Bay City receives its highest rainfall in Aug, while humidity peaks during winter months.
🌧️ Wettest:Aug — 91 mm☀️ Driest:Feb — 43 mm
💧 Humidity peaks at 88% in Jan · annual avg 79%
🌍 Climate Summary
Avg Annual Temp:47.7°F
Avg Annual Rainfall:846 mm
Avg Humidity:79%
Data Period:1981 – 2025
Bay City Climate Overview
Bay City has a temperate climate with warm summers and freezing winters.
Temperatures peak in Jul and drop to their lowest in Jan,
while rainfall is highest during summer months.
Humidity remains high throughout the year, especially during winter months, creating cold and damp conditions.
📈 Yearly Trends
The warmest year in Bay City's recorded history was 2012
(avg: 51.6°F),
while the coldest year was 2014
(avg: 43.3°F),
based on annual average temperatures.
📊 Key Climate Trends
🌡️ Bay City's temperature shows a slight warming trend over the past decade
📈 Minimum temperatures show a slight warming trend in recent years
🌧️ Rainfall has decreased in recent years compared to earlier periods
🌡️ Annual Temperature Trend
View Range:
Average annual high/low · Last 10 years · °F
Bay City's temperatures shows a slight warming trend over the past decade.
The highest recorded temperature reached
93.4°F in Jul 1988,
while the lowest dropped to
-19.4°F in Feb 2015.
🌧️ Annual Precipitation
View Range:
Total annual precipitation · Last 10 years · mm/year
Annual rainfall in Bay City shows noticeable variation. Rainfall has decreased in recent years compared to earlier periods.
Based on 45 years of data (1981–2025), Jul is typically the hottest month in Bay City, Michigan, with average high temperatures around 86°F.
What is the coldest month in Bay City?▼
Jan is the coldest month in Bay City, with average low temperatures around 0.1°F.
What is the rainiest month in Bay City?▼
Aug receives the most rainfall with approximately 91 mm, while Feb is the driest with 43 mm.
What was the highest temperature ever recorded in Bay City?▼
The highest recorded temperature was 93.4°F in Jul 1988. This is part of the historical record spanning 1981–2025.
What was the lowest temperature ever recorded in Bay City?▼
The lowest recorded temperature was -19.4°F in Feb 2015.
How many years of data does this page cover?▼
This page covers 45 years of climate data from 1981 to 2025. As new data is added to the database the page automatically reflects the updated coverage.
How much sunlight does Bay City get?▼
Bay City receives the most sunlight in Jun with an average solar radiation of 6.05 kWh/m²/day. This solar radiation data, sourced from NASA POWER, is useful for solar energy planning, agriculture, and understanding seasonal sunshine availability in Michigan.
Where does this weather data come from?▼
All climate data is sourced from NASA POWER (Prediction Of Worldwide Energy Resources), based on MERRA-2 satellite and model data. It provides monthly averages for temperature, precipitation, humidity, wind speed, and solar radiation.
📚 Data Source
All weather data is sourced from NASA POWER (Prediction of Worldwide Energy Resources), a NASA project providing solar and meteorological data for renewable energy, building efficiency, and agricultural research.