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April Weather in Naperville, United States

Last updated: June 24, 2025

In Naperville, United States, the average temperature for April hovers around 9°C (49°F). Expect a range where the minimum can plummet to -8°C (18°F), while the maximum might soar to 29°C (84°F). During this month, anticipate an average precipitation of 117 mm (4.6 in) spread over 11 days, with a high average humidity level at 85%.

April Temperature in Naperville

In April in Naperville, the average temperature is 9°C (49°F). Maximums can reach 29°C (84°F), while minimums can drop as low as -8°C (18°F). Travelers should be prepared for a wide range of temperatures and pack accordingly.

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

The chart illustrates April temperature patterns in Naperville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Naperville, April typically has an average temperature of 9°C (49°F), with highs reaching up to 29°C (84°F) and lows dropping to around -8°C (18°F).
JanFebMarAprMayJunJulAugSepOctNovDec252739486172757367543933
Data source: Temperature data for Naperville 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 Naperville

In Naperville in April, the total precipitation amount reaches 117 mm (4.6 in) over the course of 11 days.

April Precipitation Trends in Naperville

The chart displays monthly precipitation patterns in Naperville, 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 Naperville, April typically receives around 117 mm (4.6 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec63638711715715211991951295753
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
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April Humidity in Naperville

In Naperville in April humidity is 85%. With an average temperature of 9°C (49°F), this humidity feels like a damp chill that seeps into your bones, making every step outside a challenge as the moisture in the air weighs heavily and lingers, transforming even simple outings into a quest for comfort.

April Average Humidity in Naperville

This chart illustrates the average monthly humidity levels in Naperville, 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 Naperville is approximately 85%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%83%84%85%79%82%80%81%80%82%88%84%
Data source: Humidity data for April generated using information from the Copernicus Climate Change Service.

April UV Index in Naperville

In Naperville in April, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Naperville.

Maximum UV Index Levels in Naperville for April

The chart shows the monthly maximum UV Index (UVI) for Naperville 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 Naperville typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec34689101098642
Data source: Naperville 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 Naperville Compares to Other Months

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

This table compares monthly weather conditions in Naperville, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-4°C (26°F)62 mm (2.5 inches)82%moderate
February Weather-3°C (28°F)63 mm (2.5 inches)83%moderate
March Weather4°C (40°F)87 mm (3.4 inches)84%high
April Weather9°C (49°F)117 mm (4.6 inches)85%very high
May Weather16°C (61°F)157 mm (6.2 inches)79%very high
June Weather22°C (72°F)152 mm (6.0 inches)82%very high
July Weather24°C (76°F)119 mm (4.7 inches)80%very high
August Weather23°C (73°F)91 mm (3.6 inches)81%very high
September Weather20°C (68°F)95 mm (3.8 inches)80%very high
October Weather12°C (54°F)129 mm (5.1 inches)82%high
November Weather4°C (39°F)57 mm (2.3 inches)88%moderate
December Weather0°C (33°F)53 mm (2.1 inches)84%low

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