July weather forecast
Henderson, IA

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Weather in July

July, like June, in Henderson, Iowa, is a moderately hot summer month, with an average temperature ranging between min 65.8°F (18.8°C) and max 83.7°F (28.7°C).

Temperature

Henderson experiences its highest average temperatures in July, reaching a peak of 83.7°F (28.7°C) and a minimum of 65.8°F (18.8°C).

Heat index

The heat index value during July is calculated to be a hot 93.2°F (34°C). Incorporate special precautions, risk of heat exhaustion and heat cramps is substantial. Sustained activity could cause heatstroke.
When assessing, remember that heat index measurements are for light winds and shaded spots. Direct sunlight can potentially boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', is an estimation of the warmth sensation when considering humidity levels. One's perception of weather can be shaped by other factors, involving metabolic differences, pregnancy, and physical exertion. Direct exposure to the sun's rays can enhance the felt temperature, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely vital to babies and toddlers. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it's vital to remain hydrated, particularly during prolonged physical activities.

Humidity

In Henderson, the average relative humidity in July is 79%.

Rainfall

In Henderson, in July, it is raining for 13.7 days, with typically 2.32" (59mm) of accumulated precipitation. Throughout the year, there are 117.2 rainfall days, and 21.77" (553mm) of precipitation is accumulated.

Snowfall

In Henderson, Iowa, snow does not fall in May through September.

Daylight

In July, the average length of the day is 14h and 47min.
On the first day of July, sunrise is at 5:53 am and sunset at 8:58 pm. On the last day of the month, sunrise is at 6:17 am and sunset at 8:38 pm CDT.

Sunshine

With an average of 10.3h of sunshine, July has the most sunshine of the year.

UV index

June through August, with an average maximum UV index of 6, are months with the highest UV index in Henderson. A UV Index reading of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV rays for average individuals.
Note: An average maximum UV index of 6 in July leads to these recommendations:
Undertake precautions and comply with sun safety standards. Protection from skin and eye injury is vital. Avoid direct Sun exposure and stay in the shade between 10 a.m. and 4 p.m., a time when UV radiation is most intense, noting that not all shade structures offer full protection. Opt for tightly woven and loose clothing to enhance protection from the Sun.
Updated: Jul 30, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What month is the hottest?

July, on average, is the warmest month, registering a high temperature of 83.7°F (28.7°C) and a low of 65.8°F (18.8°C).

How hot is it in July?

In Henderson, in July, the average high-temperature is 83.7°F (28.7°C), and the average low-temperature is 65.8°F (18.8°C). In July, the average heat index (a.k.a. 'feels like', 'real feel'), which represents the influence of relative humidity on air temperature, is calculated to be 93.2°F (34°C).

What is the average humidity in July?

In Henderson, the average relative humidity in July is 79%.

How many days does it rain in July?

In Henderson, in July, during 13.7 rainfall days, 2.32" (59mm) of precipitation is typically accumulated.

When it does not snow?

May through September are months without snowfall.

How many hours of daylight does Henderson have in July?

The average day length in July is 14h and 47min.

What time are sunrise and sunset in July?

On the first day of July, sunrise is at 5:53 am and sunset at 8:58 pm. On the last day of the month, sunrise is at 6:17 am and sunset at 8:38 pm CDT.

What month has the most sunshine?

July has the most sunshine of the year, with an average of 10.3h of sunshine.

How long on average sun shines in July?

In Henderson, the average sunshine duration in July is 10.3h.

When is the highest UV index?

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

What is the UV index intensity in July?

In Henderson, the average daily maximum UV index in July is 6. A UV Index value of 6 to 7 symbolizes a high hazard to health from exposure to Sun's UV rays.
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
Henderson, IA

Average temperature in July - Henderson, IA
  • Average high temperature in July: 83.7°F

The warmest month (with the highest average high temperature) is July (83.7°F).
The month with the lowest average high temperature is January (30°F).

  • Average low temperature in July: 65.8°F

The month with the highest average low temperature is July (65.8°F).
The coldest month (with the lowest average low temperature) is January (16.7°F).

Average pressure in July
Henderson, IA

Average pressure in July - Henderson, IA
  • Average pressure in July: 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 July
Henderson, IA

Average wind speed in July - Henderson, IA
  • Average wind speed in July: 6.8mph

The windiest months (with the highest average wind speed) are March and April (10.4mph).
The calmest month (with the lowest average wind speed) is July (6.8mph).

Average humidity in July
Henderson, IA

Average humidity in July - Henderson, IA
  • Average humidity in July: 79%

The month with the highest relative humidity is January (81%).
The month with the lowest relative humidity is October (68%).

Average rainfall in July
Henderson, IA

Average rainfall in July - Henderson, IA
  • Average rainfall in July: 2.32"

The wettest month (with the highest rainfall) is June (4.06").
The driest months (with the least rainfall) are January and February (0.63").

Average rainfall days in July
Henderson, IA

Average rainfall days in July - Henderson, IA
  • Average rainfall days in July: 13.7 days

The month with the highest number of rainy days is May (16.8 days).
The month with the least rainy days is February (2.9 days).

Average snowfall in July
Henderson, IA

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

The month with the highest snowfall is January (2.68").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in July
Henderson, IA

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

The month with the highest number of snowfall days is January (7.9 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
Henderson, IA

Average daylight in July / Average sunshine in July - Henderson, 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 2min

The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 36min).

Average sunshine days in July
Henderson, IA

Average sunshine days in July - Henderson, IA
  • Average sunshine days in July: 14.3 days

The month with the most sunshine days is December (23.1 days).
The month with the least sunshine days is May (12.3 days).

Average UV index in July
Henderson, IA

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

The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, October, November and December (UV index 2).

Average cloud cover in July
Henderson, IA

Average cloud cover in July - Henderson, IA
  • Average cloud cover in July: 27

The month with the most cloud cover is January (Cloud cover 50).
The month with the least cloud cover is July (Cloud cover 27).

Average visibility in July
Henderson, IA

Average visibility in July - Henderson, 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).

Henderson, Iowa, USA

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