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June Weather in Oshawa, Canada

Last updated: June 18, 2025

In Oshawa, Canada, the average temperature in June hovers around 19°C (66°F). Expect a minimum of 5°C (41°F) and a maximum of 31°C (88°F), making this month quite varied in its warmth. With an average humidity of 79%, it feels fairly muggy, while precipitation measures up to 90 mm (3.5 in) over 11 days. Get ready for a mix of sunny and rainy moments throughout the month!

June Temperature in Oshawa

In June in Oshawa, the average temperature is 19°C (66°F). Maximums can reach 31°C (88°F), while minimums can drop to as low as 5°C (41°F). Pack versatile clothing to enjoy the varying temperatures while exploring this destination.

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

The chart illustrates June temperature patterns in Oshawa, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Oshawa, June typically has an average temperature of 19°C (66°F), with highs reaching up to 31°C (88°F) and lows dropping to around 5°C (41°F).
JanFebMarAprMayJunJulAugSepOctNovDec232432435566727063513729
Data source: Temperature data for Oshawa generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

June Precipitation in Oshawa

In Oshawa in June, the total precipitation amounts to 90 mm (3.5 in) over the course of 11 days.

June Precipitation Trends in Oshawa

The chart displays monthly precipitation patterns in Oshawa, 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 Oshawa, June typically receives around 90 mm (3.5 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec65696211298909310873998375
Data source: Precipitation data for June generated using information from the Copernicus Climate Change Service.
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June Humidity in Oshawa

In Oshawa in June humidity is 79%. With an average temperature of 19°C (66°F), this humidity feels like a warm embrace, making it feel much warmer than the actual temperature and creating a heavy, sticky atmosphere that can be a bit uncomfortable for traveling.

June Average Humidity in Oshawa

This chart illustrates the average monthly humidity levels in Oshawa, 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 Oshawa is approximately 79%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%91%88%88%82%80%77%72%76%83%88%87%
Data source: Humidity data for June generated using information from the Copernicus Climate Change Service.

June UV Index in Oshawa

In Oshawa 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 Oshawa.

Maximum UV Index Levels in Oshawa for June

The chart shows the monthly maximum UV Index (UVI) for Oshawa 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 Oshawa typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2458910997532
Data source: Oshawa 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 Oshawa Compares to Other Months

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

This table compares monthly weather conditions in Oshawa, showing how June’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-5°C (23°F)65 mm (2.5 inches)91%low
February Weather-4°C (24°F)69 mm (2.7 inches)91%moderate
March Weather0°C (32°F)62 mm (2.4 inches)88%moderate
April Weather6°C (43°F)112 mm (4.4 inches)88%very high
May Weather13°C (56°F)98 mm (3.9 inches)82%very high
June Weather19°C (66°F)90 mm (3.5 inches)79%very high
July Weather22°C (72°F)92 mm (3.6 inches)77%very high
August Weather21°C (70°F)108 mm (4.2 inches)72%very high
September Weather17°C (63°F)73 mm (2.9 inches)76%high
October Weather11°C (51°F)99 mm (3.9 inches)83%moderate
November Weather3°C (37°F)83 mm (3.2 inches)88%moderate
December Weather-2°C (29°F)75 mm (2.9 inches)87%low

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