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April Weather in Saint Johnsbury, United States

Last updated: June 24, 2025

In Saint Johnsbury, United States, the average temperature in April hovers around 5°C (42°F), offering a cool climate for visitors. Expect temperature fluctuations ranging from a brisk -9°C (16°F) to a warm 25°C (78°F). With an average precipitation of 110 mm (4.3 in) spread across 14 days, staying dry can be a challenge, while the average humidity sits at a notable 84%, adding to the ambiance of the season.

April Temperature in Saint Johnsbury

In April in Saint Johnsbury, the average temperature is 5°C (42°F), with maximums reaching up to 25°C (78°F) and minimums dropping as low as -9°C (16°F). It's essential to pack for a variety of weather conditions, as this time of year can showcase both warmth and chill.

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

The chart illustrates April temperature patterns in Saint Johnsbury, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Saint Johnsbury, April typically has an average temperature of 5°C (42°F), with highs reaching up to 25°C (78°F) and lows dropping to around -9°C (16°F).
JanFebMarAprMayJunJulAugSepOctNovDec182128425463686659483323
Data source: Temperature data for Saint Johnsbury 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 Johnsbury

In Saint Johnsbury in April, the total precipitation amount is 110 mm (4.3 in) spread over 14 days.

April Precipitation Trends in Saint Johnsbury

The chart displays monthly precipitation patterns in Saint Johnsbury, 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 Johnsbury, April typically receives around 110 mm (4.3 inches) of precipitation spread over approximately 14 days.
JanFebMarAprMayJunJulAugSepOctNovDec8078691109598106886413910385
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
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April Humidity in Saint Johnsbury

In Saint Johnsbury in April, humidity is 84%. With an average temperature of 5°C (42°F), this humidity feels like a thick blanket wrapping around you, making every step feel heavier while traveling.

April Average Humidity in Saint Johnsbury

This chart illustrates the average monthly humidity levels in Saint Johnsbury, 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 Johnsbury is approximately 84%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%89%85%84%78%72%75%74%77%85%86%85%
Data source: Humidity data for April generated using information from the Copernicus Climate Change Service.

April UV Index in Saint Johnsbury

In Saint Johnsbury 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 Johnsbury.

Maximum UV Index Levels in Saint Johnsbury for April

The chart shows the monthly maximum UV Index (UVI) for Saint Johnsbury 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 Johnsbury typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2458910997532
Data source: Saint Johnsbury 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 Johnsbury Compares to Other Months

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

This table compares monthly weather conditions in Saint Johnsbury, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-8°C (18°F)80 mm (3.1 inches)91%low
February Weather-6°C (21°F)78 mm (3.1 inches)89%moderate
March Weather-2°C (29°F)69 mm (2.7 inches)85%moderate
April Weather5°C (42°F)110 mm (4.3 inches)84%very high
May Weather12°C (55°F)95 mm (3.7 inches)78%very high
June Weather17°C (63°F)98 mm (3.9 inches)72%very high
July Weather20°C (69°F)106 mm (4.2 inches)75%very high
August Weather19°C (67°F)88 mm (3.5 inches)74%very high
September Weather15°C (60°F)64 mm (2.5 inches)77%high
October Weather9°C (48°F)138 mm (5.5 inches)85%moderate
November Weather0°C (33°F)103 mm (4.0 inches)86%moderate
December Weather-5°C (23°F)85 mm (3.3 inches)85%low

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