June Weather in Ottawa, United States

Last updated: June 24, 2025

In June, the average temperature in Ottawa, United States hovers around 23°C (73°F). Expect a minimum of 10°C (49°F) and a warm maximum of 35°C (95°F). With 145 mm (5.7 in) of precipitation spread across 13 days, the air remains notably moist, boasting an average humidity of 82%.

June Temperature in Ottawa

In June in Ottawa, the average temperature is 23°C (73°F), with maximums reaching 35°C (95°F) and minimums dropping as low as 10°C (49°F). This pleasant warm climate makes it an ideal time to explore and enjoy outdoor activities in Ottawa.

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

The chart illustrates June 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, June typically has an average temperature of 23°C (73°F), with highs reaching up to 35°C (95°F) and lows dropping to around 10°C (49°F).

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

June Precipitation in Ottawa

In Ottawa in June, the precipitation amount is 145 mm (5.7 in) over the course of 13 days.

June Precipitation Trends in Ottawa

The chart displays monthly precipitation patterns in Ottawa, with values for each month alongside June’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how June’s conditions compare to those of other months. In Ottawa, June typically receives around 145 mm (5.7 inches) of precipitation spread over approximately 13 days.

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

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Millimeters (mm) Inches (in)

June Humidity in Ottawa

In Ottawa in June, humidity is 82%. With an average temperature of 23°C (73°F), this humidity feels like a warm, sticky embrace, making outdoor activities feel a bit more strenuous but offering a tropical ambiance perfect for leisurely strolls and relaxed sightseeing.

June Average Humidity in Ottawa

This chart illustrates the average monthly humidity levels in Ottawa, with June’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In June, average humidity in Ottawa is approximately 82%, offering insight into how humid the weather typically is during this month.

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

June UV Index in Ottawa

In Ottawa in June, 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 June

The chart shows the monthly maximum UV Index (UVI) for Ottawa in June, 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 June, the maximum UV index in Ottawa typically reaches 10, which falls under the very high exposure category.

Data source: Ottawa June 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 June 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 June’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 June’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