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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 19°C (67°F). Expect mild conditions, with minimums dipping to 3°C (39°F) and maximums soaring up to 31°C (89°F). Throughout the month, precipitation totals approximately 108 mm (4.3 in) over 9 days, while the average humidity remains comfortably high at 77%.

April Temperature in Hartford

In April, in Hartford, the average temperature is 19°C (67°F). The maximum can reach 31°C (89°F), and the minimum can be as low as 3°C (39°F). This makes it an ideal time for travelers to enjoy a variety of outdoor activities while being prepared for fluctuations in weather.

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 19°C (67°F), with highs reaching up to 31°C (89°F) and lows dropping to around 3°C (39°F).
JanFebMarAprMayJunJulAugSepOctNovDec525863677580818179725955
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 precipitation amount is 108 mm (4.3 in) spread over 9 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 108 mm (4.3 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec90117721081021421321641158343142
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 77%. With an average temperature of 19°C (67°F), this humidity feels like a warm embrace, making travel slightly more challenging as the air clings to your skin, turning every step into a leisurely stroll through a sauna.

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 77%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec83%82%79%77%74%70%78%78%79%74%83%86%
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 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, 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 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec589111111121110864
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 Weather11°C (52°F)90 mm (3.5 inches)83%moderate
February Weather15°C (59°F)117 mm (4.6 inches)82%very high
March Weather17°C (63°F)71 mm (2.8 inches)79%very high
April Weather19°C (67°F)108 mm (4.3 inches)77%extreme
May Weather24°C (75°F)102 mm (4.0 inches)74%extreme
June Weather26°C (80°F)142 mm (5.6 inches)70%extreme
July Weather27°C (81°F)132 mm (5.2 inches)78%extreme
August Weather27°C (81°F)164 mm (6.4 inches)78%extreme
September Weather26°C (79°F)115 mm (4.5 inches)79%very high
October Weather22°C (72°F)83 mm (3.3 inches)74%very high
November Weather15°C (59°F)43 mm (1.7 inches)83%high
December Weather13°C (55°F)142 mm (5.6 inches)86%moderate

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