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
As Sullivan welcomes August, the average high-temperature stabilizes at a still tropical 87.1°F (30.6°C), showing little deviation from July's 88.3°F (31.3°C). An average temperature of 65.7°F (18.7°C) is recorded during the nights in August.Heat index
The average heat index in August is evaluated at a fiery hot 100.4°F (38°C). Adopt heightened preventive measures, heat exhaustion and heat cramps are probable. Persistent activity could lead to heatstroke.Metrics for the heat index primarily focus on shaded spots and light wind conditions. If exposed to direct sunlight, the heat index could climb by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', gives an indication of how one might feel in terms of heat after considering humidity. Physical activity, clothing, and metabolic variations are additional factors that impact an individual's perception of temperature. By being directly under the sun, it's possible for the felt temperature to increase by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for babies and toddlers. Children frequently do not comprehend the need for rest and hydration. Thirst is an advanced stage of dehydration - staying hydrated, especially during extended physical exercises, is essential.
To offset high temperatures, the human body releases sweat which, upon evaporation, cools it down. Augmented relative humidity impedes typical body cooling mechanisms by lowering the evaporation rate, resulting in decreased body cooling and an amplified perception of heat. When heat gain surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.
Humidity
In Sullivan, the average relative humidity in August is 74%.Rainfall
In Sullivan, in August, during 15 rainfall days, 3.23" (82mm) of precipitation is typically accumulated. In Sullivan, during the entire year, the rain falls for 149.6 days and collects up to 32.05" (814mm) of precipitation.Snowfall
In Sullivan, snow does not fall in April through October.Daylight
In August, the average length of the day in Sullivan is 13h and 36min.On the first day of the month, sunrise is at 6:07 am and sunset at 8:13 pm. On the last day of August, sunrise is at 6:34 am and sunset at 7:35 pm CDT.
Sunshine
In Sullivan, the average sunshine in August is 10.1h.UV index
May through August, with an average maximum UV index of 6, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high health risk from exposure to the Sun's UV radiation for ordinary individuals.Note: In August, the maximum UV index of 6 suggests these recommendations:
Undertake protective measures and comply with sun safety rules. Shielding against skin and eye damage is essential. Remember that UV radiation from the Sun is strongest between 10 a.m. and 4 p.m. Make an effort to limit direct sun exposure during this time. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is August in Sullivan?
What is the average humidity in August in Sullivan?
How many days does it rain in August in Sullivan?
When it does not snow in Sullivan?
How many hours of daylight does Sullivan have in August?
When is the sunrise / sunset in August in Sullivan?
How many hours of sunshine does Sullivan have in August?
What are the months with the highest UV index in Sullivan?
What is the UV index reading in August in Sullivan?
Average temperature in August
Sullivan, MO
- Average high temperature in August: 87.1°F
The warmest month (with the highest average high temperature) is July (88.3°F).
The month with the lowest average high temperature is January (39°F).
- Average low temperature in August: 65.7°F
The month with the highest average low temperature is July (67.6°F).
The coldest month (with the lowest average low temperature) is January (24.4°F).
Average pressure in August
Sullivan, MO
- 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 (29.92"Hg).
Average wind speed in August
Sullivan, MO
- Average wind speed in August: 5.3mph
The windiest month (with the highest average wind speed) is January (8.6mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).
Average humidity in August
Sullivan, MO
- Average humidity in August: 74%
The month with the highest relative humidity is May (78%).
The month with the lowest relative humidity is October (72%).
Average rainfall in August
Sullivan, MO
- Average rainfall in August: 3.23"
The wettest month (with the highest rainfall) is April (3.86").
The driest month (with the least rainfall) is November (1.85").
Average rainfall days in August
Sullivan, MO
- Average rainfall days in August: 15 days
The month with the highest number of rainy days is May (16.9 days).
The month with the least rainy days is January (7 days).
Average snowfall in August
Sullivan, MO
- Average snowfall in August: 0"
The month with the highest snowfall is January (2.68").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in August
Sullivan, MO
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is January (7.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in August /
Average sunshine in August
Sullivan, MO
- 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 36min).
- Average sunshine in August: 10h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 4h and 42min).
Average sunshine days in August
Sullivan, MO
- Average sunshine days in August: 13.4 days
The month with the most sunshine days is January (19.1 days).
The month with the least sunshine days is July (11.9 days).
Average UV index in August
Sullivan, MO
- Average UV index in August: 6
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in August
Sullivan, MO
- Average cloud cover in August: 30
The month with the most cloud cover is February (Cloud cover 49).
The months with the least cloud cover are June and July (Cloud cover 29).
Average visibility in August
Sullivan, MO
- Average visibility in August: 6mi
The months with the highest visibility are January, February, March, April, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is May (5mi).
Sullivan, Missouri, USA
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