August weather forecast
Galena, MO

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Weather in August

The last month of the summer, August, is another hot month in Galena, Missouri, with an average temperature varying between 87.4°F (30.8°C) and 66.4°F (19.1°C).

Temperature

The beginning of August records an average high-temperature of a still tropical 87.4°F (30.8°C), almost echoing the conditions of the previous month. Galena records an average low of 66.4°F (19.1°C) throughout the nights in August.

Heat index

In August, the heat index is calculated to be a sweltering 100.4°F (38°C). Extra safeguards are necessary to prevent heat exhaustion and heat cramps. Prolonged activity might cause heatstroke.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Direct sunlight might cause an increase of up to 15 Fahrenheit (8 Celsius) degrees in the heat index.
Note: The heat index, also known as 'feels like' or 'real feel', is a numerical representation of warmth when taking temperature and moisture levels into account. The influence of weather is personal, differing among individuals based on variations in body mass, stature, and the degree of physical exertion. When in direct sunlight, one should be cautious as it can raise the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Young ones often disregard the necessity to rest and hydrate. Thirst usually indicates advanced dehydration - hence, it is key to stay hydrated, particularly during ongoing physical activities.
To prevent overheating and help regulate its internal temperature, the human body sweat and rely on the evaporation to cool down. An increase in relative humidity hinders the body's normal cooling function by reducing evaporation, thereby decreasing the rate of body cooling and enhancing the sense of warmth. Overheating and dehydration threats arise when heat gain goes beyond what the body can comfortably shed.

Humidity

January, July, August and October, with an average relative humidity of 73%, are the least humid months in Galena.

Rainfall

In Galena, in August, during 16.1 rainfall days, 3.46" (88mm) of precipitation is typically accumulated. Throughout the year, in Galena, Missouri, there are 151.8 rainfall days, and 35.71" (907mm) of precipitation is accumulated.

Snowfall

June through October are months without snowfall in Galena.

Daylight

In Galena, Missouri, the average length of the day in August is 13h and 31min.
On the first day of August in Galena, sunrise is at 6:20 am and sunset at 8:20 pm. On the last day of the month, sunrise is at 6:44 am and sunset at 7:43 pm CDT.

Sunshine

In Galena, the average sunshine in August is 10.4h.

UV index

The average daily maximum UV index in August is 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV radiation for ordinary individuals.
Note: The daily high UV index of 6 during August translates into the following recommendations:
Fend off overexposure. Sun protection is vital. Avoid exposure to the Sun and try to stay in the shade between 10 a.m. and 4 p.m., when UV radiation is most potent, but be aware that parasols or canopies may not offer full protection. A hat with a broad brim is indispensable, filtering out up to half of UV rays.
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Frequently asked questions

Is it hot in Galena during August?

The high-temperature, in August, in Galena, records 87.4°F (30.8°C), while the low-temperature is 66.4°F (19.1°C). In August, the average heat index (a.k.a. 'felt air temperature', 'real feel'), which combines relative humidity and air temperature, is calculated to be 100.4°F (38°C).

What are the least humid months in Galena?

The months with the lowest humidity in Galena, Missouri, are January, July, August and October, with an average relative humidity of 73%.

What is the average humidity in August in Galena?

In Galena, Missouri, the average relative humidity in August is 73%.

How many days does it rain in August in Galena?

In Galena, during August, the rain falls for 16.1 days and regularly aggregates up to 3.46" (88mm) of precipitation.

When it does not snow in Galena?

In Galena, Missouri, snow does not fall in June through October.

What is the average length of the day in August in Galena?

In August, the average day length in Galena is 13h and 31min.

What time are sunrise and sunset in August in Galena?

On the first day of August in Galena, Missouri, sunrise is at 6:20 am and sunset at 8:20 pm. On the last day of the month, sunrise is at 6:44 am and sunset at 7:43 pm CDT.

How long on average sun shines in August in Galena?

In Galena, Missouri, the average sunshine duration in August is 10.4h.

What is the UV index reading in August in Galena?

In Galena, Missouri, the average daily maximum UV index in August is 6. A UV Index estimate 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
Galena, MO

Average temperature in August - Galena, 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 (42.6°F).

  • Average low temperature in August: 66.4°F

The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (27°F).

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Average pressure in August
Galena, MO

Average pressure in August - Galena, MO
  • Average pressure in August: 29.98"Hg

The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

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Average wind speed in August
Galena, MO

Average wind speed in August - Galena, MO
  • Average wind speed in August: 6.1mph

The windiest months (with the highest average wind speed) are February, March and April (9.4mph).
The calmest month (with the lowest average wind speed) is July (6mph).

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Average humidity in August
Galena, MO

Average humidity in August - Galena, MO
  • Average humidity in August: 73%

The month with the highest relative humidity is May (78%).
The months with the lowest relative humidity are January, July, August and October (73%).

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Average rainfall in August
Galena, MO

Average rainfall in August - Galena, MO
  • Average rainfall in August: 3.46"

The wettest month (with the highest rainfall) is May (5.16").
The driest month (with the least rainfall) is February (1.73").

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Average rainfall days in August
Galena, MO

Average rainfall days in August - Galena, MO
  • Average rainfall days in August: 16.1 days

The month with the highest number of rainy days is July (17 days).
The month with the least rainy days is January (7.4 days).

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Average snowfall in August
Galena, MO

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

The month with the highest snowfall is January (2.52").
The months with the least snowfall are June, July, August, September and October (0").

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Average snowfall days in August
Galena, MO

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

The month with the highest number of snowfall days is February (5.4 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in August / Average sunshine in August - Galena, MO
  • Average daylight in August: 13h and 3min

The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 42min).

  • Average sunshine in August: 10h and 2min

The month with the most sunshine is June (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 5h and 18min).

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Average sunshine days in August
Galena, MO

Average sunshine days in August - Galena, MO
  • Average sunshine days in August: 13.1 days

The month with the most sunshine days is December (20.5 days).
The month with the least sunshine days is July (11.5 days).

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Average UV index in August
Galena, MO

Average UV index in August - Galena, MO
  • Average UV index in August: 6

The month with the highest UV index is June (UV index 7).
The months with the lowest UV index are January, November and December (UV index 2).

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Average cloud cover in August
Galena, MO

Average cloud cover in August - Galena, MO
  • Average cloud cover in August: 27

The month with the most cloud cover is March (Cloud cover 47).
The month with the least cloud cover is August (Cloud cover 27).

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Average visibility in August
Galena, MO

Average visibility in August - Galena, 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).

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Galena, Missouri, USA

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