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 tends to be the warmest month, with temperatures averaging a daily high of 81°F (27.2°C) and a low of 64.2°F (17.9°C).Heat index
For most parts of July, the heat index is appraised at a tropical 87.8°F (31°C). Continuing activity during long-lasting exposure might induce tiredness and result in heat cramps.Consider that heat index readings are for situations in the shade and light wind. The heat index values could be amplified by up to 15 Fahrenheit (8 Celsius) degrees in direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', reflects the feeling of heat when considering both air temperature and humidity. Elements such as metabolic variations, being pregnant, and physical activity can impact one's weather perception. When directly under the sun, the weather's impact can intensify, possibly boosting the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.
Humidity
July is the most humid month in Ottawa, with an average relative humidity of 85%.Rainfall
In July, the rain falls for 19.9 days. Throughout July, 3.7" (94mm) of precipitation is accumulated. In Ottawa, during the entire year, the rain falls for 166.3 days and collects up to 35.35" (898mm) of precipitation.Snowfall
In Ottawa, snow does not fall in May through September.Daylight
In Ottawa, the average length of the day in July is 14h and 49min.On the first day of the month, sunrise is at 5:26 am and sunset at 8:32 pm. On the last day of July, sunrise is at 5:50 am and sunset at 8:13 pm CDT.
Sunshine
In Ottawa, the average sunshine in July is 9.6h.UV index
The months with the highest UV index are June and July, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high health hazard from exposure to the Sun's UV rays for the average person.Note: During July, 6 as the daily maximum UV index converts into the following advice:
Take precautions against overexposure. Protection against sun damage is needed. Try to minimize direct Sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Also note that objects like parasols or canopies might not provide complete sun protection. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days.
Frequently asked questions
What time of the year is the hottest in Ottawa?
What is the average July temperature in Ottawa?
What is the most humid month in Ottawa?
What is the average humidity in July in Ottawa?
How many days does it rain in July in Ottawa?
When it does not snow in Ottawa?
How many hours of daylight does Ottawa have in July?
When is the sunrise / sunset in July in Ottawa?
How long on average sun shines in July in Ottawa?
What is the month with the highest UV index in Ottawa?
How high is the UV index in July in Ottawa?
Average temperature in July
Ottawa, 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 (29.1°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 (17.2°F).
Average pressure in July
Ottawa, 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 (29.92"Hg).
Average wind speed in July
Ottawa, IL
- Average wind speed in July: 6.3mph
The windiest month (with the highest average wind speed) is April (10.2mph).
The calmest month (with the lowest average wind speed) is August (6.2mph).
Average humidity in July
Ottawa, 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
Ottawa, IL
- Average rainfall in July: 3.7"
The wettest month (with the highest rainfall) is May (5").
The driest month (with the least rainfall) is November (1.81").
Average rainfall days in July
Ottawa, IL
- Average rainfall days in July: 19.9 days
The month with the highest number of rainy days is July (19.9 days).
The month with the least rainy days is February (6.2 days).
Average snowfall in July
Ottawa, IL
- Average snowfall in July: 0"
The month with the highest snowfall is February (5.08").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in July
Ottawa, IL
- Average snowfall days in July: 0 days
The month with the highest number of snowfall days is January (12.9 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
Ottawa, 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 month with the most sunshine is June (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days in July
Ottawa, IL
- Average sunshine days in July: 7.2 days
The month with the most sunshine days is November (17 days).
The month with the least sunshine days is July (7.2 days).
Average UV index in July
Ottawa, IL
- 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
Ottawa, IL
- Average cloud cover in July: 35
The month with the most cloud cover is January (Cloud cover 59).
The month with the least cloud cover is September (Cloud cover 32).
Average visibility in July
Ottawa, IL
- Average visibility in July: 5mi
The months with the highest visibility are March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are January, February, July and August (5mi).
Ottawa, Illinois, USA
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