Climate Insights for St. Marys

The climate in St. Marys is cool. The average annual temperature is 9°C and approximately 1,076 mm of precipitation falls per year. St. Marys receives a notable amount of rainfall throughout the year, including during its driest month. St. Marys is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: July, August, June. The coldest months are January, February, December, when temperatures can drop to -7°C. Snowfall occurs from January to December, with around 182cm accumulating over the season.The climate in St. Marys is cool. The average annual temperature is 48°F and approximately 42.4 in of precipitation falls per year. St. Marys receives a notable amount of rainfall throughout the year, including during its driest month. St. Marys is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: July, August, June. The coldest months are January, February, December, when temperatures can drop to 19°F. Snowfall occurs from January to December, with around 72in accumulating over the season.

Temperatures in St. Marys vary considerably across the year, with a 34°C difference between the coldest and warmest months. The warmest month is July, when average highs reach 27°C and the mean temperature sits around 21°C. The coldest month is January, when overnight lows fall to -7°C and the daily average is -4°C. On average, daily temperatures fluctuate by about 9°C between overnight lows and afternoon highs. The sharpest temperature change occurs between April and May, with a 7°C shift in average temperatures.Temperatures in St. Marys vary considerably across the year, with a 61°F difference between the coldest and warmest months. The warmest month is July, when average highs reach 80°F and the mean temperature sits around 70°F. The coldest month is January, when overnight lows fall to 19°F and the daily average is 24°F. On average, daily temperatures fluctuate by about 16°F between overnight lows and afternoon highs. The sharpest temperature change occurs between April and May, with a 13°F shift in average temperatures.

St. Marys is a moderately rainy area, receiving approximately 1,076 mm of precipitation annually, which averages out to around 90 mm per month. The wettest month is August, averaging 106 mm of rainfall. June and April also tend to see above-average precipitation. The driest month is September, with just 73 mm. That's 33 mm less than August, the wettest month. Rainfall is relatively evenly distributed throughout the year, so there is no pronounced dry or wet season to plan around. Snowfall is a regular feature from January to December, with around 182cm accumulating over the season. January typically sees the most snow at around 45cm.St. Marys is a moderately rainy area, receiving approximately 42.4 in of precipitation annually, which averages out to around 3.5 in per month. The wettest month is August, averaging 4.2 in of rainfall. June and April also tend to see above-average precipitation. The driest month is September, with just 2.9 in. That's 1.3 in less than August, the wettest month. Rainfall is relatively evenly distributed throughout the year, so there is no pronounced dry or wet season to plan around. Snowfall is a regular feature from January to December, with around 72in accumulating over the season. January typically sees the most snow at around 18in.

St. Marys is mildly breezy, with an average annual wind speed of 13km/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 15km/h, though still comfortable for most outdoor activities. The calmest conditions occur in July, with average winds dropping to 10km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 5km/h gap 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 15km/h in winter, 14km/h in spring, 11km/h in summer, 13km/h in autumn.St. Marys is moderately windy, with an average annual wind speed of 8mph. For context, sustained winds below 7mph are generally light, while anything above 16mph is considered strong. The windiest month is February, averaging 10mph, noticeable enough to affect lighter outdoor activities. The calmest conditions occur in July, with average winds dropping to 6mph, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 4mph gap 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 9mph in winter, 9mph in spring, 7mph in summer, 8mph in autumn.

The best time to visit St. Marys is during July and September, when the weather is most comfortable for travellers. During these months, average temperatures hover around 19°C with modest rainfall averaging 86 mm per month. By contrast, January can be quite cold with temperatures dropping to -7°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 best time to visit St. Marys is during July and September, when the weather is most comfortable for travellers. During these months, average temperatures hover around 66°F with modest rainfall averaging 3.4 in per month. By contrast, January can be quite cold with temperatures dropping to 19°F. 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 St. Marys 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.The table below shows monthly climate averages for St. Marys based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Fahrenheit (°F). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Snow is measured in inches (in) and reflects average monthly snowfall accumulation. Wind speed is the average sustained speed in miles per hour (mph). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.