Osoyoos has a semi-arid climate, characterized by hot, dry summers and mild winters. It is one of the warmest places in Canada, with average summer temperatures often reaching 30°C (86°F). Winters are mild with temperatures rarely dropping below freezing.

The best time to visit Osoyoos is from late spring to early fall (May to September). During this period, the weather is warm and sunny, ideal for outdoor activities like hiking, swimming, and wine tasting.

In the summer, average daytime temperatures in Osoyoos range from 25°C to 30°C (77°F to 86°F). Heatwaves can occasionally push temperatures above 35°C (95°F). For more information, please check out the Weather section.

Osoyoos receives an average annual rainfall of about 300 mm (12 inches). The area experiences low precipitation compared to other regions in Canada, contributing to its desert-like environment.

Snowfall in Osoyoos is rare and minimal. The area averages about 5.4 cm (2.1 inches) of snow per year, typically occurring in brief periods during the winter months.

Winter temperatures in Osoyoos are mild, with daytime highs averaging around 5°C to 10°C (41°F to 50°F). Nighttime temperatures can occasionally drop below freezing, but extended cold spells are uncommon.

Osoyoos can experience occasional heatwaves in the summer, with temperatures exceeding 35°C (95°F). Wildfire risk is also higher during the hot, dry summer months due to the dry conditions and surrounding forests. For more information, please check out the Weather section.

The warm and sunny climate in Osoyoos makes it perfect for outdoor activities like hiking, boating, and wine tasting. However, during peak summer heat, it's essential to stay hydrated and use sun protection to avoid heat-related illnesses. As well, in recent years the warmer, dry weather has brought on an increased amount of wildfires in the Okanagan. This has resulted in a smokey air, so make sure to check the air quality before travelling to the Okanagan in the summer months.

The UV index in Osoyoos is typically high during the summer months, often reaching levels of 7 or higher. Visitors should use sun protection measures such as sunscreen, hats, and sunglasses to prevent sunburn and other UV-related health issues.

You can check the current weather conditions and forecasts for Osoyoos on websites like Environment Canada, The Weather Network, and Weather Underground. These sites provide up-to-date information on temperature, precipitation, wind, and other weather-related data.