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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 9°C (49°F). Expect a range from a chilly -5°C (23°F) to a warm 29°C (84°F), offering varied weather experiences throughout the month. You'll likely encounter 51 mm (2.0 in) of precipitation spread over 10 days, contributing to an average humidity level of 84%. Stay prepared for a dynamic climate!

April Temperature in Lewiston

In April in Lewiston, the average temperature is 9°C (49°F). The maximum can reach 29°C (84°F), while the minimum can be as low as -5°C (23°F). This variability in temperature makes Lewiston an intriguing destination for travelers seeking a mix of mild and contrasting weather experiences.

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 9°C (49°F), with highs reaching up to 29°C (84°F) and lows dropping to around -5°C (23°F).
JanFebMarAprMayJunJulAugSepOctNovDec323341495866757564504033
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 51 mm (2.0 in) spread over a period of 10 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 51 mm (2.0 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec5895645147283822526574
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 84%. With an average temperature of 9°C (49°F), this humidity feels like a chilly embrace, making travel uncomfortable as the dampness seeps into your clothes and lingers in the air, leaving you feeling cool yet clammy.

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 84%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec89%89%87%84%78%78%77%64%62%79%87%90%
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.
JanFebMarAprMayJunJulAugSepOctNovDec24689101097532
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 Weather0°C (32°F)58 mm (2.3 inches)89%low
February Weather1°C (33°F)95 mm (3.7 inches)89%moderate
March Weather5°C (41°F)64 mm (2.5 inches)87%high
April Weather9°C (49°F)51 mm (2.0 inches)84%very high
May Weather14°C (58°F)47 mm (1.8 inches)77%very high
June Weather19°C (66°F)28 mm (1.1 inches)78%very high
July Weather24°C (76°F)3 mm (0.1 inches)77%very high
August Weather24°C (75°F)8 mm (0.3 inches)64%very high
September Weather18°C (64°F)22 mm (0.9 inches)62%high
October Weather10°C (50°F)52 mm (2.1 inches)79%moderate
November Weather4°C (40°F)65 mm (2.6 inches)87%moderate
December Weather1°C (33°F)74 mm (2.9 inches)90%low

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