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April Weather in Frederick, United States

Last updated: June 24, 2025

In April, the average temperature in Frederick, United States hovers around 13°C (55°F). Expect a range where the minimum can dip to -2°C (28°F) and the maximum can soar to 30°C (86°F). With 100 mm (3.9 in) of precipitation spread over 12 days, you might want to keep an umbrella handy. The air will be quite humid, with an average humidity level of 84%, adding to the character of this month.

April Temperature in Frederick

In April in Frederick, the average temperature is 13°C (55°F). Maximums can reach 30°C (86°F) and minimums can be as low as -2°C (28°F). Travelers should be prepared for a wide range of temperatures during this time, so packing layers is essential.

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 13°C (55°F), with highs reaching up to 30°C (86°F) and lows dropping to around -2°C (28°F).
JanFebMarAprMayJunJulAugSepOctNovDec353944556473797670604538
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 100 mm (3.9 in) over the course of 12 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 100 mm (3.9 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec619590100134111138114107998894
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 84%. With average temperature 13°C (55°F), this humidity feels like a heavy blanket wrapping around you, making every step feel sluggish and draining for traveling.

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 84%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%86%86%84%78%79%70%59%68%80%87%85%
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 is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, 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 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec357910101098743
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 Weather2°C (35°F)61 mm (2.4 inches)86%moderate
February Weather4°C (39°F)95 mm (3.7 inches)86%moderate
March Weather7°C (44°F)90 mm (3.6 inches)86%high
April Weather13°C (55°F)100 mm (3.9 inches)84%very high
May Weather18°C (65°F)134 mm (5.3 inches)78%very high
June Weather23°C (73°F)111 mm (4.4 inches)79%very high
July Weather26°C (79°F)138 mm (5.4 inches)70%very high
August Weather24°C (76°F)114 mm (4.5 inches)59%very high
September Weather21°C (70°F)107 mm (4.2 inches)68%very high
October Weather16°C (60°F)99 mm (3.9 inches)80%high
November Weather7°C (45°F)88 mm (3.5 inches)86%moderate
December Weather4°C (39°F)94 mm (3.7 inches)85%moderate

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