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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 13°C (55°F). Expect a minimum chill of -4°C (25°F) and the occasional warm day peaking at a toasty 31°C (89°F). During this month, precipitation totals about 130 mm (5.1 in), typically falling over 12 days. Don't forget your umbrella, as the average humidity sits at a high 80%.

April Temperature in Saint Clair

In April in Saint Clair, the average temperature is 13°C (55°F). Maximums can reach 31°C (89°F) and minimums can be as low as -4°C (25°F). Be prepared for a wide range of temperatures, making it advisable to pack both warm and light clothing for your travels.

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 13°C (55°F), with highs reaching up to 31°C (89°F) and lows dropping to around -4°C (25°F).
JanFebMarAprMayJunJulAugSepOctNovDec333647556675797672594540
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 is 130 mm (5.1 in) over a span of 12 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 130 mm (5.1 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec76841261301548798131591086958
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 80%. With an average temperature of 13°C (55°F), this humidity feels like a damp blanket wrapping around you, making any outdoor activity feel stifling and heavy, which can lead to fatigue for travelers unaccustomed to such moist conditions.

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 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%80%80%80%82%83%81%80%76%76%85%86%
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 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check 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 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3569101111109753
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 Weather1°C (34°F)76 mm (3.0 inches)82%moderate
February Weather2°C (37°F)84 mm (3.3 inches)80%moderate
March Weather9°C (48°F)126 mm (5.0 inches)80%high
April Weather13°C (55°F)130 mm (5.1 inches)80%very high
May Weather19°C (66°F)154 mm (6.1 inches)82%very high
June Weather24°C (76°F)87 mm (3.4 inches)83%extreme
July Weather26°C (79°F)98 mm (3.8 inches)81%extreme
August Weather24°C (76°F)131 mm (5.1 inches)80%very high
September Weather22°C (72°F)59 mm (2.3 inches)76%very high
October Weather15°C (59°F)108 mm (4.3 inches)76%high
November Weather7°C (45°F)69 mm (2.7 inches)85%moderate
December Weather4°C (40°F)58 mm (2.3 inches)86%moderate

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