August weather forecast
Fort Madison, IA

Weather in August

August, the last month of the summer, in Fort Madison, is another warm month, with average temperature fluctuating between 82.2°F (27.9°C) and 63.9°F (17.7°C).

Temperature

In Fort Madison, the average high-temperature is almost the same as in July - a still moderately hot 82.2°F (27.9°C). In Fort Madison, in August, the average low-temperature is 63.9°F (17.7°C).

Heat index

In August, the average heat index is evaluated at a tropical 88.9°F (31.6°C). Exhaustion is likely with prolonged exposure and activity. Sustaining activity may result in heat cramps.
Note that heat index values are valued for light wind and location in the shade. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like', 'apparent temperature', 'real feel', or 'felt air temperature', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (metabolic differences, pregnancy, clothing). Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.

Humidity

The average relative humidity is 78%.

Rainfall

In Fort Madison, in August, it is raining for 9.8 days, with typically 0.83" (21mm) of accumulated precipitation. In Fort Madison, during the entire year, the rain falls for 101.8 days and collects up to 9.92" (252mm) of precipitation.

Snowfall

In Fort Madison snow does not fall in May through September.

Daylight

In Fort Madison, the average length of the day in August is 13.7h.

Sunshine

The average sunshine in Fort Madison is 10.1h.

UV index

June through August, with an average maximum UV index of 6, are months with the highest UV index. A UV Index of 6 to 7 symbolizes a high health vulnerability from the exposure to the Sun's UV rays for the ordinary person.
Note: In August, the average maximum UV index of 6 translate into the following recommendations:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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FAQ

What is the temperature in August in Fort Madison?

In Fort Madison, in August, the average high-temperature is 82.2°F (27.9°C), and the average low-temperature is 63.9°F (17.7°C). In August, the average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which takes the relative humidity and factors it into the air temperature reading, is evaluated at 88.9°F (31.6°C).

What is the average humidity in August in Fort Madison?

In Fort Madison, Iowa, the average relative humidity in August is 78%.

How much does it rain in Fort Madison in August?

In Fort Madison, Iowa, during August, the rain falls for 9.8 days and regularly aggregates up to 0.83" (21mm) of precipitation.

When it does not snow in Fort Madison?

In Fort Madison, Iowa, snow does not fall in May through September.

How many hours of daylight does Fort Madison have in August?

The average length of the day in August in Fort Madison, Iowa, is 13.7h.

How many hours of sunshine does Fort Madison have in August?

In Fort Madison, Iowa, the average sunshine in August is 10.1h.

What is the month with the highest UV index in Fort Madison?

Months with the highest UV index in Fort Madison are June through August, with an average maximum UV index of 6.

What is the UV index reading in August in Fort Madison?

The average daily maximum UV index in August in Fort Madison is 6. A UV Index value of 6 to 7 symbolizes a high health threat from unprotected exposure to the UV radiation.

Average temperature in August
Fort Madison, IA

Average temperature in August - Fort Madison, IA
  • Average high temperature in August: 82.2°F

The warmest month (with the highest average high temperature) is July (82.9°F).
The month with the lowest average high temperature is January (30.4°F).

  • Average low temperature in August: 63.9°F

The month with the highest average low temperature is July (66.2°F).
The coldest month (with the lowest average low temperature) is January (18.5°F).

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Average pressure in August
Fort Madison, IA

Average pressure in August - Fort Madison, IA
  • Average pressure in August: 29.97"

The month with the highest atmospheric pressure is January (30.15").
The month with the lowest atmospheric pressure is June (29.9").

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Average wind speed in August
Fort Madison, IA

Average wind speed in August - Fort Madison, IA
  • Average wind speed in August: 6.7mph

The windiest months (with the highest average wind speed) are January, February, March and April (10.4mph).
The calmest months (with the lowest average wind speed) are July and August (6.7mph).

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Average humidity in August
Fort Madison, IA

Average humidity in August - Fort Madison, IA
  • Average humidity in August: 78%

The month with the highest relative humidity is July (82%).
The month with the lowest relative humidity is October (71%).

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Average rainfall in August
Fort Madison, IA

Average rainfall in August - Fort Madison, IA
  • Average rainfall in August: 0.83"

The wettest month (with the highest rainfall) is May (1.46").
The driest months (with the least rainfall) are January and December (0.47").

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Average rainfall days in August
Fort Madison, IA

Average rainfall days in August - Fort Madison, IA
  • Average rainfall days in August: 9.8 days

The month with the highest number of rainy days is May (14.4 days).
The month with the least rainy days is February (3.5 days).

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Average snowfall in August
Fort Madison, IA

Average snowfall in August - Fort Madison, IA
  • Average snowfall in August: 0"

The month with the highest snowfall is January (1.1").
Months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in August
Fort Madison, IA

Average snowfall days in August - Fort Madison, IA
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is January (7.7 days).
Months with the least snowfall days are May, June, July, August and September (0 days).

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Average daylight in August /
Average sunshine in August
Fort Madison, IA

Average daylight in August / Average sunshine in August - Fort Madison, IA
  • Average daylight in August: 13.7h

The month with the longest days is June (Average daylight: 15h).
The month with the shortest days is December (Average daylight: 9.3h).

  • Average sunshine in August: 10.1h

The month with the most sunshine is July (Average sunshine: 10.4h).
The month with the least sunshine is January (Average sunshine: 4.3h).

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Average sunshine days in August
Fort Madison, IA

Average sunshine days in August - Fort Madison, IA
  • Average sunshine days in August: 17.6 days

The month with the most sunshine days is December (22.9 days).
The month with the least sunshine days is May (14 days).

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Average UV index in August
Fort Madison, IA

Average UV index in August - Fort Madison, IA
  • Average UV index in August: 6

Months with the highest UV index are June, July and August (UV index 6).
Months with the lowest UV index are January, February, November and December (UV index 2).

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Average cloud cover in August
Fort Madison, IA

Average cloud cover in August - Fort Madison, IA
  • Average cloud cover in August: 28

The month with the most cloud cover is January (Cloud cover 54).
Months with the least cloud cover are July, August and September (Cloud cover 28).

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Average visibility in August
Fort Madison, IA

Average visibility in August - Fort Madison, IA
  • Average visibility in August: 6mi

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

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