February Weather in Alton, United States

Last updated: June 24, 2025

In February, the average temperature in Alton, United States hovers around 4°C (40°F). Expect a wide temperature range, with a minimum of -22°C (-7°F) and a maximum reaching 26°C (78°F). Rainfall is common, with an average precipitation of 111 mm (4.4 in) over about 10 days. The air is quite humid, with an average humidity of 81%, making for a chilly yet captivating atmosphere.

February Temperature in Alton

In February in Alton, the average temperature is 4°C (40°F), with maximums reaching 26°C (78°F) and minimums dropping as low as -22°C (-7°F). Travelers should be prepared for a wide range of temperatures, from chilly to warm, making it essential to pack layers for their trip.

February Weather in Alton: Daily Temperature Highs, Lows, and Averages

The chart illustrates February temperature patterns in Alton, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Alton, February typically has an average temperature of 4°C (40°F), with highs reaching up to 26°C (78°F) and lows dropping to around -22°C (-7°F).

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

February Precipitation in Alton

In Alton in February, the precipitation amount is 111 mm (4.4 in) over a span of 10 days.

February Precipitation Trends in Alton

The chart displays monthly precipitation patterns in Alton, with values for each month alongside February’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how February’s conditions compare to those of other months. In Alton, February typically receives around 111 mm (4.4 inches) of precipitation spread over approximately 10 days.

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

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Millimeters (mm) Inches (in)

February Humidity in Alton

In Alton in February humidity is 81%. With an average temperature of 4°C (40°F), this humidity feels like a damp chill that can make traveling quite uncomfortable, as the cold air clings uncomfortably to your skin and the moisture can quickly sap your body heat.

February Average Humidity in Alton

This chart illustrates the average monthly humidity levels in Alton, with February’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In February, average humidity in Alton is approximately 81%, offering insight into how humid the weather typically is during this month.

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

February UV Index in Alton

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

Maximum UV Index Levels in Alton for February

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

Data source: Alton February 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 February Weather in Alton Compares to Other Months

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

This table compares monthly weather conditions in Alton, showing how February’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	2°C (36°F)	85 mm (3.3 inches)	83%	moderate
February Weather	4°C (40°F)	111 mm (4.4 inches)	81%	high
March Weather	10°C (50°F)	148 mm (5.8 inches)	80%	high
April Weather	13°C (56°F)	164 mm (6.5 inches)	80%	very high
May Weather	19°C (67°F)	181 mm (7.1 inches)	83%	extreme
June Weather	24°C (76°F)	85 mm (3.3 inches)	83%	extreme
July Weather	26°C (80°F)	80 mm (3.2 inches)	76%	extreme
August Weather	25°C (77°F)	106 mm (4.2 inches)	69%	very high
September Weather	23°C (73°F)	62 mm (2.4 inches)	68%	very high
October Weather	16°C (60°F)	121 mm (4.8 inches)	72%	high
November Weather	8°C (47°F)	77 mm (3.0 inches)	83%	moderate
December Weather	6°C (42°F)	81 mm (3.2 inches)	86%	moderate