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June Weather in Saint Charles, United States

Last updated: June 24, 2025

In June, the average temperature in Saint Charles, United States reaches a pleasant 24°C (75°F). However, be prepared for temperature fluctuations, with minimums dipping to 9°C (49°F) and maximums soaring up to 39°C (102°F). Expect about 117 mm (4.6 in) of precipitation over 9 days, while the air remains quite humid, with an average humidity level of 81%.

June Temperature in Saint Charles

In June in Saint Charles the average temperature is 24°C (75°F). Maximums can reach 39°C (102°F) and minimums can be as low as 9°C (49°F). This makes Saint Charles a great destination for travelers seeking a warm climate while also being prepared for cooler evenings.

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

The chart illustrates June 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, June typically has an average temperature of 24°C (75°F), with highs reaching up to 39°C (102°F) and lows dropping to around 9°C (49°F).
JanFebMarAprMayJunJulAugSepOctNovDec232540506375787469533932
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.

June Precipitation in Saint Charles

In Saint Charles in June, the total precipitation amount is 117 mm (4.6 in) spread over a period of 9 days.

June Precipitation Trends in Saint Charles

The chart displays monthly precipitation patterns in Saint Charles, with values for each month alongside June’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how June’s conditions compare to those of other months. In Saint Charles, June typically receives around 117 mm (4.6 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec4139856916311769761171344336
Data source: Precipitation data for June generated using information from the Copernicus Climate Change Service.
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June Humidity in Saint Charles

In Saint Charles in June humidity is 81%. With an average temperature of 24°C (75°F), this humidity feels like a warm, thick blanket enveloping you, making traveling a bit sticky and sweaty, yet still inviting for those who enjoy the rich, tropical atmosphere.

June Average Humidity in Saint Charles

This chart illustrates the average monthly humidity levels in Saint Charles, with June’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In June, average humidity in Saint Charles is approximately 81%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec78%80%77%78%77%81%81%77%73%75%85%83%
Data source: Humidity data for June generated using information from the Copernicus Climate Change Service.

June UV Index in Saint Charles

In Saint Charles in June, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in Saint Charles.

Maximum UV Index Levels in Saint Charles for June

The chart shows the monthly maximum UV Index (UVI) for Saint Charles in June, 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 June, the maximum UV index in Saint Charles typically reaches 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec35689111098643
Data source: Saint Charles June 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 June 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 June’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 June’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
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 Weather5°C (41°F)85 mm (3.3 inches)77%high
April Weather10°C (50°F)69 mm (2.7 inches)77%very high
May Weather17°C (63°F)163 mm (6.4 inches)77%very high
June Weather24°C (75°F)117 mm (4.6 inches)81%extreme
July Weather25°C (78°F)69 mm (2.7 inches)81%very high
August Weather24°C (75°F)76 mm (3.0 inches)77%very high
September Weather20°C (69°F)117 mm (4.6 inches)73%very high
October Weather12°C (53°F)134 mm (5.3 inches)75%high
November Weather4°C (39°F)43 mm (1.7 inches)85%moderate
December Weather0°C (32°F)36 mm (1.4 inches)83%moderate

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