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April Weather in Saint Helen, United States

Last updated: June 24, 2025

In April, the average temperature in Saint Helen, United States hovers around 6°C (43°F), with a striking range between a chilly -16°C (4°F) and a warm 26°C (80°F). Expect about 94 mm (3.7 in) of precipitation spread across 12 days, and an average humidity of 85% that adds to the atmospheric charm of the season.

April Temperature in Saint Helen

In April in Saint Helen, the average temperature is 6°C (43°F), with maximums reaching 26°C (80°F) and minimums dropping as low as -16°C (4°F). Be prepared for a wide range of temperatures when traveling to Saint Helen during this time.

April Weather in Saint Helen: Daily Temperature Highs, Lows, and Averages

The chart illustrates April temperature patterns in Saint Helen, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Saint Helen, April typically has an average temperature of 6°C (43°F), with highs reaching up to 26°C (80°F) and lows dropping to around -16°C (4°F).
JanFebMarAprMayJunJulAugSepOctNovDec212232425666716861493528
Data source: Temperature data for Saint Helen 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 Saint Helen

In Saint Helen in April, the precipitation amount is 94 mm (3.7 in) spread over 12 days.

April Precipitation Trends in Saint Helen

The chart displays monthly precipitation patterns in Saint Helen, 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 Saint Helen, April typically receives around 94 mm (3.7 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec515154941121149189761255862
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
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April Humidity in Saint Helen

In Saint Helen in April, humidity is 85%. With an average temperature of 6°C (43°F), this humidity feels like a damp chill that seeps into your bones, making travel feel more uncomfortable and limiting your enjoyment of the sights as you navigate the wet, brisk air.

April Average Humidity in Saint Helen

This chart illustrates the average monthly humidity levels in Saint Helen, 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 Saint Helen is approximately 85%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec92%91%87%86%79%75%75%75%79%85%88%89%
Data source: Humidity data for April generated using information from the Copernicus Climate Change Service.

April UV Index in Saint Helen

In Saint Helen 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 Saint Helen.

Maximum UV Index Levels in Saint Helen for April

The chart shows the monthly maximum UV Index (UVI) for Saint Helen 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 Saint Helen typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2458910987532
Data source: Saint Helen 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 Saint Helen Compares to Other Months

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

This table compares monthly weather conditions in Saint Helen, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-6°C (22°F)51 mm (2.0 inches)92%low
February Weather-6°C (22°F)51 mm (2.0 inches)91%moderate
March Weather0°C (32°F)54 mm (2.1 inches)87%moderate
April Weather6°C (43°F)94 mm (3.7 inches)85%very high
May Weather13°C (56°F)111 mm (4.4 inches)79%very high
June Weather19°C (66°F)114 mm (4.5 inches)75%very high
July Weather22°C (72°F)91 mm (3.6 inches)75%very high
August Weather20°C (69°F)89 mm (3.5 inches)75%very high
September Weather16°C (61°F)76 mm (3.0 inches)79%high
October Weather10°C (49°F)124 mm (4.9 inches)85%moderate
November Weather2°C (35°F)58 mm (2.3 inches)88%moderate
December Weather-2°C (28°F)62 mm (2.4 inches)89%low

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