April Weather in Lewiston, United States

Last updated: June 24, 2025

In April, the average temperature in Lewiston, United States hovers around 7°C (44°F). Expect a range where the minimum can dip to -4°C (24°F) while the maximum might reach 25°C (77°F). Be prepared for about 116 mm (4.6 in) of precipitation spread over 12 days, and don’t forget that the average humidity is a notable 80%.

April Temperature in Lewiston

In April in Lewiston, the average temperature is 7°C (44°F). The maximum can reach 25°C (77°F), while the minimum can drop as low as -4°C (24°F). Travelers should be prepared for a wide range of temperatures and pack accordingly for varying weather conditions.

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 7°C (44°F), with highs reaching up to 25°C (77°F) and lows dropping to around -4°C (24°F).
JanFebMarAprMayJunJulAugSepOctNovDec242632445465717063523928
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 precipitation amount is 116 mm (4.6 in) over a span of 12 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 116 mm (4.6 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec81877311678701277968127110116
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 80%. With an average temperature of 7°C (44°F), this humidity feels like a chilly dampness that clings to your skin, making it essential to dress in layers and be prepared for a slightly uncomfortable but invigorating travel experience.

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 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%84%82%80%72%72%67%66%71%79%84%81%
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 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to 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 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2458910987532
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 Weather-4°C (24°F)81 mm (3.2 inches)86%low
February Weather-3°C (26°F)87 mm (3.4 inches)84%moderate
March Weather0°C (33°F)73 mm (2.9 inches)82%moderate
April Weather7°C (44°F)116 mm (4.6 inches)80%very high
May Weather12°C (55°F)78 mm (3.1 inches)72%very high
June Weather18°C (65°F)70 mm (2.7 inches)72%very high
July Weather21°C (71°F)127 mm (5.0 inches)67%very high
August Weather21°C (70°F)79 mm (3.1 inches)66%very high
September Weather17°C (63°F)68 mm (2.7 inches)71%high
October Weather11°C (52°F)127 mm (5.0 inches)78%moderate
November Weather4°C (39°F)110 mm (4.3 inches)84%moderate
December Weather-2°C (29°F)116 mm (4.6 inches)81%low

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