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April Weather in Decatur, United States

Last updated: June 24, 2025

In April, the average temperature in Decatur, United States hovers around 18°C (64°F). Expect a minimum chill of 0°C (33°F) and soaring highs reaching up to 35°C (94°F). With an average humidity of 75%, you can also anticipate around 91 mm (3.6 in) of precipitation spread across 8 days.

April Temperature in Decatur

In April in Decatur, the average temperature is 18°C (64°F). Maximum temperatures can reach 35°C (94°F), while minimums can drop as low as 0°C (33°F). Be prepared for a wide range of weather conditions when traveling during this time.

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

The chart illustrates April temperature patterns in Decatur, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Decatur, April typically has an average temperature of 18°C (64°F), with highs reaching up to 35°C (94°F) and lows dropping to around 0°C (33°F).
JanFebMarAprMayJunJulAugSepOctNovDec454859647481858478665550
Data source: Temperature data for Decatur 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 Decatur

In Decatur in April, the total precipitation amount is 91 mm (3.6 in) over the course of 8 days.

April Precipitation Trends in Decatur

The chart displays monthly precipitation patterns in Decatur, 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 Decatur, April typically receives around 91 mm (3.6 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec51788591135864482811215049
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
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April Humidity in Decatur

In Decatur in April, humidity is 75%. With an average temperature of 18°C (64°F), this humidity feels like a warm blanket enveloping you, making your travels a bit sticky and requiring frequent breaks in the shade to stay comfortable.

April Average Humidity in Decatur

This chart illustrates the average monthly humidity levels in Decatur, 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 Decatur is approximately 75%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec77%76%74%75%80%80%75%67%64%70%82%85%
Data source: Humidity data for April generated using information from the Copernicus Climate Change Service.

April UV Index in Decatur

In Decatur in April, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Decatur.

Maximum UV Index Levels in Decatur for April

The chart shows the monthly maximum UV Index (UVI) for Decatur 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 Decatur typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec468101111111110864
Data source: Decatur 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 Decatur Compares to Other Months

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

This table compares monthly weather conditions in Decatur, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather7°C (45°F)51 mm (2.0 inches)77%moderate
February Weather9°C (48°F)78 mm (3.1 inches)76%high
March Weather15°C (59°F)85 mm (3.3 inches)74%very high
April Weather18°C (64°F)91 mm (3.6 inches)75%very high
May Weather23°C (74°F)135 mm (5.3 inches)80%extreme
June Weather27°C (81°F)86 mm (3.4 inches)80%extreme
July Weather29°C (85°F)44 mm (1.7 inches)75%extreme
August Weather29°C (84°F)82 mm (3.2 inches)67%extreme
September Weather26°C (78°F)81 mm (3.2 inches)64%very high
October Weather19°C (67°F)121 mm (4.8 inches)70%very high
November Weather13°C (55°F)50 mm (2.0 inches)82%high
December Weather10°C (50°F)49 mm (1.9 inches)85%moderate

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