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April Weather in Lewistown, United States

Last updated: June 24, 2025

In Lewistown, United States, the average temperature in April hovers around 11°C (51°F). Be prepared for a range of temperatures, as the minimum can dip to -4°C (26°F), while the mercury may rise to a maximum of 28°C (84°F). During this month, expect 102 mm (4.0 in) of precipitation spread over 13 days, contributing to an average humidity of 88%.

April Temperature in Lewistown

In April in Lewistown, the average temperature is 11°C (51°F), with maximums reaching up to 28°C (84°F) and minimums dropping as low as -4°C (26°F). This wide temperature range means it's advisable to pack layers for your travels, ensuring you're prepared for both warm and chilly moments.

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 (51°F), with highs reaching up to 28°C (84°F) and lows dropping to around -4°C (26°F).
JanFebMarAprMayJunJulAugSepOctNovDec313441516270767467574236
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, precipitation amounts to 102 mm (4.0 in) over the course of 13 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 102 mm (4.0 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec65105941021201011211021291138591
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 88%. With an average temperature of 11°C (51°F), this humidity feels like traveling through a damp, heavy blanket, making every step slightly more laborious and the air thick with moisture, which can be quite uncomfortable for exploration.

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 88%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec90%90%89%88%80%79%74%64%67%81%89%88%
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.
JanFebMarAprMayJunJulAugSepOctNovDec356910101098642
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-1°C (31°F)65 mm (2.6 inches)89%moderate
February Weather1°C (34°F)104 mm (4.1 inches)90%moderate
March Weather5°C (41°F)94 mm (3.7 inches)89%high
April Weather11°C (51°F)102 mm (4.0 inches)88%very high
May Weather17°C (62°F)120 mm (4.7 inches)80%very high
June Weather21°C (71°F)101 mm (4.0 inches)79%very high
July Weather24°C (76°F)121 mm (4.8 inches)74%very high
August Weather23°C (74°F)102 mm (4.0 inches)64%very high
September Weather20°C (68°F)129 mm (5.1 inches)67%very high
October Weather14°C (57°F)113 mm (4.5 inches)81%high
November Weather6°C (42°F)85 mm (3.3 inches)89%moderate
December Weather2°C (36°F)91 mm (3.6 inches)88%low

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