Bay County Climate
Bay County, Michigan
Avg Annual Temp
47.5°F
Annual Precip
33.1"
Annual Snowfall
—
Extreme Heat Days
11.55
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Bay County Weather
Four Distinct Seasons Near the Bay
Bay County averages 47.5°F annually, reflecting a classic Great Lakes climate that is cooler than the national median. The proximity to Saginaw Bay provides a slight moderating effect on local weather patterns.
One of Michigan's Warmer Counties
At 47.5°F, Bay County is warmer than the state average of 45.7°F. It experiences more extreme heat days than many northern counties, benefiting from its position in the Saginaw Valley.
Warmer Summers Than Its Neighbors
Bay County is nearly two degrees warmer than Arenac County (45.8°F) to the north. While it shares a similar annual temperature with Barry County, Bay experiences more extreme heat days (12 vs 10).
Hot July Days and Cold Januaries
Bay County sees 12 days of 90°F heat per year, the highest among this group. While snowfall data is missing, the county experiences 33.1 inches of total precipitation and a July average of 71.3°F.
Prepare for Summer Humidity
The 12 days of extreme heat and 71.3°F July average make reliable air conditioning a priority. Residents should also prepare for a 25.1°F winter average by winterizing windows and doors.
Frequently Asked Questions
What is the average temperature in Bay County?
How much rain does Bay County get?
How hot does Bay County get in summer?
How cold are winters in Bay County?
Track your own weather in Bay County
Ambient Weather personal weather stations give you hyperlocal climate data.
Sponsored
Data source: NOAA National Centers for Environmental Information (NCEI), U.S. Climate Normals 1991-2020.
Climate normals are 30-year averages of weather variables computed from 1991 to 2020. Station data is aggregated to county level using spatial averaging. Data is informational only — not a substitute for official National Weather Service forecasts or emergency weather warnings.