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March Weather in Saint Clair, United States

Last updated: June 24, 2025

In March, the average temperature in Saint Clair, United States hovers around 9°C (48°F). While you might experience a chilly minimum of -16°C (4°F), the mercury can also soar to a maximum of 29°C (84°F). Expect some wet days, as precipitation amounts reach 126 mm (5.0 in) over 11 days, and prepare for a rather humid atmosphere with an average humidity of 80%.

March Temperature in Saint Clair

In March in Saint Clair, the average temperature is 9°C (48°F), with maximums reaching up to 29°C (84°F) and minimums dropping as low as -16°C (4°F). Travelers should be prepared for a wide range of temperatures, from warm days to chilly nights.

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

The chart illustrates March 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, March typically has an average temperature of 9°C (48°F), with highs reaching up to 29°C (84°F) and lows dropping to around -16°C (4°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.

March Precipitation in Saint Clair

In Saint Clair in March, the total precipitation amount is 126 mm (5.0 in) spread over 11 days.

March Precipitation Trends in Saint Clair

The chart displays monthly precipitation patterns in Saint Clair, with values for each month alongside March’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how March’s conditions compare to those of other months. In Saint Clair, March typically receives around 126 mm (5.0 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec76841261301548798131591086958
Data source: Precipitation data for March generated using information from the Copernicus Climate Change Service.
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March Humidity in Saint Clair

In Saint Clair in March humidity is 80%. With an average temperature of 9°C (48°F), this humidity feels like a damp chill that seeps into your bones, making outdoor activities less enjoyable and travel quite uncomfortable.

March Average Humidity in Saint Clair

This chart illustrates the average monthly humidity levels in Saint Clair, with March’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In March, 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 March generated using information from the Copernicus Climate Change Service.

March UV Index in Saint Clair

In Saint Clair in March, 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 Saint Clair, you can refer to this Hourly UV Index in Saint Clair.

Maximum UV Index Levels in Saint Clair for March

The chart shows the monthly maximum UV Index (UVI) for Saint Clair in March, 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 March, the maximum UV index in Saint Clair typically reaches 6, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3569101111109753
Data source: Saint Clair March 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 March 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 March’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 March’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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