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April Weather in Lewiston, United States

Last updated: June 24, 2025

In April, the average temperature in Lewiston, United States hovers around 11°C (51°F). Temperatures can swing from a chilly -4°C (26°F) to a warm 28°C (83°F). Expect about 82 mm (3.2 in) of precipitation spread over 9 days, coupled with an average humidity level of 82%. Perfect for those who enjoy a mix of mild weather and occasional rain!

April Temperature in Lewiston

In April in Lewiston, the average temperature is 11°C (51°F). The maximum can reach 28°C (83°F), while the minimum can drop as low as -4°C (26°F). This diverse range of temperatures makes Lewiston an interesting destination for travelers looking to experience both mild and cooler weather.

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

The chart illustrates April temperature patterns in Lewiston, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Lewiston, April typically has an average temperature of 11°C (51°F), with highs reaching up to 28°C (83°F) and lows dropping to around -4°C (26°F).
JanFebMarAprMayJunJulAugSepOctNovDec394144515969777567564639
Data source: Temperature data for Lewiston 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 Lewiston

In Lewiston in April, the total precipitation amount is 82 mm (3.2 in), occurring over a span of 9 days.

April Precipitation Trends in Lewiston

The chart displays monthly precipitation patterns in Lewiston, 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 Lewiston, April typically receives around 82 mm (3.2 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec16315613782621624125297118
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
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April Humidity in Lewiston

In Lewiston in April, humidity is 82%. With an average temperature of 11°C (51°F), this humidity feels like a damp chill that seeps into your bones, making outdoor activities uncomfortable and requiring additional layers to stay warm while exploring.

April Average Humidity in Lewiston

This chart illustrates the average monthly humidity levels in Lewiston, 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 Lewiston is approximately 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%85%85%82%81%79%70%60%62%72%87%86%
Data source: Humidity data for April generated using information from the Copernicus Climate Change Service.

April UV Index in Lewiston

In Lewiston 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 Lewiston.

Maximum UV Index Levels in Lewiston for April

The chart shows the monthly maximum UV Index (UVI) for Lewiston 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 Lewiston typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3579111111109643
Data source: Lewiston 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 Lewiston Compares to Other Months

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

This table compares monthly weather conditions in Lewiston, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather4°C (40°F)163 mm (6.4 inches)86%moderate
February Weather5°C (41°F)156 mm (6.1 inches)85%moderate
March Weather7°C (44°F)137 mm (5.4 inches)85%high
April Weather11°C (51°F)82 mm (3.2 inches)82%very high
May Weather15°C (59°F)62 mm (2.4 inches)81%extreme
June Weather20°C (69°F)15 mm (0.6 inches)79%extreme
July Weather25°C (77°F)2 mm (0.1 inches)70%extreme
August Weather24°C (76°F)4 mm (0.1 inches)60%very high
September Weather20°C (68°F)12 mm (0.5 inches)62%very high
October Weather13°C (56°F)52 mm (2.0 inches)72%high
November Weather8°C (46°F)97 mm (3.8 inches)87%moderate
December Weather4°C (39°F)118 mm (4.6 inches)86%moderate

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