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
Keystone experiences a subtle adjustment in high-temperatures to a still moderately hot 79.5°F (26.4°C) with the onset of August, maintaining near parity with July's 80.8°F (27.1°C). Throughout August, the average low-temperature in Keystone records at a refreshing 61.9°F (16.6°C).Humidity
In Keystone, the average relative humidity in August is 81%.Rainfall
In Keystone, Iowa, in August, it is raining for 13.3 days, with typically 2.24" (57mm) of accumulated precipitation. Throughout the year, in Keystone, there are 139 rainfall days, and 29.49" (749mm) of precipitation is accumulated.Snowfall
In Keystone, snow does not fall in June through September.Daylight
In August, the average length of the day is 13h and 49min.On the first day of August in Keystone, sunrise is at 6:03 am and sunset at 8:27 pm. On the last day of the month, sunrise is at 6:34 am and sunset at 7:43 pm CDT.
Sunshine
In Keystone, the average sunshine in August is 9.7h.UV index
In Keystone, the average daily maximum UV index in August is 5. A UV Index estimate of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for the ordinary person.Note: In August, the maximum UV index of 5 translates into these guidelines:
Act with care - Obligation to protect against skin and eye damage is highlighted. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key.
Frequently asked questions
What is the temperature in August in Keystone?
What is the average humidity in August in Keystone?
How much does it rain in Keystone in August?
When it does not snow in Keystone?
What is the average length of the day in August in Keystone?
What time are sunrise and sunset in August in Keystone?
How long on average sun shines in August in Keystone?
What is the UV index intensity in August in Keystone?
Average temperature in August
Keystone, IA
- Average high temperature in August: 79.5°F
The warmest month (with the highest average high temperature) is July (80.8°F).
The month with the lowest average high temperature is January (25.9°F).
- Average low temperature in August: 61.9°F
The month with the highest average low temperature is July (64.4°F).
The coldest month (with the lowest average low temperature) is January (13.5°F).
Average pressure in August
Keystone, IA
- Average pressure in August: 29.97"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in August
Keystone, IA
- Average wind speed in August: 7mph
The windiest month (with the highest average wind speed) is April (10.8mph).
The calmest month (with the lowest average wind speed) is August (7mph).
Average humidity in August
Keystone, IA
- Average humidity in August: 81%
The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is October (72%).
Average rainfall in August
Keystone, IA
- Average rainfall in August: 2.24"
The wettest month (with the highest rainfall) is May (4.61").
The driest month (with the least rainfall) is January (1.18").
Average rainfall days in August
Keystone, IA
- Average rainfall days in August: 13.3 days
The month with the highest number of rainy days is June (19.3 days).
The month with the least rainy days is January (4.5 days).
Average snowfall in August
Keystone, IA
- Average snowfall in August: 0"
The month with the highest snowfall is January (5.24").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in August
Keystone, IA
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is February (10.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in August /
Average sunshine in August
Keystone, 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 4min
The month with the most sunshine is July (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).
Average sunshine days in August
Keystone, IA
- Average sunshine days in August: 15.1 days
The month with the most sunshine days is October (19.2 days).
The month with the least sunshine days is June (8.4 days).
Average UV index in August
Keystone, IA
- Average UV index in August: 5
The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are January, February, October, November and December (UV index 2).
Average cloud cover in August
Keystone, IA
- Average cloud cover in August: 31
The month with the most cloud cover is January (Cloud cover 57).
The month with the least cloud cover is September (Cloud cover 30).
Average visibility in August
Keystone, 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).
Keystone, Iowa, USA
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