August weather forecastPrinceton, IA
August
Weather in August
The last month of the summer, August, is another warm month in Princeton, Iowa, with an average temperature fluctuating between 80.1°F (26.7°C) and 61.9°F (16.6°C).Temperature
Princeton observes a minor difference in average high-temperatures between July's 80.4°F (26.9°C) and August's 80.1°F (26.7°C). Princeton's nighttime temperature in August drops to an average of 61.9°F (16.6°C).Humidity
In Princeton, the average relative humidity in August is 81%.Rainfall
In Princeton, in August, during 13.5 rainfall days, 1.89" (48mm) of precipitation is typically accumulated. Throughout the year, there are 146.6 rainfall days, and 28.86" (733mm) of precipitation is accumulated.Snowfall
In Princeton, snow does not fall in May through September.Daylight
In Princeton, the average length of the day in August is 13h and 48min.On the first day of August, sunrise is at 5:56 am and sunset at 8:18 pm. On the last day of the month, sunrise is at 6:27 am and sunset at 7:35 pm CDT.
Sunshine
With an average of 10h of sunshine, August has the most sunshine of the year.UV index
The average daily maximum UV index in August is 5. A UV Index value of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for ordinary individuals.Note: The UV index of 5 in August translates into these instructions:
Exercise prevention - Protecting skin and eyes from harm is required. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
Princeton, IA
- Average high temperature in August: 80.1°F
The warmest month (with the highest average high temperature) is July (80.4°F).
The month with the lowest average high temperature is January (26.8°F).
- Average low temperature in August: 61.9°F
The month with the highest average low temperature is July (64.2°F).
The coldest month (with the lowest average low temperature) is January (14.4°F).
Average pressure in August
Princeton, 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 (29.91"Hg).
Average wind speed in August
Princeton, IA
- Average wind speed in August: 6.6mph
The windiest month (with the highest average wind speed) is April (10.4mph).
The calmest months (with the lowest average wind speed) are July and August (6.6mph).
Average humidity in August
Princeton, 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 (73%).
Average rainfall in August
Princeton, IA
- Average rainfall in August: 1.89"
The wettest month (with the highest rainfall) is May (4.45").
The driest months (with the least rainfall) are January and February (1.34").
Average rainfall days in August
Princeton, IA
- Average rainfall days in August: 13.5 days
The month with the highest number of rainy days is May (18 days).
The month with the least rainy days is February (5.5 days).
Average snowfall in August
Princeton, IA
- Average snowfall in August: 0"
The month with the highest snowfall is January (4.8").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in August
Princeton, IA
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is January (12.3 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
Princeton, 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: 10h
The month with the most sunshine is August (Average sunshine: 10h).
The month with the least sunshine is January (Average sunshine: 4h).
Average sunshine days in August
Princeton, IA
- Average sunshine days in August: 15.4 days
The month with the most sunshine days is November (18 days).
The month with the least sunshine days is June (10.3 days).
Average UV index in August
Princeton, 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
Princeton, IA
- Average cloud cover in August: 30
The month with the most cloud cover is January (Cloud cover 58).
The months with the least cloud cover are August and September (Cloud cover 30).
Average visibility in August
Princeton, 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).
