February Weather in Saint Charles, United States

Last updated: June 24, 2025

In February, the average temperature in Saint Charles, United States hovers around -4°C (25°F), with extremes ranging from a chilly -28°C (-17°F) to a surprisingly warm 22°C (72°F). During this month, expect 39 mm (1.6 in) of precipitation spread over approximately 7 days. The air tends to be quite humid, with an average humidity of 80%, adding to the overall experience of the season.

February Temperature in Saint Charles

In February in Saint Charles, the average temperature is -4°C (25°F), with a maximum that can reach 22°C (72°F) and a minimum that can drop as low as -28°C (-17°F). Travelers should be prepared for a wide range of temperatures during this time, ensuring they pack both warm and more moderate clothing options.

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

The chart illustrates February temperature patterns in Saint Charles, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Saint Charles, February typically has an average temperature of -4°C (25°F), with highs reaching up to 22°C (72°F) and lows dropping to around -28°C (-17°F).

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

February Precipitation in Saint Charles

In Saint Charles in February, the precipitation amount is 39 mm (1.6 in) over the course of 7 days.

February Precipitation Trends in Saint Charles

The chart displays monthly precipitation patterns in Saint 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 Saint Charles, February typically receives around 39 mm (1.6 inches) of precipitation spread over approximately 7 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 Saint Charles

In Saint Charles in February humidity is 80%. With an average temperature of -4°C (25°F), this humidity feels like a biting chill, making traveling outdoors quite uncomfortable as the damp air clings to your skin, intensifying the cold and sapping your warmth with every gust of wind.

February Average Humidity in Saint Charles

This chart illustrates the average monthly humidity levels in Saint 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 Saint Charles is approximately 80%, 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 Saint Charles

In Saint 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 Saint Charles.

Maximum UV Index Levels in Saint Charles for February

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

Data source: Saint 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 Saint Charles Compares to Other Months

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

This table compares monthly weather conditions in Saint Charles, 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 (23°F)	41 mm (1.6 inches)	78%	moderate
February Weather	-4°C (25°F)	39 mm (1.6 inches)	80%	moderate
March Weather	5°C (41°F)	85 mm (3.3 inches)	77%	high
April Weather	10°C (50°F)	69 mm (2.7 inches)	77%	very high
May Weather	17°C (63°F)	163 mm (6.4 inches)	77%	very high
June Weather	24°C (75°F)	117 mm (4.6 inches)	81%	extreme
July Weather	25°C (78°F)	69 mm (2.7 inches)	81%	very high
August Weather	24°C (75°F)	76 mm (3.0 inches)	77%	very high
September Weather	20°C (69°F)	117 mm (4.6 inches)	73%	very high
October Weather	12°C (53°F)	134 mm (5.3 inches)	75%	high
November Weather	4°C (39°F)	43 mm (1.7 inches)	85%	moderate
December Weather	0°C (32°F)	36 mm (1.4 inches)	83%	moderate