August weather forecastVandalia, MO
August
Weather in August
The last month of the summer, August, is also a moderately hot month in Vandalia, Missouri, with temperature in the range of an average high of 84.2°F (29°C) and an average low of 65.7°F (18.7°C).Temperature
As August takes hold, the average high-temperature is a still moderately hot 84.2°F (29°C), nearly mirroring that of the previous month. Throughout August, a steady low-temperature average of 65.7°F (18.7°C) is noted.Heat index
For most parts of August, the heat index is estimated at a tropical 93.2°F (34°C). Adopt heightened safety measures, heat cramps and heat exhaustion may occur. Sustained activity might cause heatstroke.Factoring in the heat index, values are geared towards shaded areas with light breezes. With exposure to direct sunshine, the heat index could climb by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', provides an understanding of perceived warmth by combining temperature and relative humidity. The effect is personal, with varied weather perceptions among individuals due to differences in body mass, stature, and physical activity. Given the impact of direct sunlight, it's noteworthy that the felt temperature can rise by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to babies and toddlers. 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.
Humidity
In Vandalia, the average relative humidity in August is 77%.Rainfall
In Vandalia, in August, it is raining for 13.4 days, with typically 2.6" (66mm) of accumulated precipitation. Throughout the year, in Vandalia, there are 142.4 rainfall days, and 28.98" (736mm) of precipitation is accumulated.Snowfall
May through September are months without snowfall in Vandalia, Missouri.Daylight
In Vandalia, the average length of the day in August is 13h and 40min.On the first day of the month, sunrise is at 6:06 am and sunset at 8:17 pm. On the last day of August, sunrise is at 6:34 am and sunset at 7:37 pm CDT.
Sunshine
In August, the average sunshine in Vandalia is 10h.UV index
The months with the highest UV index are June through August, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to UV radiation for average individuals.Note: The maximum UV index of 6 during August leads to these instructions:
Avoid excessive sunlight. Those with lighter skin may experience burning in less than 20 minutes. 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. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
Vandalia, MO
- Average high temperature in August: 84.2°F
The warmest month (with the highest average high temperature) is July (85.5°F).
The month with the lowest average high temperature is January (35.2°F).
- Average low temperature in August: 65.7°F
The month with the highest average low temperature is July (67.5°F).
The coldest month (with the lowest average low temperature) is January (21.9°F).
Average pressure in August
Vandalia, 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
Vandalia, MO
- Average wind speed in August: 6.2mph
The windiest months (with the highest average wind speed) are January and February (9.8mph).
The calmest months (with the lowest average wind speed) are July and August (6.2mph).
Average humidity in August
Vandalia, MO
- Average humidity in August: 77%
The months with the highest relative humidity are May and July (79%).
The month with the lowest relative humidity is October (71%).
Average rainfall in August
Vandalia, MO
- Average rainfall in August: 2.6"
The wettest month (with the highest rainfall) is May (3.62").
The driest month (with the least rainfall) is January (1.46").
Average rainfall days in August
Vandalia, MO
- Average rainfall days in August: 13.4 days
The month with the highest number of rainy days is May (17.7 days).
The month with the least rainy days is January (5.9 days).
Average snowfall in August
Vandalia, MO
- Average snowfall in August: 0"
The month with the highest snowfall is January (3.7").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in August
Vandalia, MO
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is January (7.5 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
Vandalia, MO
- Average daylight in August: 13h and 42min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in August: 10h and 0min
The month with the most sunshine is June (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 30min).
Average sunshine days in August
Vandalia, MO
- Average sunshine days in August: 15.4 days
The month with the most sunshine days is December (20 days).
The month with the least sunshine days is May (11.5 days).
Average UV index in August
Vandalia, 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
Vandalia, MO
- Average cloud cover in August: 29
The month with the most cloud cover is January (Cloud cover 51).
The months with the least cloud cover are June, July and August (Cloud cover 29).
Average visibility in August
Vandalia, 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).
