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April Weather in Lemont, United States

Last updated: June 24, 2025

In April, the average temperature in Lemont, United States hovers around 10°C (50°F), with a minimum dipping to -4°C (24°F) and a maximum soaring up to 28°C (82°F). Expect 106 mm (4.2 in) of precipitation spread over 14 days, resulting in an average humidity of 88%, making it a notably damp month.

April Temperature in Lemont

In April in Lemont, the average temperature is 10°C (50°F), with maximums reaching up to 28°C (82°F) and minimums dropping to as low as -4°C (24°F). This makes it essential for travelers to pack layers to prepare for both warm days and chilly nights.

April Weather in Lemont: Daily Temperature Highs, Lows, and Averages

The chart illustrates April temperature patterns in Lemont, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Lemont, April typically has an average temperature of 10°C (50°F), with highs reaching up to 28°C (82°F) and lows dropping to around -4°C (24°F).
JanFebMarAprMayJunJulAugSepOctNovDec293239506069757366554034
Data source: Temperature data for Lemont 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.

April Precipitation in Lemont

In Lemont in April, the precipitation amount is 106 mm (4.2 in) over a period of 14 days.

April Precipitation Trends in Lemont

The chart displays monthly precipitation patterns in Lemont, with values for each month alongside April’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how April’s conditions compare to those of other months. In Lemont, April typically receives around 106 mm (4.2 inches) of precipitation spread over approximately 14 days.
JanFebMarAprMayJunJulAugSepOctNovDec671069010612294110871221128391
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
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April Humidity in Lemont

In Lemont in April, humidity is 88%. With an average temperature of 10°C (50°F), this humidity feels like a damp chill that seeps into your bones, making outdoor exploration uncomfortable and encouraging travelers to seek cozy indoor activities instead.

April Average Humidity in Lemont

This chart illustrates the average monthly humidity levels in Lemont, with April’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In April, average humidity in Lemont is approximately 88%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec90%90%89%88%80%79%74%64%67%81%89%88%
Data source: Humidity data for April generated using information from the Copernicus Climate Change Service.

April UV Index in Lemont

In Lemont in April, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Lemont.

Maximum UV Index Levels in Lemont for April

The chart shows the monthly maximum UV Index (UVI) for Lemont in April, 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 April, the maximum UV index in Lemont typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356910101098643
Data source: Lemont April 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 April Weather in Lemont Compares to Other Months

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

This table compares monthly weather conditions in Lemont, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-2°C (29°F)67 mm (2.6 inches)89%moderate
February Weather0°C (33°F)106 mm (4.2 inches)90%moderate
March Weather4°C (39°F)90 mm (3.5 inches)89%high
April Weather10°C (50°F)106 mm (4.2 inches)88%very high
May Weather16°C (61°F)122 mm (4.8 inches)80%very high
June Weather20°C (69°F)94 mm (3.7 inches)79%very high
July Weather24°C (75°F)110 mm (4.3 inches)74%very high
August Weather23°C (73°F)87 mm (3.4 inches)64%very high
September Weather19°C (66°F)122 mm (4.8 inches)67%very high
October Weather13°C (56°F)112 mm (4.4 inches)81%high
November Weather5°C (41°F)83 mm (3.3 inches)89%moderate
December Weather1°C (34°F)91 mm (3.6 inches)88%moderate

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