July weather forecast
Knoxville, IA

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Weather in July

July, the same as June, is a moderately hot summer month in Knoxville, Iowa, with temperature in the range of an average high of 82.8°F (28.2°C) and an average low of 65.5°F (18.6°C).

Temperature

Knoxville's temperature records reveal July as the warmest month, marked by average highs of 82.8°F (28.2°C) and lows of 65.5°F (18.6°C).

Heat index

July's heat index is computed to be a tropical 91.4°F (33°C). Implement more preventive measures, heat cramps and heat exhaustion are probable. Heatstroke might result from extended activity.
Heat index specifics point out values are for conditions of shade and a slight breeze. A rise of up to 15 Fahrenheit (8 Celsius) degrees in the heat index could result from direct sunlight.
Note: The heat index, also known as 'feels like' or 'real feel', is a calculation that merges air temperature and relative humidity to depict the sensation of warmth. Elements such as metabolic variations, pregnancy, and physical exertion can influence one's weather perception. Remember, direct sunlight exposure can heighten the heat impact and might increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for babies and toddlers. Young ones generally face higher dangers than adults since they sweat less. Along with their large skin surface area compared totheir small bodies and increased heat production from their activities, the risks are heightened.

Humidity

The average relative humidity in July in Knoxville is 82%.

Rainfall

In Knoxville, in July, it is raining for 13.3 days, with typically 1.34" (34mm) of accumulated precipitation. In Knoxville, Iowa, during the entire year, the rain falls for 115.3 days and collects up to 13.31" (338mm) of precipitation.

Snowfall

In Knoxville, snow does not fall in June through September.

Daylight

In July, the average length of the day is 14h and 49min.
On the first day of the month, sunrise is at 5:43 am and sunset at 8:49 pm. On the last day of July, sunrise is at 6:07 am and sunset at 8:30 pm CDT.

Sunshine

The month with the most sunshine is July, with an average of 10.5h of sunshine.

UV index

June through August, with an average maximum UV index of 6, are months with the highest UV index in Knoxville. A UV Index of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV radiation for average individuals.
Note: A maximum high daily UV index of 6 during July translates into the following directions:
Prevent overexposure. Protection from the sun's harmful effects is needed. The Sun's UV radiation is at its strongest between the hours of 10 a.m. and 4 p.m. Minimize direct exposure to the sun during this period. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit.
Updated: Feb 12, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are the warmest months in Knoxville?

In Knoxville, July is known for its average highest temperatures, reaching a high of 82.8°F (28.2°C) and a low of 65.5°F (18.6°C).

How hot is it in Knoxville in July?

In Knoxville, 82.8°F (28.2°C) is the average high-temperature and 65.5°F (18.6°C) is the average low-temperature during July. The average heat index (a.k.a. 'apparent temperature', 'feels like'), which combines air temperature and relative humidity, in July is computed to be 91.4°F (33°C).

What is the average humidity in July in Knoxville?

The average relative humidity in July in Knoxville is 82%.

How many days does it rain in July in Knoxville?

In Knoxville, in July, it is raining for 13.3 days, with typically 1.34" (34mm) of accumulated precipitation.

When it does not snow in Knoxville?

June through September are months without snowfall.

What is the average length of the day in July in Knoxville?

In Knoxville, Iowa, the average day length in July is 14h and 49min.

When is the sunrise / sunset in July in Knoxville?

On the first day of July in Knoxville, Iowa, sunrise is at 5:43 am and sunset at 8:49 pm. On the last day of the month, sunrise is at 6:07 am and sunset at 8:30 pm CDT.

What month has the most sunshine in Knoxville?

July has the most sunshine of the year in Knoxville, with an average of 10.5h of sunshine.

How long on average sun shines in July in Knoxville?

In Knoxville, the average sunshine duration in July is 10.5h.

What is the month with the highest UV index in Knoxville?

June through August, with an average maximum UV index of 6, are months with the highest UV index.

What is the UV index reading in July in Knoxville?

In July, the average daily maximum UV index in Knoxville is 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in July
Knoxville, IA

Average temperature in July - Knoxville, IA
  • Average high temperature in July: 82.8°F

The warmest month (with the highest average high temperature) is July (82.8°F).
The month with the lowest average high temperature is January (28.6°F).

  • Average low temperature in July: 65.5°F

The month with the highest average low temperature is July (65.5°F).
The coldest month (with the lowest average low temperature) is January (15.1°F).

Average pressure in July
Knoxville, IA

Average pressure in July - Knoxville, IA
  • Average pressure in July: 29.96"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).

Average wind speed in July
Knoxville, IA

Average wind speed in July - Knoxville, IA
  • Average wind speed in July: 7mph

The windiest month (with the highest average wind speed) is January (10.5mph).
The calmest month (with the lowest average wind speed) is August (6.8mph).

Average humidity in July
Knoxville, IA

Average humidity in July - Knoxville, IA
  • Average humidity in July: 82%

The month with the highest relative humidity is January (83%).
The month with the lowest relative humidity is October (71%).

Average rainfall in July
Knoxville, IA

Average rainfall in July - Knoxville, IA
  • Average rainfall in July: 1.34"

The wettest month (with the highest rainfall) is May (2.24").
The driest months (with the least rainfall) are February and December (0.47").

Average rainfall days in July
Knoxville, IA

Average rainfall days in July - Knoxville, IA
  • Average rainfall days in July: 13.3 days

The month with the highest number of rainy days is May (15.3 days).
The month with the least rainy days is February (3.9 days).

Average snowfall in July
Knoxville, IA

Average snowfall in July - Knoxville, IA
  • Average snowfall in July: 0"

The month with the highest snowfall is January (2.24").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in July
Knoxville, IA

Average snowfall days in July - Knoxville, IA
  • Average snowfall days in July: 0 days

The month with the highest number of snowfall days is January (8.7 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in July /
Average sunshine in July
Knoxville, IA

Average daylight in July / Average sunshine in July - Knoxville, IA
  • Average daylight in July: 14h and 5min

The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).

  • Average sunshine in July: 10h and 3min

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 18min).

Average sunshine days in July
Knoxville, IA

Average sunshine days in July - Knoxville, IA
  • Average sunshine days in July: 13.1 days

The months with the most sunshine days are November and December (20.5 days).
The month with the least sunshine days is June (11.6 days).

Average UV index in July
Knoxville, IA

Average UV index in July - Knoxville, IA
  • Average UV index in July: 6

The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is January (UV index 1).

Average cloud cover in July
Knoxville, IA

Average cloud cover in July - Knoxville, IA
  • Average cloud cover in July: 29

The month with the most cloud cover is January (Cloud cover 53).
The months with the least cloud cover are July, August and September (Cloud cover 29).

Average visibility in July
Knoxville, IA

Average visibility in July - Knoxville, IA
  • Average visibility in July: 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).

Knoxville, Iowa, USA

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