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April Weather in Hartford, United States

Last updated: June 24, 2025

In April, the average temperature in Hartford, United States hovers around 16°C (61°F). Expect a range from a chilly -1°C (31°F) to a warm 33°C (91°F). During this time, the region experiences 137 mm (5.4 in) of precipitation spread over 11 days, accompanied by a notable average humidity of 78%.

April Temperature in Hartford

In April in Hartford, the average temperature is 16°C (61°F), with maximums reaching 33°C (91°F) and minimums dropping as low as -1°C (31°F). This diverse temperature range makes Hartford an intriguing destination for travelers seeking both warm days and cooler nights.

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

The chart illustrates April temperature patterns in Hartford, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Hartford, April typically has an average temperature of 16°C (61°F), with highs reaching up to 33°C (91°F) and lows dropping to around -1°C (31°F).
JanFebMarAprMayJunJulAugSepOctNovDec414455607078818076635146
Data source: Temperature data for Hartford 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 Hartford

In Hartford in April, the total precipitation amount reaches 137 mm (5.4 in) over a span of 11 days.

April Precipitation Trends in Hartford

The chart displays monthly precipitation patterns in Hartford, 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 Hartford, April typically receives around 137 mm (5.4 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec751201141371888782106611236285
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
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April Humidity in Hartford

In Hartford in April, humidity is 78%. With an average temperature of 16°C (61°F), this humidity feels like a warm, sticky embrace, making travel somewhat uncomfortable as it clings to your skin and creates a heavy atmosphere that can drain your energy.

April Average Humidity in Hartford

This chart illustrates the average monthly humidity levels in Hartford, 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 Hartford is approximately 78%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%79%77%78%82%81%75%61%59%69%82%88%
Data source: Humidity data for April generated using information from the Copernicus Climate Change Service.

April UV Index in Hartford

In Hartford in April, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Hartford.

Maximum UV Index Levels in Hartford for April

The chart shows the monthly maximum UV Index (UVI) for Hartford 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 Hartford typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec46710111111109754
Data source: Hartford 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 Hartford Compares to Other Months

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

This table compares monthly weather conditions in Hartford, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (42°F)74 mm (2.9 inches)82%moderate
February Weather7°C (45°F)119 mm (4.7 inches)79%high
March Weather13°C (55°F)114 mm (4.5 inches)77%high
April Weather16°C (61°F)137 mm (5.4 inches)78%very high
May Weather21°C (70°F)188 mm (7.4 inches)82%extreme
June Weather26°C (78°F)87 mm (3.4 inches)81%extreme
July Weather27°C (82°F)82 mm (3.2 inches)75%extreme
August Weather26°C (80°F)106 mm (4.2 inches)61%very high
September Weather24°C (76°F)61 mm (2.4 inches)59%very high
October Weather17°C (63°F)123 mm (4.8 inches)69%high
November Weather11°C (51°F)62 mm (2.5 inches)82%moderate
December Weather8°C (47°F)85 mm (3.4 inches)87%moderate

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