March Weather in Bethalto, United States

Last updated: June 24, 2025

In March, the average temperature in Bethalto, United States hovers around 8°C (46°F). However, be prepared for the extremes, as temperatures can dip to a chilling -17°C (1°F) or rise to a warm 26°C (78°F). With an average precipitation of 133 mm (5.2 in) over 12 days and a humidity level of 80%, you'll want to pack accordingly for this diverse climate.

March Temperature in Bethalto

In March in Bethalto, the average temperature is 8°C (46°F), with maximums reaching 26°C (78°F) and minimums dropping as low as -17°C (1°F). It's essential to pack accordingly, as the temperatures can vary significantly throughout the day.

March Weather in Bethalto: Daily Temperature Highs, Lows, and Averages

The chart illustrates March temperature patterns in Bethalto, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Bethalto, March typically has an average temperature of 8°C (46°F), with highs reaching up to 26°C (78°F) and lows dropping to around -17°C (1°F).

Data source: Temperature data for Bethalto generated using information from the Copernicus Climate Change Service.

March Precipitation in Bethalto

In Bethalto in March, the precipitation amount is 133 mm (5.2 in) spread over 12 days.

March Precipitation Trends in Bethalto

The chart displays monthly precipitation patterns in Bethalto, 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 Bethalto, March typically receives around 133 mm (5.2 inches) of precipitation spread over approximately 12 days.

Data source: Precipitation data for March generated using information from the Copernicus Climate Change Service.

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

March Humidity in Bethalto

In Bethalto in March, humidity is 80%. With an average temperature of 8°C (46°F), this humidity feels like traveling through a damp and chilly mist, making even a short walk feel heavy and uncomfortable.

March Average Humidity in Bethalto

This chart illustrates the average monthly humidity levels in Bethalto, 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 Bethalto is approximately 80%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for March generated using information from the Copernicus Climate Change Service.

March UV Index in Bethalto

In Bethalto 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 Bethalto, you can refer to this Hourly UV Index in Bethalto.

Maximum UV Index Levels in Bethalto for March

The chart shows the monthly maximum UV Index (UVI) for Bethalto 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 Bethalto typically reaches 6, which falls under the high exposure category.

Data source: Bethalto 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 Bethalto Compares to Other Months

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

This table compares monthly weather conditions in Bethalto, showing how March’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	0°C (32°F)	75 mm (3.0 inches)	82%	moderate
February Weather	1°C (35°F)	80 mm (3.1 inches)	80%	moderate
March Weather	8°C (46°F)	133 mm (5.2 inches)	80%	high
April Weather	12°C (55°F)	132 mm (5.2 inches)	80%	very high
May Weather	19°C (67°F)	156 mm (6.1 inches)	82%	very high
June Weather	25°C (77°F)	111 mm (4.4 inches)	83%	extreme
July Weather	26°C (79°F)	100 mm (3.9 inches)	81%	extreme
August Weather	24°C (76°F)	120 mm (4.7 inches)	80%	very high
September Weather	22°C (72°F)	64 mm (2.5 inches)	76%	very high
October Weather	15°C (59°F)	102 mm (4.0 inches)	76%	high
November Weather	6°C (44°F)	75 mm (2.9 inches)	85%	moderate
December Weather	3°C (38°F)	57 mm (2.2 inches)	86%	moderate