Climate Insights for Grand Falls-Windsor

The climate in Grand Falls-Windsor is cool. The average annual temperature is 5°C and approximately 1168mm of precipitation falls per year. Grand Falls-Windsor receives a notable amount of rainfall throughout the year, including during its driest month. Grand Falls-Windsor is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: August, July, June. The coldest months are February, January, March, when temperatures can drop to -11°C. Grand Falls-Windsor experiences heavy snowfall, typically from January through December.

Temperatures in Grand Falls-Windsor vary considerably across the year, with a 34°C difference between the coldest and warmest months. August is the warmest month, though highs remain moderate at 23°C with a mean of 18°C. The coldest month is February, when overnight lows fall to -11°C and the daily average is -7°C. On average, daily temperatures fluctuate by about 9°C between overnight lows and afternoon highs. The sharpest temperature change occurs between May and June, with a 6°C shift in average temperatures.

Grand Falls-Windsor is a moderately rainy area, receiving approximately 1168mm of precipitation annually, which averages out to around 97mm per month. The wettest month is November, averaging 128mm of rainfall. March and January also tend to see above-average precipitation. The driest month is July, with just 80mm. That's 48mm less than November, the wettest month. Rainfall is relatively evenly distributed throughout the year, so there is no pronounced dry or wet season to plan around. Grand Falls-Windsor receives heavy snowfall, accumulating around 287cm annually from January through December. The snowiest month is March, with approximately 63cm. Winter travel should account for significant snow cover.

Grand Falls-Windsor is mildly breezy, with an average annual wind speed of 19km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is February, averaging 22km/h, noticeable enough to affect lighter outdoor activities. The calmest conditions occur in August, with average winds dropping to 17km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 5km/h between the calmest and windiest months. Wind tends to be stronger during winter months, driven by seasonal pressure systems. The seasonal averages break down to 21km/h in winter, 20km/h in spring, 17km/h in summer, 19km/h in autumn.

It is currently spring in Grand Falls-Windsor, which began on March 20, 2026. Grand Falls-Windsor is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in August at around 23°C, while the coldest stretch bottoms out in February near -11°C. Summer is next, beginning on June 21, 2026 — 89 days from now.

The best time to visit Grand Falls-Windsor is during July and August, when the weather is most comfortable for travellers. During these months, average temperatures hover around 17°C with modest rainfall averaging 81mm per month. By contrast, February can be quite cold with temperatures dropping to -11°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 Grand Falls-Windsor 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. Snow is measured in centimetres (cm) and reflects average monthly snowfall accumulation. 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.