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 stands out as Princeton's warmest month, with an average high-temperature of 80.6°F (27°C) and a low-temperature of 64.2°F (17.9°C).Heat index
July's average heat index is estimated at a tropical 86°F (30°C). If one sustains activity during exposure, it could lead to a sense of fatigue, with a chance of heat cramps.When referencing the heat index, its values are suitable for shady environments and light breezes. Exposing to direct sunshine may enhance heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', is an estimation of the warmth sensation when considering humidity levels. The impact of temperature is individual, as people's perception of weather may change based on their body mass, height, and physical activity. By being directly under the sun, it's possible for the felt temperature to increase by 15 Fahrenheit (8 Celsius) degrees. Heat index values are largely significant 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 85%, July is the most humid month in Princeton.Rainfall
In Princeton, in July, during 14.3 rainfall days, 1.77" (45mm) of precipitation is typically accumulated. Throughout the year, there are 130 rainfall days, and 17.64" (448mm) of precipitation is accumulated.Snowfall
May through September are months without snowfall.Daylight
In Princeton, Illinois, the average length of the day in July is 14h and 49min.On the first day of the month, sunrise is at 5:28 am and sunset at 8:35 pm. On the last day of July, sunrise is at 5:52 am and sunset at 8:15 pm CDT.
Sunshine
The months with the most sunshine are June and July, with an average of 9.7h of sunshine.UV index
July is the month with the highest UV index, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV rays for ordinary individuals.Note: The maximum daily UV index of 6 in July converts into the following recommendations:
Avoid overexposure. Fair-skinned individuals can burn in under 20 minutes. Seek shade and limit direct Sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its peak, but be aware that not all shade structures provide complete sun protection. Opt for tightly woven and loose clothing to enhance protection from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What part of the year is the hottest in Princeton?
What is the usual temperature for Princeton in July?
What is the most humid month?
What is the average humidity in July?
How many days does it rain in July?
When it does not snow?
What is the average length of the day in July?
When are sunrise and sunset in July?
What are the months with the most sunshine?
How long on average sun shines in July in Princeton?
When is the highest UV index?
What is the UV index intensity in July?
Average temperature in July
Princeton, IL
- Average high temperature in July: 80.6°F
The warmest month (with the highest average high temperature) is July (80.6°F).
The month with the lowest average high temperature is January (28.8°F).
- Average low temperature in July: 64.2°F
The month with the highest average low temperature is July (64.2°F).
The coldest month (with the lowest average low temperature) is January (16.5°F).
Average pressure in July
Princeton, 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
Princeton, IL
- Average wind speed in July: 6.6mph
The windiest month (with the highest average wind speed) is April (10.5mph).
The calmest month (with the lowest average wind speed) is August (6.4mph).
Average humidity in July
Princeton, IL
- Average humidity in July: 85%
The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is October (72%).
Average rainfall in July
Princeton, IL
- Average rainfall in July: 1.77"
The wettest month (with the highest rainfall) is May (2.91").
The driest month (with the least rainfall) is January (0.75").
Average rainfall days in July
Princeton, IL
- Average rainfall days in July: 14.3 days
The month with the highest number of rainy days is May (17 days).
The month with the least rainy days is February (4.5 days).
Average snowfall in July
Princeton, IL
- Average snowfall in July: 0"
The month with the highest snowfall is January (2.09").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in July
Princeton, IL
- Average snowfall days in July: 0 days
The month with the highest number of snowfall days is January (10.4 days).
The months with the least snowfall days are May, June, July and August (0 days).
Average daylight in July /
Average sunshine in July
Princeton, 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 12min).
- Average sunshine in July: 9h and 4min
The months with the most sunshine are June and July (Average sunshine: 9h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days in July
Princeton, IL
- Average sunshine days in July: 12.9 days
The month with the most sunshine days is November (19.5 days).
The month with the least sunshine days is June (11.8 days).
Average UV index in July
Princeton, IL
- 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
Princeton, IL
- Average cloud cover in July: 34
The month with the most cloud cover is January (Cloud cover 60).
The month with the least cloud cover is September (Cloud cover 32).
Average visibility in July
Princeton, 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).
Princeton, Illinois, USA
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