Contents
- Weather in August
- Frequently asked questions
- Average temperature in August
- Average pressure in August
- Average wind speed in August
- Average humidity in August
- Average rainfall in August
- Average rainfall days in August
- Average snowfall in August
- Average snowfall days in August
- Average daylight in August
- Average sunshine in August
- Average sunshine days in August
- Average UV index in August
- Average cloud cover in August
- Average visibility in August
Weather in August
Temperature
The average high-temperature in August, at a still moderately hot 78.6°F (25.9°C), reveals a modest deviation from July's 80.1°F (26.7°C). During August, the temperature in Castle Grove tends to dip to an average of 60.6°F (15.9°C) at night.Humidity
In August, the average relative humidity is 81%.Rainfall
In August, in Castle Grove, the rain falls for 12.5 days. Throughout August, 1.77" (45mm) of precipitation is accumulated. Throughout the year, in Castle Grove, Iowa, there are 142.5 rainfall days, and 28.27" (718mm) of precipitation is accumulated.Snowfall
In Castle Grove, snow does not fall in May through September.Daylight
The average length of the day in August in Castle Grove is 13h and 50min.On the first day of August in Castle Grove, Iowa, sunrise is at 5:58 am and sunset at 8:24 pm. On the last day of the month, sunrise is at 6:30 am and sunset at 7:40 pm CDT.
Sunshine
July and August, with an average of 9.9h of sunshine, are months with the most sunshine.UV index
In Castle Grove, the average daily maximum UV index in August is 5. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for ordinary individuals.Note: A typical high UV index of 5 in August suggests the following recommendations:
Adopt protective measures - Requirement to safeguard skin and eyes from harm exists. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. Tightly woven clothing, when worn loosely, shields effectively against the Sun.
Frequently asked questions
What are August temperatures in Castle Grove?
What is the average humidity in August in Castle Grove?
How many days does it rain in August in Castle Grove?
When it does not snow in Castle Grove?
What is the average length of the day in August in Castle Grove?
When are sunrise and sunset in August in Castle Grove?
What is the month with the most sunshine in Castle Grove?
How long on average sun shines in August in Castle Grove?
How high is the UV index in August in Castle Grove?
Average temperature in August
Castle Grove, IA
- Average high temperature in August: 78.6°F
The warmest month (with the highest average high temperature) is July (80.1°F).
The month with the lowest average high temperature is January (25.2°F).
- Average low temperature in August: 60.6°F
The month with the highest average low temperature is July (63.3°F).
The coldest month (with the lowest average low temperature) is January (13.3°F).
Average pressure in August
Castle Grove, IA
- Average pressure in August: 29.97"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in August
Castle Grove, IA
- Average wind speed in August: 6.9mph
The windiest month (with the highest average wind speed) is April (10.7mph).
The calmest month (with the lowest average wind speed) is August (6.9mph).
Average humidity in August
Castle Grove, IA
- Average humidity in August: 81%
The months with the highest relative humidity are January and February (86%).
The month with the lowest relative humidity is October (74%).
Average rainfall in August
Castle Grove, IA
- Average rainfall in August: 1.77"
The wettest month (with the highest rainfall) is May (4.25").
The driest months (with the least rainfall) are January and February (1.26").
Average rainfall days in August
Castle Grove, IA
- Average rainfall days in August: 12.5 days
The month with the highest number of rainy days is May (18.6 days).
The month with the least rainy days is January (5.2 days).
Average snowfall in August
Castle Grove, IA
- Average snowfall in August: 0"
The month with the highest snowfall is January (5.04").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in August
Castle Grove, IA
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is January (12.1 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
Castle Grove, IA
- Average daylight in August: 13h and 5min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in August: 9h and 5min
The months with the most sunshine are July and August (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days in August
Castle Grove, IA
- Average sunshine days in August: 16.7 days
The month with the most sunshine days is September (17 days).
The month with the least sunshine days is June (10.5 days).
Average UV index in August
Castle Grove, IA
- Average UV index in August: 5
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in August
Castle Grove, IA
- Average cloud cover in August: 30
The month with the most cloud cover is January (Cloud cover 60).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in August
Castle Grove, IA
- Average visibility in August: 6mi
The months with the highest visibility are February, March, April, May, June, August, September, October, November and December (6mi).
The months with the lowest visibility are January and July (5mi).
Castle Grove, Iowa, USA
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