July weather forecast
Lafayette, IL

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Weather in July

July, the same as June, is another warm summer month in Lafayette, Illinois, with temperature in the range of an average high of 81°F (27.2°C) and an average low of 64.6°F (18.1°C).

Temperature

July stands out as Lafayette's warmest month, with an average high-temperature of 81°F (27.2°C) and a low-temperature of 64.6°F (18.1°C).

Heat index

The heat index value for July is calculated to be a tropical 87.8°F (31°C). Uninterrupted activity during exposure could lead to a sense of exhaustion, possibly causing heat cramps.
Be advised, the heat index considers values for conditions in shade and with a light breeze. The presence of direct sunlight can raise the heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is achieved by amalgamating air temperature with the relative humidity readings. Elements of metabolic variation, physical activity, and clothing contribute to the effect of temperature on an individual. Direct exposure to sun rays can potentially augment the heat sensation, elevating the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. Children often miss understanding the importance of rest and rehydration. Thirst usually appears late during dehydration - therefore, maintaining hydration, particularly during long physical activities, is essential.

Humidity

With an average relative humidity of 84%, July is the most humid month.

Rainfall

In July, the rain falls for 17.1 days. Throughout July, 2.87" (73mm) of precipitation is accumulated. In Lafayette, during the entire year, the rain falls for 147.2 days and collects up to 29.17" (741mm) of precipitation.

Snowfall

May through September are months without snowfall.

Daylight

The average length of the day in July is 14h and 47min.
On the first day of the month, sunrise is at 5:31 am and sunset at 8:36 pm. On the last day of July, sunrise is at 5:55 am and sunset at 8:17 pm CDT.

Sunshine

The months with the most sunshine are June and July, with an average of 10h of sunshine.

UV index

June and July, with an average maximum UV index of 6, are months with the highest UV index. A UV Index value of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV rays for the average person.
Note: The UV index of 6 during July leads to these advisories:
Inhibit overexposure. Warding off sun damage is of utmost importance. Remember that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. Make an effort to avoid direct sun exposure during these hours. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days.
Updated: Jul 21, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the warmest month?

July, known for its average high temperature of 81°F (27.2°C) and an average low temperature of 64.6°F (18.1°C), is the warmest month.

What are the temperatures in July?

The high-temperature, in July, in Lafayette, is 81°F (27.2°C), while the low-temperature averages to 64.6°F (18.1°C). The average heat index (a.k.a. 'real feel', 'apparent temperature'), which calculates the temperature value influenced by the moisture in the air, in July is calculated to be 87.8°F (31°C).

What is the most humid month in Lafayette?

With an average relative humidity of 84%, July is the most humid month.

What is the average humidity in July in Lafayette?

In July, the average relative humidity is 84%.

How much does it rain in July?

In July, the rain falls for 17.1 days. Throughout July, 2.87" (73mm) of precipitation is accumulated.

When it does not snow?

In Lafayette, snow does not fall in May through September.

What is the average length of the day in July?

In Lafayette, Illinois, the average day length in July is 14h and 47min.

When is the sunrise / sunset in July?

In July, on the first day of the month, sunrise is at 5:31 am and sunset at 8:36 pm. On the last day of the month, sunrise is at 5:55 am and sunset at 8:17 pm CDT.

What is the month with the most sunshine?

The months with the most sunshine are June and July, with an average of 10h of sunshine.

How long on average sun shines in July?

In July, the average sunshine duration is 10h.

What is the month with the highest UV index?

June and July, with an average maximum UV index of 6, are months with the highest UV index.

What is the UV index intensity in July?

The average daily maximum UV index in July is 6. A UV Index value of 6 to 7 symbolizes a high health threat from unprotected exposure to 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
Lafayette, IL

Average temperature in July - Lafayette, IL
  • Average high temperature in July: 81°F

The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (28.8°F).

  • Average low temperature in July: 64.6°F

The month with the highest average low temperature is July (64.6°F).
The coldest month (with the lowest average low temperature) is January (16.7°F).

Average pressure in July
Lafayette, IL

Average pressure in July - Lafayette, IL
  • Average pressure in July: 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 July
Lafayette, IL

Average wind speed in July - Lafayette, IL
  • Average wind speed in July: 6.7mph

The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest month (with the lowest average wind speed) is August (6.6mph).

Average humidity in July
Lafayette, IL

Average humidity in July - Lafayette, IL
  • Average humidity in July: 84%

The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (72%).

Average rainfall in July
Lafayette, IL

Average rainfall in July - Lafayette, IL
  • Average rainfall in July: 2.87"

The wettest month (with the highest rainfall) is May (4.45").
The driest months (with the least rainfall) are January and December (1.42").

Average rainfall days in July
Lafayette, IL

Average rainfall days in July - Lafayette, IL
  • Average rainfall days in July: 17.1 days

The month with the highest number of rainy days is May (18.3 days).
The month with the least rainy days is February (5.6 days).

Average snowfall in July
Lafayette, IL

Average snowfall in July - Lafayette, IL
  • Average snowfall in July: 0"

The month with the highest snowfall is January (3.66").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in July
Lafayette, IL

Average snowfall days in July - Lafayette, IL
  • Average snowfall days in July: 0 days

The month with the highest number of snowfall days is January (11.4 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
Lafayette, IL

Average daylight in July / Average sunshine in July - Lafayette, IL
  • 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 0min

The months with the most sunshine are June and July (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).

Average sunshine days in July
Lafayette, IL

Average sunshine days in July - Lafayette, IL
  • Average sunshine days in July: 10.6 days

The month with the most sunshine days is November (18 days).
The month with the least sunshine days is June (10.2 days).

Average UV index in July
Lafayette, IL

Average UV index in July - Lafayette, IL
  • Average UV index in July: 6

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 July
Lafayette, IL

Average cloud cover in July - Lafayette, IL
  • Average cloud cover in July: 32

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 July
Lafayette, IL

Average visibility in July - Lafayette, IL
  • Average visibility in July: 5mi

The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are July and August (5mi).

Lafayette, Illinois, USA

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