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February Weather in Saint Charles, United States

Last updated: June 24, 2025

In Saint Charles, United States, the weather in February brings an average temperature of -3°C (26°F). Be prepared for extremes, as temperatures can plummet to a chilly -25°C (-14°F) or rise to a warm 19°C (67°F). This month also sees 63 mm (2.5 in) of precipitation over 9 days, contributing to an average humidity of a high 87%.

February Temperature in Saint Charles

In February in Saint Charles, the average temperature is -3°C (26°F), with maximums reaching 19°C (67°F) and minimums dropping as low as -25°C (-14°F). It's essential to pack appropriately for a wide range of temperatures if you plan to travel during this time.

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 -3°C (26°F), with highs reaching up to 19°C (67°F) and lows dropping to around -25°C (-14°F).
JanFebMarAprMayJunJulAugSepOctNovDec252636465969747264533831
Data source: Temperature data for Saint Charles generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

February Precipitation in Saint Charles

In Saint Charles in February, the total precipitation amount is 63 mm (2.5 in) spread over a duration of 9 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 63 mm (2.5 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec5963618811512166761011126060
Data source: Precipitation data for February generated using information from the Copernicus Climate Change Service.
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February Humidity in Saint Charles

In Saint Charles in February, humidity is 87%. With an average temperature of -3°C (26°F), this humidity feels like walking through a thick fog, making travels uncomfortable and adding a chill that seeps into your bones.

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 87%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%87%85%86%80%80%80%81%80%84%90%86%
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 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 Saint Charles for better planning.

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 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec24589101097532
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.
 TemperaturePrecipitationHumidityUV
January Weather-4°C (25°F)59 mm (2.3 inches)88%low
February Weather-3°C (26°F)63 mm (2.5 inches)87%moderate
March Weather2°C (36°F)61 mm (2.4 inches)85%moderate
April Weather8°C (46°F)88 mm (3.4 inches)86%very high
May Weather15°C (59°F)115 mm (4.5 inches)80%very high
June Weather21°C (70°F)121 mm (4.8 inches)80%very high
July Weather23°C (75°F)66 mm (2.6 inches)80%very high
August Weather22°C (72°F)76 mm (3.0 inches)80%very high
September Weather18°C (65°F)101 mm (4.0 inches)80%high
October Weather11°C (53°F)112 mm (4.4 inches)84%moderate
November Weather3°C (38°F)60 mm (2.4 inches)89%moderate
December Weather0°C (32°F)60 mm (2.4 inches)86%low

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