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
Transitioning into August, Jamestown records an average high-temperature of a still tropical 86°F (30°C), almost identical to July's 87.6°F (30.9°C). Jamestown encounters a steady low-temperature average of 65.8°F (18.8°C) throughout the month of August.Heat index
The heat index in August is appraised at a torrid 96.8°F (36°C). More preventive actions are needed, risk of heat exhaustion and heat cramps is significant. Prolonged activity may trigger heatstroke.Remember that heat index calculations are made for conditions in the shade with light wind. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', provides an understanding of perceived warmth by combining temperature and relative humidity. The individual's temperature perception can be influenced by numerous factors such as metabolic variations, physical activity, and clothing. Consider the sun's direct rays and their impact; they can potentially increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly important for children. Kids generally face higher risks than adults as they sweat less. Along with their large skin surface compared to their small bodies and higher heat production due to their activities, their vulnerability is increased.
In response to overheating, the human body perspires to cool down, mainly through the evaporation of sweat. An upsurge in relative humidity affects normal body cooling mechanisms by slowing evaporation, hence reducing the rate at which the body cools and intensifying the perception of heat. If heat absorption exceeds the body's cooling ability, body temperature can elevate, resulting in potential thermal illnesses.
Humidity
The average relative humidity in August is 75%.Rainfall
In August, the rain falls for 8.2 days. Throughout August, 0.67" (17mm) of precipitation is accumulated. Throughout the year, in Jamestown, there are 95.5 rainfall days, and 8.62" (219mm) of precipitation is accumulated.Snowfall
April through September are months without snowfall in Jamestown.Daylight
In August, the average length of the day in Jamestown is 13h and 38min.On the first day of August in Jamestown, sunrise is at 6:11 am and sunset at 8:20 pm. On the last day of the month, sunrise is at 6:38 am and sunset at 7:41 pm CDT.
Sunshine
In August, the average sunshine is 10.1h.UV index
The months with the highest UV index in Jamestown are June through August, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high threat to health from exposure to the Sun's UV rays for average individuals.Note: The UV index of 6 in August translates into these instructions:
Ward off overexposure. Defence against solar harm is crucial. Avoid direct Sun exposure and seek shade from 10 a.m. to 4 p.m., the period of highest UV radiation. Remember, however, that not all shade structures offer full protection. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is it in Jamestown in August?
What is the average humidity in August in Jamestown?
How much does it rain in Jamestown in August?
When it does not snow in Jamestown?
What is the average length of the day in August in Jamestown?
When are sunrise and sunset in August in Jamestown?
How many hours of sunshine does Jamestown have in August?
When is the highest UV index in Jamestown?
What is the UV index intensity in August in Jamestown?
Average temperature in August
Jamestown, MO
- Average high temperature in August: 86°F
The warmest month (with the highest average high temperature) is July (87.6°F).
The month with the lowest average high temperature is January (36.9°F).
- Average low temperature in August: 65.8°F
The month with the highest average low temperature is July (68°F).
The coldest month (with the lowest average low temperature) is January (23°F).
Average pressure in August
Jamestown, 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 (29.91"Hg).
Average wind speed in August
Jamestown, MO
- Average wind speed in August: 6.2mph
The windiest months (with the highest average wind speed) are January and March (9.4mph).
The calmest month (with the lowest average wind speed) is July (6.1mph).
Average humidity in August
Jamestown, MO
- Average humidity in August: 75%
The month with the highest relative humidity is May (78%).
The month with the lowest relative humidity is October (71%).
Average rainfall in August
Jamestown, MO
- Average rainfall in August: 0.67"
The wettest month (with the highest rainfall) is May (1.3").
The driest months (with the least rainfall) are January and February (0.43").
Average rainfall days in August
Jamestown, MO
- Average rainfall days in August: 8.2 days
The months with the highest number of rainy days are April and May (11.3 days).
The month with the least rainy days is January (3.8 days).
Average snowfall in August
Jamestown, MO
- Average snowfall in August: 0"
The month with the highest snowfall is January (0.67").
The months with the least snowfall are April, May, June, July, August and September (0").
Average snowfall days in August
Jamestown, MO
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is February (5.3 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in August /
Average sunshine in August
Jamestown, 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 30min).
- Average sunshine in August: 10h and 1min
The months with the most sunshine are June and July (Average sunshine: 10h and 24min).
The months with the least sunshine are January and February (Average sunshine: 4h and 42min).
Average sunshine days in August
Jamestown, MO
- Average sunshine days in August: 19.8 days
The month with the most sunshine days is December (23.7 days).
The month with the least sunshine days is May (15.6 days).
Average UV index in August
Jamestown, MO
- 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 2).
Average cloud cover in August
Jamestown, MO
- Average cloud cover in August: 29
The months with the most cloud cover are January, February and March (Cloud cover 49).
The months with the least cloud cover are June, July and August (Cloud cover 29).
Average visibility in August
Jamestown, MO
- 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).
Jamestown, Missouri, USA
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