July Weather in Ottawa, United States

Last updated: June 24, 2025

In July, the average temperature in Ottawa, United States hovers around 24°C (76°F), providing a pleasant atmosphere. Expect minimums of 14°C (57°F) and maximums reaching up to 34°C (93°F), showcasing a wide range of daily conditions. Additionally, this month sees an average precipitation of 101 mm (4.0 in) spread across 12 days, resulting in a humidity level of 80%, which contributes to a lush and vibrant environment.

July Temperature in Ottawa

In July in Ottawa, the average temperature is 24°C (76°F). Maximums can reach 34°C (93°F), and minimums can be as low as 14°C (57°F). This pleasant weather makes Ottawa an ideal destination for travelers seeking comfort and a variety of outdoor activities.

July Weather in Ottawa: Daily Temperature Highs, Lows, and Averages

The chart illustrates July temperature patterns in Ottawa, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Ottawa, July typically has an average temperature of 24°C (76°F), with highs reaching up to 34°C (93°F) and lows dropping to around 14°C (57°F).

Data source: Temperature data for Ottawa generated using information from the Copernicus Climate Change Service.

July Precipitation in Ottawa

In Ottawa in July, the precipitation amount is 101 mm (4.0 in) spread over 12 days.

July Precipitation Trends in Ottawa

The chart displays monthly precipitation patterns in Ottawa, with values for each month alongside July’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how July’s conditions compare to those of other months. In Ottawa, July typically receives around 101 mm (4.0 inches) of precipitation spread over approximately 12 days.

Data source: Precipitation data for July generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

July Humidity in Ottawa

In Ottawa in July humidity is 80%. With an average temperature of 24°C (76°F), this humidity feels like a warm, sticky embrace that can make exploring outdoors quite draining, so it's essential to stay hydrated and take breaks in the shade while traveling.

July Average Humidity in Ottawa

This chart illustrates the average monthly humidity levels in Ottawa, with July’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In July, average humidity in Ottawa is approximately 80%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for July generated using information from the Copernicus Climate Change Service.

July UV Index in Ottawa

In Ottawa in July, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Ottawa.

Maximum UV Index Levels in Ottawa for July

The chart shows the monthly maximum UV Index (UVI) for Ottawa in July, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In July, the maximum UV index in Ottawa typically reaches 10, which falls under the very high exposure category.

Data source: Ottawa July UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

How July Weather in Ottawa Compares to Other Months

Weather in Ottawa varies notably across the year, with each month offering distinct climate conditions. This page compares July’s weather to other months in Ottawa, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Ottawa, showing how July’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-3°C (26°F)	62 mm (2.5 inches)	82%	moderate
February Weather	-2°C (28°F)	66 mm (2.6 inches)	83%	moderate
March Weather	5°C (41°F)	93 mm (3.7 inches)	84%	high
April Weather	10°C (50°F)	117 mm (4.6 inches)	85%	very high
May Weather	17°C (63°F)	165 mm (6.5 inches)	79%	very high
June Weather	23°C (73°F)	145 mm (5.7 inches)	82%	very high
July Weather	24°C (76°F)	101 mm (4.0 inches)	80%	very high
August Weather	23°C (74°F)	87 mm (3.4 inches)	81%	very high
September Weather	20°C (69°F)	91 mm (3.6 inches)	80%	very high
October Weather	13°C (56°F)	134 mm (5.3 inches)	82%	high
November Weather	4°C (40°F)	57 mm (2.2 inches)	88%	moderate
December Weather	1°C (34°F)	55 mm (2.2 inches)	84%	low