Contents
- Weather in July
- Frequently asked questions
- Average temperature in July
- Average pressure in July
- Average wind speed in July
- Average humidity in July
- Average rainfall in July
- Average rainfall days in July
- Average snowfall in July
- Average snowfall days in July
- Average daylight in July
- Average sunshine in July
- Average sunshine days in July
- Average UV index in July
- Average cloud cover in July
- Average visibility in July
Weather in July
Temperature
With average high temperatures of 80.2°F (26.8°C) and lows of 63.7°F (17.6°C), July is the warmest month.Humidity
In Preston, the average relative humidity in July is 84%.Rainfall
In Preston, during July, the rain falls for 16.4 days and regularly aggregates up to 2.99" (76mm) of precipitation. In Preston, during the entire year, the rain falls for 143.3 days and collects up to 29.76" (756mm) of precipitation.Snowfall
May through September are months without snowfall in Preston.Daylight
The average length of the day in July in Preston is 14h and 53min.On the first day of the month, sunrise is at 5:30 am and sunset at 8:41 pm. On the last day of July, in Preston, sunrise is at 5:54 am and sunset at 8:21 pm CDT.
Sunshine
July has the most sunshine of the year in Preston, with an average of 9.9h of sunshine.UV index
The month with the highest UV index is July, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV radiation for the average person.Note: A daily maximum UV index of 6 in July translates into the following instructions:
Implement precautions and maintain sun safety methods. Avoidance of sunburn is demanded. Make an effort to avoid direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation, and note that objects like parasols or canopies might not offer full sun protection. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What time of the year is the hottest in Preston?
What are the temperatures in Preston in July?
What is the average humidity in July in Preston?
How many days does it rain in July in Preston?
When it does not snow in Preston?
How many hours of daylight does Preston have in July?
When are sunrise and sunset in July in Preston?
What month has the most sunshine in Preston?
How many hours of sunshine does Preston have in July?
When is the highest UV index in Preston?
What is the UV index intensity in July in Preston?
Average temperature in July
Preston, IA
- Average high temperature in July: 80.2°F
The warmest month (with the highest average high temperature) is July (80.2°F).
The month with the lowest average high temperature is January (25.9°F).
- Average low temperature in July: 63.7°F
The month with the highest average low temperature is July (63.7°F).
The coldest month (with the lowest average low temperature) is January (13.3°F).
Average pressure in July
Preston, IA
- Average pressure in July: 29.96"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 July
Preston, IA
- Average wind speed in July: 6.8mph
The windiest month (with the highest average wind speed) is April (10.5mph).
The calmest months (with the lowest average wind speed) are July and August (6.8mph).
Average humidity in July
Preston, IA
- Average humidity in July: 84%
The month with the highest relative humidity is January (86%).
The month with the lowest relative humidity is October (74%).
Average rainfall in July
Preston, IA
- Average rainfall in July: 2.99"
The wettest month (with the highest rainfall) is May (4.53").
The driest month (with the least rainfall) is January (1.34").
Average rainfall days in July
Preston, IA
- Average rainfall days in July: 16.4 days
The month with the highest number of rainy days is May (18.7 days).
The month with the least rainy days is February (5.3 days).
Average snowfall in July
Preston, IA
- Average snowfall in July: 0"
The month with the highest snowfall is January (5.2").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in July
Preston, IA
- Average snowfall days in July: 0 days
The month with the highest number of snowfall days is January (11 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in July /
Average sunshine in July
Preston, IA
- Average daylight in July: 14h 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 July: 9h and 5min
The month with the most sunshine is July (Average sunshine: 9h and 54min).
The months with the least sunshine are January and February (Average sunshine: 3h and 54min).
Average sunshine days in July
Preston, IA
- Average sunshine days in July: 11.1 days
The month with the most sunshine days is November (18.6 days).
The month with the least sunshine days is May (10.2 days).
Average UV index in July
Preston, IA
- Average UV index in July: 6
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in July
Preston, IA
- Average cloud cover in July: 34
The month with the most cloud cover is January (Cloud cover 60).
The months with the least cloud cover are August and September (Cloud cover 31).
Average visibility in July
Preston, IA
- Average visibility in July: 5mi
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).
Preston, Iowa, USA
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