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April Weather in Lancaster, United States

Last updated: June 24, 2025

In April, the average temperature in Lancaster, United States hovers around 10°C (51°F). However, be prepared for a range of temperatures, with a minimum that can drop to -9°C (16°F) and a maximum reaching up to 29°C (85°F). With 84 mm (3.3 in) of precipitation over approximately 10 days, it's advisable to carry an umbrella. The air tends to be fairly humid, with an average humidity level of 77%, adding to the overall climate experience.

April Temperature in Lancaster

In April in Lancaster, the average temperature is 10°C (51°F). Maximum temperatures can reach as high as 29°C (85°F), while the minimum can drop to a chilly -9°C (16°F). Be prepared for a wide range of temperatures to make the most of your travel experience!

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

The chart illustrates April temperature patterns in Lancaster, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Lancaster, April typically has an average temperature of 10°C (51°F), with highs reaching up to 29°C (85°F) and lows dropping to around -9°C (16°F).
JanFebMarAprMayJunJulAugSepOctNovDec262842516475787569544034
Data source: Temperature data for Lancaster 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 Lancaster

In Lancaster in April, the precipitation amount is 84 mm (3.3 in) over a span of 10 days.

April Precipitation Trends in Lancaster

The chart displays monthly precipitation patterns in Lancaster, 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 Lancaster, April typically receives around 84 mm (3.3 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec5453988415212082751161265036
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
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April Humidity in Lancaster

In Lancaster in April humidity is 77%. With an average temperature of 10°C (51°F), this humidity feels like a damp chill that can make outdoor activities somewhat uncomfortable, causing clothes to cling to your skin and breathing to feel heavier, which may deter longer sightseeing adventures.

April Average Humidity in Lancaster

This chart illustrates the average monthly humidity levels in Lancaster, 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 Lancaster is approximately 77%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec78%80%77%78%77%81%81%77%73%75%85%83%
Data source: Humidity data for April generated using information from the Copernicus Climate Change Service.

April UV Index in Lancaster

In Lancaster 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 Lancaster.

Maximum UV Index Levels in Lancaster for April

The chart shows the monthly maximum UV Index (UVI) for Lancaster 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 Lancaster typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3569101111108642
Data source: Lancaster 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 Lancaster Compares to Other Months

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

This table compares monthly weather conditions in Lancaster, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-3°C (26°F)54 mm (2.1 inches)78%moderate
February Weather-2°C (29°F)53 mm (2.1 inches)80%moderate
March Weather6°C (42°F)98 mm (3.9 inches)77%high
April Weather10°C (51°F)84 mm (3.3 inches)77%very high
May Weather18°C (64°F)152 mm (6.0 inches)77%very high
June Weather24°C (75°F)120 mm (4.7 inches)81%extreme
July Weather26°C (79°F)82 mm (3.2 inches)81%extreme
August Weather24°C (75°F)75 mm (2.9 inches)77%very high
September Weather21°C (70°F)116 mm (4.6 inches)73%very high
October Weather12°C (55°F)126 mm (5.0 inches)75%high
November Weather5°C (41°F)50 mm (2.0 inches)85%moderate
December Weather1°C (34°F)36 mm (1.4 inches)83%low

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