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April Weather in Loudon, United States

Last updated: June 24, 2025

In April, the average temperature in Loudon, United States hovers around 15°C (60°F), offering a mild climate for residents and visitors alike. Be prepared for temperature fluctuations, as the minimum can dip to -1°C (31°F) while the maximum can reach a warm 31°C (87°F). Expect 139 mm (5.5 in) of precipitation spread over 11 days, contributing to an average humidity level of 82%. Whether you're enjoying the warmth or staying dry, this month's weather has something for everyone!

April Temperature in Loudon

In April in Loudon, the average temperature is 15°C (60°F). The maximum can reach 31°C (87°F), while the minimum can drop as low as -1°C (31°F). This temperature variability makes it advisable for travelers to pack for both warm and chilly weather, ensuring they are prepared for any conditions during their visit.

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

The chart illustrates April temperature patterns in Loudon, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Loudon, April typically has an average temperature of 15°C (60°F), with highs reaching up to 31°C (87°F) and lows dropping to around -1°C (31°F).
JanFebMarAprMayJunJulAugSepOctNovDec424753606975797773645046
Data source: Temperature data for Loudon 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 Loudon

In Loudon in April, the precipitation amount is 139 mm (5.5 in) occurring over a span of 11 days.

April Precipitation Trends in Loudon

The chart displays monthly precipitation patterns in Loudon, 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 Loudon, April typically receives around 139 mm (5.5 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec1051791661391171111161289712284142
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
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April Humidity in Loudon

In Loudon in April humidity is 82%. With an average temperature of 15°C (60°F), this humidity feels like a heavy blanket wrapping around you, making outdoor activities feel sticky and draining, which can hinder your travel experience.

April Average Humidity in Loudon

This chart illustrates the average monthly humidity levels in Loudon, 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 Loudon is approximately 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%86%86%82%85%85%83%76%76%80%88%88%
Data source: Humidity data for April generated using information from the Copernicus Climate Change Service.

April UV Index in Loudon

In Loudon 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 Loudon.

Maximum UV Index Levels in Loudon for April

The chart shows the monthly maximum UV Index (UVI) for Loudon 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 Loudon typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec36810111111109753
Data source: Loudon 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 Loudon Compares to Other Months

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

This table compares monthly weather conditions in Loudon, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (42°F)105 mm (4.1 inches)86%moderate
February Weather8°C (47°F)179 mm (7.1 inches)86%high
March Weather12°C (53°F)166 mm (6.5 inches)86%very high
April Weather15°C (60°F)139 mm (5.5 inches)82%very high
May Weather21°C (70°F)117 mm (4.6 inches)85%extreme
June Weather24°C (75°F)111 mm (4.4 inches)85%extreme
July Weather26°C (79°F)116 mm (4.6 inches)83%extreme
August Weather25°C (78°F)128 mm (5.0 inches)76%very high
September Weather23°C (74°F)97 mm (3.8 inches)76%very high
October Weather18°C (64°F)122 mm (4.8 inches)80%high
November Weather10°C (50°F)84 mm (3.3 inches)88%moderate
December Weather8°C (46°F)142 mm (5.6 inches)88%moderate

Compare Loudon's Climate with Cities Worldwide