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April Weather in Bay City, United States

Last updated: June 24, 2025

In Bay City, United States, the average temperature in April hovers around 9°C (49°F), with daily variations seeing a minimum of 2°C (36°F) and peaks at 20°C (69°F). Expect a rainy season, as 157 mm (6.2 in) of precipitation falls over approximately 16 days. With an average humidity level of 83%, the atmosphere can feel quite moist, adding to the region's unique charm.

April Temperature in Bay City

In April in Bay City, the average temperature is 9°C (49°F). Maximum temperatures can reach 20°C (69°F), while minimums can drop as low as 2°C (36°F). This makes Bay City a great destination for travelers looking for cool but mild weather during this time.

April Weather in Bay City: Daily Temperature Highs, Lows, and Averages

The chart illustrates April temperature patterns in Bay City, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Bay City, April typically has an average temperature of 9°C (49°F), with highs reaching up to 20°C (69°F) and lows dropping to around 2°C (36°F).
JanFebMarAprMayJunJulAugSepOctNovDec464446485256596059545046
Data source: Temperature data for Bay City generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

April Precipitation in Bay City

In Bay City in April, the total precipitation amount is 157 mm (6.2 in) spread over 16 days.

April Precipitation Trends in Bay City

The chart displays monthly precipitation patterns in Bay City, with values for each month alongside April’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how April’s conditions compare to those of other months. In Bay City, April typically receives around 157 mm (6.2 inches) of precipitation spread over approximately 16 days.
JanFebMarAprMayJunJulAugSepOctNovDec2702441921577767161896176274301
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
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April Humidity in Bay City

In Bay City in April, humidity is 83%. With an average temperature of 9°C (49°F), this humidity feels like a damp blanket wrapping around you, making outdoor activities uncomfortable for traveling and requiring extra layers to stay warm and dry.

April Average Humidity in Bay City

This chart illustrates the average monthly humidity levels in Bay City, with April’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In April, average humidity in Bay City is approximately 83%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%84%85%83%83%84%82%74%71%81%87%87%
Data source: Humidity data for April generated using information from the Copernicus Climate Change Service.

April UV Index in Bay City

In Bay City in April, the maximum UV index is 6, which corresponds to a high Exposure Category. The time to burn is approximately 25 minutes. To find the hourly UV index in Bay City, you can refer to this Hourly UV Index in Bay City.

Maximum UV Index Levels in Bay City for April

The chart shows the monthly maximum UV Index (UVI) for Bay City in April, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In April, the maximum UV index in Bay City typically reaches 6, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec23569101087532
Data source: Bay City April UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How April Weather in Bay City Compares to Other Months

Weather in Bay City varies notably across the year, with each month offering distinct climate conditions. This page compares April’s weather to other months in Bay City, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Bay City, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather8°C (46°F)270 mm (10.6 inches)85%low
February Weather7°C (44°F)244 mm (9.6 inches)84%moderate
March Weather8°C (46°F)192 mm (7.6 inches)85%moderate
April Weather9°C (49°F)157 mm (6.2 inches)83%high
May Weather11°C (53°F)77 mm (3.0 inches)83%very high
June Weather14°C (57°F)67 mm (2.6 inches)83%very high
July Weather15°C (59°F)16 mm (0.6 inches)82%very high
August Weather15°C (60°F)17 mm (0.7 inches)74%very high
September Weather15°C (59°F)96 mm (3.8 inches)71%high
October Weather12°C (54°F)176 mm (6.9 inches)81%moderate
November Weather10°C (50°F)274 mm (10.8 inches)87%moderate
December Weather8°C (46°F)301 mm (11.8 inches)87%low

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