Climate Insights for Bay City

The climate in Bay City is temperate. The average annual temperature is 11°C and approximately 1938mm of precipitation falls per year. January is the wettest month, receiving around 310mm of rainfall. Bay City is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: August, September, July. The coldest months are February, March, January, when temperatures can drop to 6°C. Light snow can occur between January and March.

Bay City sees moderate temperature variation throughout the year, ranging from 6°C to 17°C. August is the warmest month, though highs remain moderate at 17°C with a mean of 16°C. February is the coolest month, with minimum temperatures around 6°C and an average of 8°C. Daily temperature variation is modest, with an average difference of 3°C between highs and lows. The sharpest temperature change occurs between September and October, with a 2°C shift in average temperatures.

Bay City is a fairly wet location, receiving approximately 1938mm of precipitation annually, which averages out to around 162mm per month. The wettest month is January, averaging 310mm of rainfall. November and December also tend to see above-average precipitation. The driest month is August, with just 18mm. That's 292mm less than January, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic. Light snowfall can occur between January and March, totalling around 10cm annually. February is the snowiest month with approximately 6cm.

Bay City is relatively calm, with an average annual wind speed of 5km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is January, averaging 7km/h, though still comfortable for most outdoor activities. The calmest conditions occur in September, with average winds dropping to 4km/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 spring in Bay City, which began on March 20, 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 August at around 17°C, while the coldest stretch bottoms out in February near 6°C. Summer is next, beginning on June 21, 2026 — 1 days from now.

The best time to visit Bay City is during July and August, when the weather is most comfortable for travellers. During these months, average temperatures hover around 15°C with modest rainfall averaging 20mm per month. By contrast, February can be quite cold with temperatures dropping to 6°C. With minimal rainfall expected, you can pack light and plan outdoor activities with confidence.

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.