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April Weather in Saint Clair, United States

Last updated: June 24, 2025

In Saint Clair, United States, the average temperature in April hovers around 7°C (45°F), offering a cool yet varied climate. Expect minimum temperatures to dip as low as -15°C (5°F), while highs can reach 29°C (84°F). Throughout the month, there is an average precipitation of 91 mm (3.6 in) over approximately 10 days, resulting in a relatively high average humidity of 81%. Prepare for a blend of chilly and warm days, along with some rainy spells!

April Temperature in Saint Clair

In April in Saint Clair, the average temperature is 7°C (45°F), with maximums reaching up to 29°C (84°F) and minimums dropping as low as -15°C (5°F). Travelers should be prepared for a wide range of temperatures and dress accordingly.

April Weather in Saint Clair: Daily Temperature Highs, Lows, and Averages

The chart illustrates April temperature patterns in Saint Clair, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Saint Clair, April typically has an average temperature of 7°C (45°F), with highs reaching up to 29°C (84°F) and lows dropping to around -15°C (5°F).
JanFebMarAprMayJunJulAugSepOctNovDec171634446072747165493425
Data source: Temperature data for Saint Clair 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 Saint Clair

In Saint Clair in April, the precipitation amount totals 91 mm (3.6 in) over a span of 10 days.

April Precipitation Trends in Saint Clair

The chart displays monthly precipitation patterns in Saint Clair, 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 Saint Clair, April typically receives around 91 mm (3.6 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec34416891140118103119137933644
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
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April Humidity in Saint Clair

In Saint Clair in April, humidity is 81%. With an average temperature of 7°C (45°F), this humidity feels like a damp chill wrapping around you, making outdoor adventures slightly uncomfortable and requiring extra layers to stay warm while exploring.

April Average Humidity in Saint Clair

This chart illustrates the average monthly humidity levels in Saint Clair, 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 Saint Clair is approximately 81%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%84%80%81%74%81%80%77%75%80%87%83%
Data source: Humidity data for April generated using information from the Copernicus Climate Change Service.

April UV Index in Saint Clair

In Saint Clair in April, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Saint Clair.

Maximum UV Index Levels in Saint Clair for April

The chart shows the monthly maximum UV Index (UVI) for Saint Clair 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 Saint Clair typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec35589101098533
Data source: Saint Clair 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 Saint Clair Compares to Other Months

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

This table compares monthly weather conditions in Saint Clair, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-8°C (17°F)34 mm (1.3 inches)82%moderate
February Weather-9°C (17°F)41 mm (1.6 inches)84%moderate
March Weather1°C (34°F)68 mm (2.7 inches)80%moderate
April Weather7°C (45°F)91 mm (3.6 inches)81%very high
May Weather15°C (60°F)140 mm (5.5 inches)74%very high
June Weather22°C (72°F)118 mm (4.7 inches)80%very high
July Weather23°C (74°F)103 mm (4.1 inches)80%very high
August Weather21°C (71°F)119 mm (4.7 inches)77%very high
September Weather18°C (65°F)137 mm (5.4 inches)75%very high
October Weather9°C (49°F)93 mm (3.7 inches)80%moderate
November Weather1°C (35°F)36 mm (1.4 inches)87%moderate
December Weather-4°C (25°F)44 mm (1.7 inches)83%moderate

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