August weather forecast
Saint James, MO

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Weather in August

August, the last month of the summer in Saint James, is also a hot month, with an average temperature fluctuating between 65.7°F (18.7°C) and 87.4°F (30.8°C).

Temperature

August's arrival brings an average high-temperature of a still hot 87.4°F (30.8°C), demonstrating subtle variation from the preceding month. Saint James's August nights bring a significant temperature shift, averaging at an enjoyable 65.7°F (18.7°C).

Heat index

August's heat index is appraised at a torrid 100.4°F (38°C). Incorporate additional preventive steps, heat exhaustion and heat cramps are possible. Long-lasting activity may cause heatstroke.
In the scope of the heat index, its values resonate with shade and light wind conditions. The heat index has the possibility to be enhanced by 15 Fahrenheit (8 Celsius) degrees when there is direct sun exposure.
Note: The heat index, also known as 'feels like' or 'real feel', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. An individual's perception of weather can be affected by a variety of elements including metabolic differences, being pregnant, and their level of physical exertion. Direct exposure to the sun's rays can enhance the felt temperature, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are largely significant for babies and toddlers. Children often lack awareness of the importance of taking breaks and rehydrating. The feeling of thirst is a late indication of dehydration, so maintaining hydration, especially during long periods of physical activity, is critical.
Perspiration, which is the evaporation of sweat, is a primary way the human body manages and dispels excessive warmth. During high air temperature and humidity (high heat index), the process of perspiration is hindered, intensifying the sensation of heat. As the body gains more heat than it can dissipate, there's a risk of increasing temperatures and resultant overheating.

Humidity

In Saint James, the average relative humidity in August is 74%.

Rainfall

In Saint James, Missouri, in August, it is raining for 14.5 days, with typically 2.4" (61mm) of accumulated precipitation. Throughout the year, in Saint James, there are 137 rainfall days, and 24.61" (625mm) of precipitation is accumulated.

Snowfall

In Saint James, snow does not fall in April through October.

Daylight

In August, the average length of the day in Saint James is 13h and 35min.
On the first day of the month, sunrise is at 6:10 am and sunset at 8:15 pm. On the last day of August, in Saint James, sunrise is at 6:36 am and sunset at 7:36 pm CDT.

Sunshine

The average sunshine in August is 10h.

UV index

The months with the highest UV index in Saint James, Missouri, are May through August, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high health vulnerability from unsafe exposure to UV radiation for the ordinary person.
Note: A typical high UV index of 6 in August suggests the following recommendations:
Deter overexposure. Protecting against the sun's effects is essential. 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. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure.
Updated: Feb 12, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How hot is it in Saint James in August?

The average high-temperature and low-temperature during August are 87.4°F (30.8°C) and 65.7°F (18.7°C) respectively. The average heat index (a.k.a. 'felt air temperature', 'real feel'), which factors the actual air temperature with the relative humidity, in August is appraised at 100.4°F (38°C).

What is the average humidity in August in Saint James?

In Saint James, the average relative humidity in August is 74%.

How many days does it rain in August in Saint James?

In Saint James, in August, during 14.5 rainfall days, 2.4" (61mm) of precipitation is typically accumulated.

When it does not snow in Saint James?

In Saint James, snow does not fall in April through October.

What is the average length of the day in August in Saint James?

In August, the average day length in Saint James, Missouri, is 13h and 35min.

What time are sunrise and sunset in August in Saint James?

In August, on the first day of the month, sunrise is at 6:10 am and sunset at 8:15 pm. On the last day of the month, sunrise is at 6:36 am and sunset at 7:36 pm CDT.

How long on average sun shines in August in Saint James?

In August, the average sunshine duration in Saint James is 10h.

What are the months with the highest UV index in Saint James?

The months with the highest UV index in Saint James are May through August, with an average maximum UV index of 6.

What is the UV index intensity in August in Saint James?

The average daily maximum UV index in August in Saint James is 6. A UV Index reading of 6 to 7 represents a high health threat from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in August
Saint James, MO

Average temperature in August - Saint James, MO
  • Average high temperature in August: 87.4°F

The warmest month (with the highest average high temperature) is July (89.2°F).
The month with the lowest average high temperature is January (39.6°F).

  • Average low temperature in August: 65.7°F

The month with the highest average low temperature is July (67.1°F).
The coldest month (with the lowest average low temperature) is January (24.8°F).

Average pressure in August
Saint James, MO

Average pressure in August - Saint James, MO
  • Average pressure in August: 29.98"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
Saint James, MO

Average wind speed in August - Saint James, MO
  • Average wind speed in August: 5.3mph

The windiest month (with the highest average wind speed) is January (8.3mph).
The calmest months (with the lowest average wind speed) are July and August (5.3mph).

Average humidity in August
Saint James, MO

Average humidity in August - Saint James, MO
  • Average humidity in August: 74%

The month with the highest relative humidity is March (78%).
The month with the lowest relative humidity is October (73%).

Average rainfall in August
Saint James, MO

Average rainfall in August - Saint James, MO
  • Average rainfall in August: 2.4"

The wettest month (with the highest rainfall) is April (3.19").
The driest month (with the least rainfall) is February (1.3").

Average rainfall days in August
Saint James, MO

Average rainfall days in August - Saint James, MO
  • Average rainfall days in August: 14.5 days

The month with the highest number of rainy days is July (15.7 days).
The month with the least rainy days is January (6.5 days).

Average snowfall in August
Saint James, MO

Average snowfall in August - Saint James, MO
  • Average snowfall in August: 0"

The months with the highest snowfall are February and December (2.09").
The months with the least snowfall are April, May, June, July, August, September and October (0").

Average snowfall days in August
Saint James, MO

Average snowfall days in August - Saint James, MO
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is January (7.6 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
Saint James, MO

Average daylight in August / Average sunshine in August - Saint James, 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 0min

The months with the most sunshine are June and July (Average sunshine: 10h and 18min).
The months with the least sunshine are January and February (Average sunshine: 4h and 36min).

Average sunshine days in August
Saint James, MO

Average sunshine days in August - Saint James, MO
  • Average sunshine days in August: 13.2 days

The month with the most sunshine days is October (19.5 days).
The month with the least sunshine days is July (12.6 days).

Average UV index in August
Saint James, MO

Average UV index in August - Saint James, 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 and December (UV index 2).

Average cloud cover in August
Saint James, MO

Average cloud cover in August - Saint James, MO
  • Average cloud cover in August: 32

The months with the most cloud cover are February and March (Cloud cover 51).
The month with the least cloud cover is June (Cloud cover 30).

Average visibility in August
Saint James, MO

Average visibility in August - Saint James, MO
  • Average visibility in August: 5mi

The months with the highest visibility are January, February, March, April, June, October, November and December (6mi).
The months with the lowest visibility are May, July, August and September (5mi).

Saint James, Missouri, USA

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