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April Weather in Saint Johns, United States

Last updated: June 24, 2025

In April, the average temperature in Saint Johns, United States is a cool 8°C (47°F). During this month, temperatures can fluctuate significantly, with a minimum of -7°C (19°F) and a maximum reaching up to 28°C (83°F). Expect about 88 mm (3.5 in) of precipitation spread across 13 days, contributing to a relatively high average humidity of 86%.

April Temperature in Saint Johns

In April in Saint Johns, the average temperature is 8°C (47°F). Maximums can reach 28°C (83°F), and minimums can drop as low as -7°C (19°F). This wide range of temperatures means you should pack for both warm and cold weather during your travels.

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

The chart illustrates April temperature patterns in Saint Johns, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Saint Johns, April typically has an average temperature of 8°C (47°F), with highs reaching up to 28°C (83°F) and lows dropping to around -7°C (19°F).
JanFebMarAprMayJunJulAugSepOctNovDec252736465970757265533832
Data source: Temperature data for Saint Johns 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 Johns

In Saint Johns in April, the precipitation amount is 88 mm (3.5 in) spread over 13 days.

April Precipitation Trends in Saint Johns

The chart displays monthly precipitation patterns in Saint Johns, 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 Johns, April typically receives around 88 mm (3.5 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec6366638812111768681011166360
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
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April Humidity in Saint Johns

In Saint Johns in April, humidity is 86%. With an average temperature of 8°C (47°F), this humidity feels like a chilling damp that penetrates your clothes, making outdoor adventures less enjoyable and encouraging you to seek warmth indoors rather than explore the sights.

April Average Humidity in Saint Johns

This chart illustrates the average monthly humidity levels in Saint Johns, 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 Johns is approximately 86%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%87%85%86%80%80%80%81%80%84%90%86%
Data source: Humidity data for April generated using information from the Copernicus Climate Change Service.

April UV Index in Saint Johns

In Saint Johns 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 Johns.

Maximum UV Index Levels in Saint Johns for April

The chart shows the monthly maximum UV Index (UVI) for Saint Johns 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 Johns typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec24589101097532
Data source: Saint Johns 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 Johns Compares to Other Months

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

This table compares monthly weather conditions in Saint Johns, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-4°C (26°F)63 mm (2.5 inches)88%low
February Weather-3°C (27°F)66 mm (2.6 inches)87%moderate
March Weather2°C (36°F)63 mm (2.5 inches)85%moderate
April Weather8°C (47°F)88 mm (3.5 inches)86%very high
May Weather15°C (60°F)121 mm (4.8 inches)80%very high
June Weather21°C (70°F)117 mm (4.6 inches)80%very high
July Weather24°C (75°F)68 mm (2.7 inches)80%very high
August Weather22°C (72°F)68 mm (2.7 inches)80%very high
September Weather18°C (65°F)101 mm (4.0 inches)80%high
October Weather12°C (53°F)116 mm (4.6 inches)84%moderate
November Weather3°C (38°F)63 mm (2.5 inches)89%moderate
December Weather0°C (32°F)60 mm (2.4 inches)86%low

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