February Weather in St. Charles, United States

Last updated: June 24, 2025

In February, the average temperature in St. Charles, United States hovers around 6°C (42°F), with a notable minimum of -12°C (10°F) and a maximum reaching up to 25°C (78°F). This month sees precipitation totaling 93 mm (3.7 in) over approximately 12 days, while the average humidity remains high at 83%.

February Temperature in St. Charles

In February in St. Charles, the average temperature is 6°C (42°F). Maximum temperatures can reach 25°C (78°F), while minimums can drop as low as -12°C (10°F). Be prepared for a wide range of temperatures when traveling during this month.

February Weather in St. Charles: Daily Temperature Highs, Lows, and Averages

The chart illustrates February temperature patterns in St. Charles, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In St. Charles, February typically has an average temperature of 6°C (42°F), with highs reaching up to 25°C (78°F) and lows dropping to around -12°C (10°F).

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

February Precipitation in St. Charles

In St. Charles in February, the precipitation amount is 93 mm (3.7 in) over the course of 12 days.

February Precipitation Trends in St. Charles

The chart displays monthly precipitation patterns in St. Charles, 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 St. Charles, February typically receives around 93 mm (3.7 inches) of precipitation spread over approximately 12 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 St. Charles

In St. Charles in February, humidity is 83%. With an average temperature of 6°C (42°F), this humidity feels like a damp chill that seeps into your bones, making it essential to bundle up while exploring the area.

February Average Humidity in St. Charles

This chart illustrates the average monthly humidity levels in St. Charles, 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 St. Charles is approximately 83%, 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 St. Charles

In St. Charles in February, the maximum UV index reaches 5, which corresponds to a moderate Exposure Category. Under these conditions, the estimated time to burn is approximately 30 minutes. For more details, you can check the Hourly UV Index in St. Charles.

Maximum UV Index Levels in St. Charles for February

The chart shows the monthly maximum UV Index (UVI) for St. Charles 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 St. Charles typically reaches 5, which falls under the moderate exposure category.

Data source: St. Charles 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 St. Charles Compares to Other Months

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

This table compares monthly weather conditions in St. Charles, showing how February’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	4°C (39°F)	62 mm (2.4 inches)	84%	moderate
February Weather	6°C (42°F)	93 mm (3.7 inches)	83%	moderate
March Weather	9°C (48°F)	77 mm (3.0 inches)	83%	high
April Weather	14°C (58°F)	99 mm (3.9 inches)	81%	very high
May Weather	19°C (67°F)	118 mm (4.6 inches)	78%	very high
June Weather	24°C (76°F)	106 mm (4.2 inches)	79%	very high
July Weather	27°C (81°F)	122 mm (4.8 inches)	74%	very high
August Weather	26°C (79°F)	151 mm (5.9 inches)	72%	very high
September Weather	23°C (73°F)	91 mm (3.6 inches)	75%	very high
October Weather	17°C (64°F)	108 mm (4.2 inches)	81%	high
November Weather	9°C (49°F)	78 mm (3.1 inches)	85%	moderate
December Weather	6°C (43°F)	86 mm (3.4 inches)	84%	moderate