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April Weather in Decatur, United States

Last updated: June 24, 2025

In Decatur, United States, the average temperature in April hovers around 18°C (65°F). Expect a minimum dip to 1°C (35°F) and a pleasant maximum of 31°C (89°F). With 136 mm (5.4 in) of precipitation spread over 9 days, it's wise to be prepared for some rain. The air is typically quite humid, with an average humidity level of 82%, making it feel warmer than it is.

April Temperature in Decatur

In April in Decatur, the average temperature is 18°C (65°F). Maximums can reach 31°C (89°F), and minimums can be as low as 1°C (35°F). This varied climate makes Decatur an interesting destination for travelers, offering the chance to enjoy both warm days and cool evenings.

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 (65°F), with highs reaching up to 31°C (89°F) and lows dropping to around 1°C (35°F).
JanFebMarAprMayJunJulAugSepOctNovDec485460647379818178695551
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 precipitation amount is 136 mm (5.4 in) over a span of 9 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 136 mm (5.4 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec1051561161361221631211279610070121
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 82%. With an average temperature of 18°C (65°F), this humidity feels like a warm, sticky embrace that can quickly leave travelers feeling fatigued and in need of frequent breaks to stay refreshed and hydrated.

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 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%84%82%82%82%79%82%77%74%73%85%88%
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 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 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 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec478111111111110864
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 Weather9°C (48°F)105 mm (4.1 inches)85%moderate
February Weather12°C (54°F)156 mm (6.1 inches)84%high
March Weather16°C (60°F)116 mm (4.6 inches)82%very high
April Weather18°C (65°F)136 mm (5.4 inches)82%extreme
May Weather23°C (74°F)122 mm (4.8 inches)82%extreme
June Weather26°C (79°F)163 mm (6.4 inches)79%extreme
July Weather27°C (81°F)121 mm (4.8 inches)82%extreme
August Weather27°C (81°F)127 mm (5.0 inches)77%extreme
September Weather25°C (78°F)95 mm (3.8 inches)74%very high
October Weather20°C (69°F)100 mm (3.9 inches)73%very high
November Weather13°C (55°F)70 mm (2.7 inches)85%high
December Weather11°C (52°F)121 mm (4.8 inches)88%moderate

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