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April Weather in Lewistown, United States

Last updated: June 24, 2025

In Lewistown, United States, the average temperature in April is a mild 11°C (53°F). Expect a range from a chilly -8°C (18°F) to a warm 29°C (85°F). During this time, precipitation averages 100 mm (4.0 in) over 11 days, contributing to a high average humidity of 80%. Whether you're braving the cold or enjoying the warmth, be prepared for a diverse climate experience!

April Temperature in Lewistown

In April in Lewistown, the average temperature is 11°C (53°F). Maximum temperatures can reach 29°C (85°F), while the minimum can drop as low as -8°C (18°F). Travelers should be prepared for a wide range of temperatures when visiting during this time.

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

The chart illustrates April temperature patterns in Lewistown, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Lewistown, April typically has an average temperature of 11°C (53°F), with highs reaching up to 29°C (85°F) and lows dropping to around -8°C (18°F).
JanFebMarAprMayJunJulAugSepOctNovDec283144526576797571564236
Data source: Temperature data for Lewistown 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 Lewistown

In Lewistown in April, the total precipitation amounts to 100 mm (4.0 in) over the course of 11 days.

April Precipitation Trends in Lewistown

The chart displays monthly precipitation patterns in Lewistown, 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 Lewistown, April typically receives around 100 mm (4.0 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec59571151001771059193811145241
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
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April Humidity in Lewistown

In Lewistown in April, humidity is 80%. With an average temperature of 11°C (53°F), this humidity feels like a damp blanket wrapped around you, making it slightly uncomfortable for traveling, as the cool air mixes with the moisture, leaving you feeling chilly and a bit sticky at the same time.

April Average Humidity in Lewistown

This chart illustrates the average monthly humidity levels in Lewistown, 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 Lewistown is approximately 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%80%80%80%82%83%81%80%76%76%85%86%
Data source: Humidity data for April generated using information from the Copernicus Climate Change Service.

April UV Index in Lewistown

In Lewistown 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 Lewistown.

Maximum UV Index Levels in Lewistown for April

The chart shows the monthly maximum UV Index (UVI) for Lewistown 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 Lewistown typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3579101110108643
Data source: Lewistown 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 Lewistown Compares to Other Months

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

This table compares monthly weather conditions in Lewistown, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-2°C (29°F)59 mm (2.3 inches)82%moderate
February Weather-1°C (31°F)57 mm (2.2 inches)80%moderate
March Weather7°C (44°F)115 mm (4.5 inches)80%high
April Weather11°C (53°F)100 mm (4.0 inches)80%very high
May Weather18°C (66°F)177 mm (7.0 inches)82%very high
June Weather24°C (76°F)105 mm (4.1 inches)83%extreme
July Weather26°C (79°F)91 mm (3.6 inches)81%very high
August Weather24°C (76°F)93 mm (3.7 inches)80%very high
September Weather21°C (71°F)81 mm (3.2 inches)76%very high
October Weather14°C (57°F)114 mm (4.5 inches)76%high
November Weather5°C (42°F)52 mm (2.1 inches)85%moderate
December Weather2°C (36°F)41 mm (1.6 inches)86%moderate

Compare Lewistown's Climate with Cities Worldwide