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April Weather in Lancaster, United States

Last updated: June 24, 2025

In Lancaster, United States, the average temperature in April is a mild 13°C (56°F). However, temperatures can range dramatically, with minimums dipping to -3°C (27°F) and maximums soaring to 30°C (87°F). Expect a fair amount of rain, with precipitation totaling 138 mm (5.4 in) over about 12 days in the month. The air feels quite humid, with an average humidity level of 84%.

April Temperature in Lancaster

In April in Lancaster, the average temperature is 13°C (56°F). Maximum temperatures can reach 30°C (87°F), while the minimum can drop as low as -3°C (27°F). Travelers should be prepared for a wide range of temperatures, making layering clothing a smart choice for this time of year.

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 13°C (56°F), with highs reaching up to 30°C (87°F) and lows dropping to around -3°C (27°F).
JanFebMarAprMayJunJulAugSepOctNovDec374249566773777671614642
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 138 mm (5.4 in) spread over a period of 12 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 138 mm (5.4 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec9716713613813515810211412611785140
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 84%. With an average temperature of 13°C (56°F), this humidity feels like a damp blanket wrapping around you, making it feel cooler and more uncomfortable for traveling, as the air clings to your skin and weighs you down with a sense of heaviness.

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 84%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%88%87%84%84%83%79%66%67%76%89%88%
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.
JanFebMarAprMayJunJulAugSepOctNovDec3679101111109753
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 Weather3°C (37°F)97 mm (3.8 inches)88%moderate
February Weather6°C (42°F)167 mm (6.6 inches)88%high
March Weather9°C (49°F)136 mm (5.4 inches)87%high
April Weather13°C (56°F)138 mm (5.4 inches)84%very high
May Weather19°C (67°F)135 mm (5.3 inches)84%very high
June Weather23°C (73°F)158 mm (6.2 inches)83%extreme
July Weather25°C (78°F)102 mm (4.0 inches)79%extreme
August Weather24°C (76°F)114 mm (4.5 inches)66%very high
September Weather22°C (71°F)126 mm (4.9 inches)67%very high
October Weather16°C (61°F)117 mm (4.6 inches)76%high
November Weather8°C (46°F)85 mm (3.3 inches)89%moderate
December Weather5°C (42°F)140 mm (5.5 inches)88%moderate

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