Climate Insights for Bay City

The climate in Bay City is cool. The average annual temperature is 10°C and approximately 1018mm of precipitation falls per year. Bay City receives a notable amount of rainfall throughout the year, including during its driest month. Bay City 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. Bay City experiences heavy snowfall, typically from January through December.

Temperatures in Bay City vary considerably across the year, with a 35°C difference between the coldest and warmest months. The warmest month is July, when average highs reach 28°C and the mean temperature sits around 23°C. The coldest month is January, when overnight lows fall to -7°C and the daily average is -4°C. Daily temperature variation is modest, with an average difference of 8°C between highs and lows. The sharpest temperature change occurs between April and May, with a 10°C shift in average temperatures.

Bay City is a moderately rainy area, receiving approximately 1018mm of precipitation annually, which averages out to around 85mm per month. The wettest month is August, averaging 167mm of rainfall. March and July also tend to see above-average precipitation. The driest month is November, with just 54mm. That's 113mm less than August, the wettest month. Precipitation varies noticeably between seasons, with the second half (July to December) of the year generally seeing more rainfall. Bay City receives heavy snowfall, accumulating around 201cm annually from January through December. The snowiest month is March, with approximately 47cm. Winter travel should account for significant snow cover.

Bay City is relatively calm, with an average annual wind speed of 4km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is December, averaging 6km/h, though still comfortable for most outdoor activities. The calmest conditions occur in August, with average winds dropping to 3km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 3km/h gap between the calmest and windiest months.

It is currently summer in Bay City, which began on June 21, 2026. Bay City 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 July at around 28°C, while the coldest stretch bottoms out in January near -7°C. Autumn is next, beginning on September 23, 2026 — 53 days from now.

The best time to visit Bay City is during June, July and September, when the weather is most comfortable for travellers. During these months, average temperatures hover around 21°C with modest rainfall averaging 78mm 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 table below shows monthly climate averages for Bay City 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.