February Weather in Alton, United States

Last updated: June 24, 2025

In February, the average temperature in Alton, United States hovers around -3°C (27°F). Expect chilly extremes, with minimums plunging to -23°C (-9°F) and occasional highs reaching 19°C (67°F). You'll likely experience 84 mm (3.3 in) of precipitation spread over 11 days, contributing to a notably high average humidity of 84%. Dress warmly and prepare for some wet weather!

February Temperature in Alton

In February in Alton, the average temperature is -3°C (27°F), with maximums reaching 19°C (67°F) and minimums dropping as low as -23°C (-9°F). Be prepared for a wide range of temperatures when traveling to Alton during this time.

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 -3°C (27°F), with highs reaching up to 19°C (67°F) and lows dropping to around -23°C (-9°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 84 mm (3.3 in) during a period of 11 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 84 mm (3.3 inches) of precipitation spread over approximately 11 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

February Humidity in Alton

In Alton in February humidity is 84%. With an average temperature of -3°C (27°F), this humidity feels like a heavy blanket that wraps around you, making travel uncomfortable and your breath visible in the cold air.

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 84%, 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 reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in Alton for better planning.

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 4, which falls under the moderate 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	-5°C (24°F)	75 mm (2.9 inches)	86%	moderate
February Weather	-3°C (27°F)	84 mm (3.3 inches)	84%	moderate
March Weather	0°C (33°F)	77 mm (3.0 inches)	82%	moderate
April Weather	7°C (44°F)	128 mm (5.0 inches)	80%	very high
May Weather	13°C (56°F)	74 mm (2.9 inches)	72%	very high
June Weather	19°C (66°F)	87 mm (3.4 inches)	72%	very high
July Weather	22°C (72°F)	134 mm (5.3 inches)	67%	very high
August Weather	21°C (71°F)	74 mm (2.9 inches)	66%	very high
September Weather	18°C (64°F)	66 mm (2.6 inches)	71%	high
October Weather	11°C (52°F)	119 mm (4.7 inches)	78%	moderate
November Weather	3°C (39°F)	110 mm (4.3 inches)	84%	moderate
December Weather	-2°C (29°F)	119 mm (4.7 inches)	81%	low