August weather forecastOnawa Junction, IA
August
Weather in August
The last month of the summer, August, is another warm month in Onawa Junction, Iowa, with an average temperature ranging between max 79.3°F (26.3°C) and min 60.8°F (16°C).Temperature
August commences with an average high-temperature of a still moderately hot 79.3°F (26.3°C), showing little deviation from July's 81.5°F (27.5°C). Onawa Junction records a consistent low-temperature of 60.8°F (16°C) during August nights.Humidity
In Onawa Junction, the average relative humidity in August is 79%.Rainfall
In Onawa Junction, in August, during 13.1 rainfall days, 2.36" (60mm) of precipitation is typically accumulated. In Onawa Junction, during the entire year, the rain falls for 117 days and collects up to 19.84" (504mm) of precipitation.Snowfall
In Onawa Junction, Iowa, snow does not fall in June through September.Daylight
In Onawa Junction, Iowa, the average length of the day in August is 13h and 52min.On the first day of the month, sunrise is at 6:14 am and sunset at 8:42 pm. On the last day of August, in Onawa Junction, sunrise is at 6:46 am and sunset at 7:57 pm CDT.
Sunshine
The average sunshine in August is 9.6h.UV index
In August, the average daily maximum UV index is 5. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for the ordinary person.Note: In August, a daily maximum UV index of 5 leads to the following instructions:
Undertake precautions - Guarding against sun damage is counselled. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
Onawa Junction, IA
- Average high temperature in August: 79.3°F
The warmest month (with the highest average high temperature) is July (81.5°F).
The month with the lowest average high temperature is January (24.4°F).
- Average low temperature in August: 60.8°F
The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (12°F).
Average pressure in August
Onawa Junction, IA
- Average pressure in August: 29.95"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
Onawa Junction, IA
- Average wind speed in August: 7.8mph
The windiest month (with the highest average wind speed) is April (11.2mph).
The calmest month (with the lowest average wind speed) is July (7.6mph).
Average humidity in August
Onawa Junction, IA
- Average humidity in August: 79%
The month with the highest relative humidity is January (86%).
The months with the lowest relative humidity are April and October (68%).
Average rainfall in August
Onawa Junction, IA
- Average rainfall in August: 2.36"
The wettest month (with the highest rainfall) is June (3.15").
The driest month (with the least rainfall) is January (0.55").
Average rainfall days in August
Onawa Junction, IA
- Average rainfall days in August: 13.1 days
The month with the highest number of rainy days is June (17.3 days).
The month with the least rainy days is February (2.6 days).
Average snowfall in August
Onawa Junction, IA
- Average snowfall in August: 0"
The month with the highest snowfall is February (3.19").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in August
Onawa Junction, IA
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is January (9.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in August /
Average sunshine in August
Onawa Junction, IA
- Average daylight in August: 13h and 54min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in August: 9h and 36min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days in August
Onawa Junction, IA
- Average sunshine days in August: 15.8 days
The month with the most sunshine days is November (21.1 days).
The month with the least sunshine days is June (11.1 days).
Average UV index in August
Onawa Junction, IA
- Average UV index in August: 5
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in August
Onawa Junction, IA
- Average cloud cover in August: 31
The month with the most cloud cover is January (Cloud cover 55).
The month with the least cloud cover is July (Cloud cover 28).
Average visibility in August
Onawa Junction, 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).
