August weather forecast
Merwin, MO

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Weather in August

The last month of the summer, August, is also a moderately hot month in Merwin, Missouri, with an average temperature fluctuating between 84.9°F (29.4°C) and 65.8°F (18.8°C).

Temperature

Merwin signifies an average high-temperature of a warm 84.9°F (29.4°C) in August, closely mirroring the 86.5°F (30.3°C) of July. The nighttime temperature, during August, averages of 65.8°F (18.8°C).

Heat index

The heat index value during August is estimated at a torrid 95°F (35°C). Undertake additional precautions, heat cramps and heat exhaustion could happen. Heatstroke could occur from sustained activity.
Realize that the values for the heat index are set for shaded places and light winds. A rise of up to 15 Fahrenheit (8 Celsius) degrees in the heat index could result from direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'real feel', is an amalgamation of air temperature and humidity to express the equivalent perceived temperature. This impact is subjective, influenced by the person's physical activity and individual heat perception, affected by factors including wind, attire, and metabolic differences. Given direct exposure to sunlight, one might experience a rise in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are primarily vital for children. Children frequently underestimate the importance of resting and drinking fluids. Thirst is a symptom of advanced dehydration - hence the need to hydrate regularly, especially during protracted physical exercises.
Perspiration is the body's default response to elevated temperatures, as it promotes the evaporation of sweat to achieve cooling. When there is abundant moisture in the air, the body's cooling through the evaporation process becomes less effective, leading to the sensation of overheating. Excessive heat that's not properly managed leads to increased body temperatures and resultant health issues.

Humidity

The average relative humidity in August is 77%.

Rainfall

In Merwin, in August, it is raining for 12 days, with typically 1.5" (38mm) of accumulated precipitation. Throughout the year, there are 114.1 rainfall days, and 13.9" (353mm) of precipitation is accumulated.

Snowfall

April, June through September are months without snowfall.

Daylight

The average length of the day in August is 13h and 37min.
On the first day of August, sunrise is at 6:21 am and sunset at 8:28 pm. On the last day of the month, sunrise is at 6:47 am and sunset at 7:49 pm CDT.

Sunshine

The average sunshine in August is 10.2h.

UV index

The months with the highest UV index in Merwin are May through August, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.
Note: In August, the maximum UV index of 6 translates into these guidelines:
Use protective steps and abide by sun safety guidelines. Safeguarding against skin and eye harm is necessary. 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. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation.
Updated: Jun 20, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

Is it hot during August?

In August, the average high-temperature and low-temperature are 84.9°F (29.4°C) and 65.8°F (18.8°C) respectively. In August, the average heat index (a.k.a. 'feels like', 'apparent temperature'), which calculates the temperature value influenced by the moisture in the air, is estimated at 95°F (35°C).

What is the average humidity in August?

In Merwin, the average relative humidity in August is 77%.

How many days does it rain in August?

In Merwin, during August, the rain falls for 12 days and regularly aggregates up to 1.5" (38mm) of precipitation.

When it does not snow?

In Merwin, snow does not fall in April, June through September.

How many hours of daylight does Merwin have in August?

The average day length in August is 13h and 37min.

What time are sunrise and sunset in August?

In August, on the first day of the month, sunrise is at 6:21 am and sunset at 8:28 pm. On the last day of the month, sunrise is at 6:47 am and sunset at 7:49 pm CDT.

How many hours of sunshine does Merwin have in August?

The average sunshine duration in August is 10.2h.

What is the month with the highest UV index?

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

What is the UV index reading in August?

The average daily maximum UV index in August is 6. A UV Index estimate of 6 to 7 represents a high hazard to health from exposure to Sun's UV rays.
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
Merwin, MO

Average temperature in August - Merwin, MO
  • Average high temperature in August: 84.9°F

The warmest month (with the highest average high temperature) is July (86.5°F).
The month with the lowest average high temperature is January (38.8°F).

  • Average low temperature in August: 65.8°F

The month with the highest average low temperature is July (68.9°F).
The coldest month (with the lowest average low temperature) is January (24.3°F).

Average pressure in August
Merwin, MO

Average pressure in August - Merwin, MO
  • Average pressure in August: 29.96"Hg

The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).

Average wind speed in August
Merwin, MO

Average wind speed in August - Merwin, MO
  • Average wind speed in August: 6.6mph

The windiest month (with the highest average wind speed) is March (10.3mph).
The calmest months (with the lowest average wind speed) are July and August (6.6mph).

Average humidity in August
Merwin, MO

Average humidity in August - Merwin, MO
  • Average humidity in August: 77%

The month with the highest relative humidity is May (81%).
The month with the lowest relative humidity is October (71%).

Average rainfall in August
Merwin, MO

Average rainfall in August - Merwin, MO
  • Average rainfall in August: 1.5"

The wettest month (with the highest rainfall) is May (2.6").
The driest month (with the least rainfall) is January (0.35").

Average rainfall days in August
Merwin, MO

Average rainfall days in August - Merwin, MO
  • Average rainfall days in August: 12 days

The month with the highest number of rainy days is May (15.2 days).
The month with the least rainy days is January (3.5 days).

Average snowfall in August
Merwin, MO

Average snowfall in August - Merwin, MO
  • Average snowfall in August: 0"

The month with the highest snowfall is February (0.71").
The months with the least snowfall are April, June, July, August and September (0").

Average snowfall days in August
Merwin, MO

Average snowfall days in August - Merwin, MO
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is February (3.8 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in August /
Average sunshine in August
Merwin, MO

Average daylight in August / Average sunshine in August - Merwin, 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 month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 5h and 18min).

Average sunshine days in August
Merwin, MO

Average sunshine days in August - Merwin, MO
  • Average sunshine days in August: 16.6 days

The month with the most sunshine days is January (25.2 days).
The month with the least sunshine days is May (12.8 days).

Average UV index in August
Merwin, MO

Average UV index in August - Merwin, 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
Merwin, MO

Average cloud cover in August - Merwin, MO
  • Average cloud cover in August: 26

The month with the most cloud cover is March (Cloud cover 46).
The months with the least cloud cover are July and August (Cloud cover 26).

Average visibility in August
Merwin, MO

Average visibility in August - Merwin, 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).

Merwin, Missouri, USA

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