August weather forecastHarlan, IA
August
Weather in August
August, the last month of the summer in Harlan, is another warm month, with an average temperature varying between 62.1°F (16.7°C) and 80.2°F (26.8°C).Temperature
The unfolding of August shows an average high-temperature of a still warm 80.2°F (26.8°C), indicating a slight variance from July's 82.6°F (28.1°C). Nighttime temperature in Harlan dips to a mean of 62.1°F (16.7°C) during August.Humidity
In Harlan, Iowa, the average relative humidity in August is 79%.Rainfall
In Harlan, Iowa, in August, it is raining for 12.3 days, with typically 1.93" (49mm) of accumulated precipitation. Throughout the year, in Harlan, there are 113.5 rainfall days, and 15.71" (399mm) of precipitation is accumulated.Snowfall
June through September are months without snowfall.Daylight
In August, the average length of the day in Harlan is 13h and 48min.On the first day of the month, sunrise is at 6:16 am and sunset at 8:38 pm. On the last day of August, sunrise is at 6:47 am and sunset at 7:55 pm CDT.
Sunshine
The average sunshine in August is 9.8h.UV index
The months with the highest UV index in Harlan are June through August, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV rays for the average person.Note: During August, 6 as the daily maximum UV index converts into the following advice:
Take precautions and utilize sun safety practices. Protection against skin and eye damage is required. Stay in the shade and limit direct sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its strongest. Remember, however, that not all shade structures provide full sun protection. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
Harlan, IA
- Average high temperature in August: 80.2°F
The warmest month (with the highest average high temperature) is July (82.6°F).
The month with the lowest average high temperature is January (27.3°F).
- Average low temperature in August: 62.1°F
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (14.5°F).
Average pressure in August
Harlan, IA
- Average pressure in August: 29.96"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed in August
Harlan, IA
- Average wind speed in August: 7.4mph
The windiest month (with the highest average wind speed) is April (10.9mph).
The calmest month (with the lowest average wind speed) is July (7.2mph).
Average humidity in August
Harlan, IA
- Average humidity in August: 79%
The month with the highest relative humidity is January (83%).
The month with the lowest relative humidity is October (68%).
Average rainfall in August
Harlan, IA
- Average rainfall in August: 1.93"
The wettest month (with the highest rainfall) is June (2.64").
The driest month (with the least rainfall) is January (0.43").
Average rainfall days in August
Harlan, IA
- Average rainfall days in August: 12.3 days
The month with the highest number of rainy days is June (16.1 days).
The month with the least rainy days is February (2.8 days).
Average snowfall in August
Harlan, IA
- Average snowfall in August: 0"
The month with the highest snowfall is February (2.09").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in August
Harlan, IA
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is January (8.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in August /
Average sunshine in August
Harlan, IA
- Average daylight in August: 13h and 48min
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 48min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 30min).
Average sunshine days in August
Harlan, IA
- Average sunshine days in August: 15.5 days
The month with the most sunshine days is December (21.6 days).
The month with the least sunshine days is June (11.4 days).
Average UV index in August
Harlan, IA
- Average UV index in August: 6
The months with the highest UV index are June, July and August (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
Harlan, IA
- Average cloud cover in August: 30
The month with the most cloud cover is January (Cloud cover 52).
The month with the least cloud cover is July (Cloud cover 27).
Average visibility in August
Harlan, IA
- 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).
