average relative humidity in August is 78%.Rainfall
In Norwalk, Iowa, in August, during 11.8 rainfall days, 1.85" (47mm) of precipitation is typically accumulated. Throughout the year, there are 114.4 rainfall days, and 16.38" (416mm) of precipitation is accumulated.Snowfall
In Norwalk, snow does not fall in June through September.Daylight
In August, the average length of the day in Norwalk, Iowa, is 13h and 47min.On the first day of August, sunrise is at 6:10 am and sunset at 8:31 pm. On the last day of the month, sunrise is at 6:40 am and sunset at 7:48 pm CDT.
Sunshine
In August, the average sunshine is 9.9h.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 health hazard from unsafe exposure to UV radiation for average individuals.Note: A maximum high daily UV index of 6 during August translates into the following directions:
Take precautions against overexposure. Protection against sun damage is needed. 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. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
Norwalk, IA
- Average high temperature in August: 81.7°F
The warmest month (with the highest average high temperature) is July (83.1°F).
The month with the lowest average high temperature is January (28.2°F).
- Average low temperature in August: 62.6°F
The month with the highest average low temperature is July (65.5°F).
The coldest month (with the lowest average low temperature) is January (15.1°F).
Average pressure in August
Norwalk, IA
- Average pressure in August: 29.97"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in August
Norwalk, IA
- Average wind speed in August: 7mph
The windiest months (with the highest average wind speed) are January, February, March and April (10.3mph).
The calmest months (with the lowest average wind speed) are July and August (7mph).
Average humidity in August
Norwalk, IA
- Average humidity in August: 78%
The months with the highest relative humidity are January and June (82%).
The month with the lowest relative humidity is October (70%).
Average rainfall in August
Norwalk, IA
- Average rainfall in August: 1.85"
The wettest month (with the highest rainfall) is May (2.76").
The driest month (with the least rainfall) is January (0.47").
Average rainfall days in August
Norwalk, IA
- Average rainfall days in August: 11.8 days
The month with the highest number of rainy days is June (15.9 days).
The month with the least rainy days is February (3 days).
Average snowfall in August
Norwalk, IA
- Average snowfall in August: 0"
The month with the highest snowfall is January (2.24").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in August
Norwalk, IA
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is January (8.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in August /
Average sunshine in August
Norwalk, IA
- 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 12min).
- Average sunshine in August: 9h and 54min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 18min).
Average sunshine days in August
Norwalk, IA
- Average sunshine days in August: 16.7 days
The month with the most sunshine days is December (22.3 days).
The month with the least sunshine days is June (12.2 days).
Average UV index in August
Norwalk, IA
- Average UV index in August: 6
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in August
Norwalk, IA
- Average cloud cover in August: 30
The month with the most cloud cover is January (Cloud cover 54).
The months with the least cloud cover are July and September (Cloud cover 29).
Average visibility in August
Norwalk, IA
- 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).
