Climate Insights for Saint-Joseph

The climate in Saint-Joseph is warm and mild. The average annual temperature is 19°C and approximately 2383mm of precipitation falls per year. Saint-Joseph receives a notable amount of rainfall throughout the year, including during its driest month. Saint-Joseph is in the Southern Hemisphere. The seasons are reversed — summer runs from December to February, while winter falls between June and August. The summer months are: January, February, March. The coldest months are August, July, September, when temperatures can drop to 15°C.

Saint-Joseph has relatively stable temperatures year-round, staying within a 10°C range. January is the warmest month, though highs remain moderate at 25°C with a mean of 22°C. August is the coolest month, with minimum temperatures around 15°C and an average of 16°C. Daily temperature variation is modest, with an average difference of 4°C between highs and lows. The sharpest temperature change occurs between April and May, with a 2°C shift in average temperatures.

Saint-Joseph is a very wet location, receiving approximately 2383mm of precipitation annually, which averages out to around 199mm per month. The wettest month is January, averaging 413mm of rainfall. February and March also tend to see above-average precipitation. The driest month is September, with just 92mm. That's 320mm less than January, the wettest month. Precipitation varies noticeably between seasons, with the first half (January to June) of the year generally seeing more rainfall.

Saint-Joseph is mildly breezy, with an average annual wind speed of 14km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is June, averaging 16km/h, though still comfortable for most outdoor activities. The calmest conditions occur in November, with average winds dropping to 13km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 3km/h between the calmest and windiest months.

It is currently autumn in Saint-Joseph, which began on March 20, 2026. Saint-Joseph is in the Southern Hemisphere, where the seasons are reversed — spring starts in September, summer in December, autumn in March, and winter in June. The warmest period peaks in January at around 25°C, while the coldest stretch bottoms out in August near 15°C. Winter is next, beginning on June 21, 2026 — 89 days from now.

The best time to visit Saint-Joseph is during September, when the weather is most comfortable for travellers. During these months, average temperatures hover around 17°C with modest rainfall averaging 92mm per month. By contrast, January can be uncomfortably hot with highs reaching 25°C, while August is the coldest period with lows dropping to 15°C. Despite being the best months overall, some rain is still likely — pack a waterproof layer and plan a mix of indoor and outdoor activities.

The table below shows monthly climate averages for Saint-Joseph based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.