Granby

Planning your day in Granby? Check out the latest weather data, forecasts, and helpful charts right here to ensure your stay is as comfortable as possible.

The climate in Granby, Canada, is continental, characterized by four distinct seasons. Winters are cold, with average monthly temperatures well below freezing, dropping in January to an average of -8.0°C and nighttime lows of -12.3°C. In contrast, summers are warm and pleasant: in July, the average temperature is around 21.4°C, and daytime highs can reach 25.8°C. Spring and autumn are transitional seasons with gradual changes in temperature.

Precipitation in Granby is distributed fairly evenly throughout the year, averaging between 3 and 5 mm per month. The number of days with precipitation is also relatively constant, ranging from 10 to 16 days monthly. This means some form of precipitation can be expected in any season, without a pronounced rainy season. Travelers should be prepared for changeable weather and have appropriate clothing depending on the time of year.

Winter in Granby is characterized by consistent sub-zero temperatures. In January, the coldest month, daytime highs usually don't exceed -3.8°C, creating a true winter atmosphere. February continues this trend: the average temperature is -6.2°C, with frosty nights reaching lows of -11.2°C, while daytime air warms to only -1.2°C. The first heavy cold sets in by December: an average temperature of about -3.8°C, with nighttime values dropping to -7.4°C and daytime highs hovering around -0.2°C. These conditions are perfect for fans of snowy landscapes and winter sports.

The summer period in Granby brings long-awaited warmth. July is the peak of summer, and even the nights stay pleasantly warm with temperatures around 17.0°C, ideal for evening walks. August also offers warm weather: the average temperature stays at 20.1°C, with the thermometer rising to 24.3°C during the day and dropping to a comfortable 15.9°C at night. June kicks off the summer season with an average temperature of 18.5°C, daytime highs of 23.4°C, and nighttime lows around 13.7°C, offering plenty of opportunities for outdoor recreation.

Transitional seasons in Granby show a gradual shift in temperature. Spring begins with a cool March, where the average temperature is -0.7°C (ranging from -5.0°C at night to 3.6°C during the day). It becomes noticeably warmer in April, averaging 6.2°C (minimum 1.4°C, maximum 11.0°C). May brings true spring warmth: the average temperature reaches 13.9°C, with daytime values up to 19.3°C and nighttime lows around 8.5°C. Autumn starts with a comfortable 16.4°C in September (12.1°C at night, 20.7°C during the day). October brings a chill with an average temperature of 10.5°C (ranging from 6.6°C to 14.4°C). By November, the approach of winter is felt: the average temperature drops to 1.9°C, with nighttime frosts down to -1.5°C and daytime highs around 5.3°C. Throughout the year, the difference between day and night temperatures usually ranges from 7 to 11 degrees, a characteristic feature of the local climate.

In Granby, precipitation peaks in August, averaging about 5 mm. Most other months—including January, February, March, May, September, November, and December—are characterized by lower amounts of around 3 mm. In April, June, July, and October, this figure is about 4 mm.

August also leads in terms of frequency, with an average of 16 days of precipitation. Rainfall is slightly less frequent in June and July (15 days each). The "driest" month in terms of the number of wet days is September (about 10 days). In January, February, March, April, October, November, and December, the number of precipitation days is around 14, while in May it is about 11 days.

Taking the temperature conditions in Granby into account, precipitation during the winter period—from December to March, and likely in November—usually falls as snow. This is because average and minimum temperatures drop below freezing during these months. In the warmer months, from April to October, precipitation is primarily rain. Thus, while precipitation occurs regularly in Granby throughout the year, the total amount is modest, with a slight peak in intensity and frequency in August. This means the city does not experience extreme dry or wet seasons.

When planning a trip to Granby, it is important to consider the significant seasonal variations in weather. Winters here are cold, with average temperatures well below freezing (from -8°C in January to -0.7°C in March) and frequent precipitation, which is likely to be snow. Therefore, if your trip falls between December and March, be sure to pack very warm clothing: thermal underwear, fleece sweaters, an insulated waterproof jacket and pants, a hat, scarf, gloves or mittens, and warm waterproof footwear.

The summer months, from June to August, bring warmth, with average temperatures ranging from 18.5°C to 21.4°C and highs reaching 25.8°C. However, summer also sees the highest amount of precipitation (4-5 mm per month) and the most rainy days (15-16 days). So, in addition to light clothing like t-shirts, shorts, and light trousers, don't forget to bring a raincoat or umbrella. Sunscreen and a hat will also come in handy on sunny days. Comfortable walking shoes are a must any time of year.

Spring (April–May) and autumn (September–November) are transitional seasons with changeable weather. Temperatures in April and November can be quite chilly, while May and September are milder. During these periods, layering is especially important: pack t-shirts, long-sleeved shirts, sweaters or fleeces, and a mid-season jacket, preferably waterproof. Given that precipitation is possible throughout the year (averaging 10–16 wet days per month), having an umbrella or a light raincoat is a useful addition to your luggage in any season.