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
July, with an average high of 79.7°F (26.5°C) and a low of 63°F (17.2°C), signifies the warmest month of the year.Humidity
In July, the average relative humidity is 83%.Rainfall
In Duncan, during July, the rain falls for 14.6 days and regularly aggregates up to 2.01" (51mm) of precipitation. In Duncan, during the entire year, the rain falls for 127.1 days and collects up to 24.8" (630mm) of precipitation.Snowfall
In Duncan, snow does not fall in June through September.Daylight
The average length of the day in July is 14h and 59min.On the first day of the month, sunrise is at 5:39 am and sunset at 8:58 pm. On the last day of July, in Duncan, sunrise is at 6:05 am and sunset at 8:37 pm CDT.
Sunshine
With an average of 9.8h of sunshine, July has the most sunshine of the year.UV index
The months with the highest UV index are June and July, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high health vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: The daily high UV index of 6 in July translates into this advice:
Stick with precautions and abide by sun safety procedures. Evading sunburn is essential. The Sun's UV radiation is most potent between 10 a.m. and 4 p.m. Try to limit direct exposure to the Sun during this period. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
What month is the hottest?
What are July temperatures?
What is the average humidity in July?
How much does it rain in July?
When it does not snow?
How many hours of daylight does Duncan have in July?
When are sunrise and sunset in July in Duncan?
What month has the most sunshine in Duncan?
How many hours of sunshine does Duncan have in July?
When is the highest UV index?
How high is the UV index in July in Duncan?
Average temperature in July
Duncan, IA
- Average high temperature in July: 79.7°F
The warmest month (with the highest average high temperature) is July (79.7°F).
The month with the lowest average high temperature is January (22.8°F).
- Average low temperature in July: 63°F
The month with the highest average low temperature is July (63°F).
The coldest month (with the lowest average low temperature) is January (10.4°F).
Average pressure in July
Duncan, IA
- Average pressure in July: 29.96"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in July
Duncan, IA
- Average wind speed in July: 7.4mph
The windiest month (with the highest average wind speed) is April (11mph).
The calmest month (with the lowest average wind speed) is July (7.4mph).
Average humidity in July
Duncan, IA
- Average humidity in July: 83%
The month with the highest relative humidity is January (89%).
The month with the lowest relative humidity is October (69%).
Average rainfall in July
Duncan, IA
- Average rainfall in July: 2.01"
The wettest month (with the highest rainfall) is June (3.82").
The driest month (with the least rainfall) is January (0.94").
Average rainfall days in July
Duncan, IA
- Average rainfall days in July: 14.6 days
The month with the highest number of rainy days is June (17.8 days).
The month with the least rainy days is February (2.8 days).
Average snowfall in July
Duncan, IA
- Average snowfall in July: 0"
The month with the highest snowfall is February (5.71").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in July
Duncan, IA
- Average snowfall days in July: 0 days
The month with the highest number of snowfall days is January (13.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in July /
Average sunshine in July
Duncan, IA
- Average daylight in July: 15h and 0min
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 July: 9h and 5min
The month with the most sunshine is July (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in July
Duncan, IA
- Average sunshine days in July: 14.3 days
The month with the most sunshine days is November (18.3 days).
The month with the least sunshine days is June (10.4 days).
Average UV index in July
Duncan, IA
- Average UV index in July: 6
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in July
Duncan, IA
- Average cloud cover in July: 33
The month with the most cloud cover is January (Cloud cover 62).
The months with the least cloud cover are August and September (Cloud cover 32).
Average visibility in July
Duncan, 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).
Duncan, Iowa, USA
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