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April Weather in Frederick, United States

Last updated: June 24, 2025

In April, the average temperature in Frederick, United States is a crisp 9°C (48°F). Expect a wide temperature range, with minimums dipping to -13°C (8°F) and maximums reaching 29°C (85°F). You'll also encounter 56 mm (2.2 in) of precipitation spread over about 10 days, contributing to an average humidity level of 76%. Stay prepared for the diverse weather!

April Temperature in Frederick

In April in Frederick, the average temperature is 9°C (48°F). Maximums can reach 29°C (85°F), while minimums can drop as low as -13°C (8°F). Travelers should be prepared for a wide range of temperatures during this time.

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

The chart illustrates April temperature patterns in Frederick, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Frederick, April typically has an average temperature of 9°C (48°F), with highs reaching up to 29°C (85°F) and lows dropping to around -13°C (8°F).
JanFebMarAprMayJunJulAugSepOctNovDec302940485669747266494033
Data source: Temperature data for Frederick 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 Frederick

In Frederick in April, the precipitation amount is 56 mm (2.2 in) over the course of 10 days.

April Precipitation Trends in Frederick

The chart displays monthly precipitation patterns in Frederick, 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 Frederick, April typically receives around 56 mm (2.2 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec2127555610946354128372414
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
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April Humidity in Frederick

In Frederick in April humidity is 76%. With an average temperature of 9°C (48°F), this humidity feels like a chilly embrace, making outdoor activities feel damp and brisk, potentially leaving you feeling colder than the temperature suggests.

April Average Humidity in Frederick

This chart illustrates the average monthly humidity levels in Frederick, 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 Frederick is approximately 76%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%87%81%76%67%58%52%56%65%76%82%89%
Data source: Humidity data for April generated using information from the Copernicus Climate Change Service.

April UV Index in Frederick

In Frederick 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 Frederick.

Maximum UV Index Levels in Frederick for April

The chart shows the monthly maximum UV Index (UVI) for Frederick 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 Frederick typically reaches 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec469111112121110754
Data source: Frederick 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 Frederick Compares to Other Months

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

This table compares monthly weather conditions in Frederick, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-1°C (30°F)21 mm (0.8 inches)88%moderate
February Weather-2°C (30°F)27 mm (1.1 inches)87%high
March Weather4°C (40°F)55 mm (2.2 inches)81%very high
April Weather9°C (48°F)56 mm (2.2 inches)76%extreme
May Weather13°C (56°F)109 mm (4.3 inches)66%extreme
June Weather20°C (69°F)46 mm (1.8 inches)58%extreme
July Weather23°C (74°F)35 mm (1.4 inches)52%extreme
August Weather22°C (73°F)41 mm (1.6 inches)56%extreme
September Weather19°C (66°F)28 mm (1.1 inches)65%very high
October Weather9°C (49°F)37 mm (1.5 inches)76%high
November Weather5°C (40°F)24 mm (0.9 inches)82%moderate
December Weather0°C (33°F)14 mm (0.6 inches)89%moderate

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