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May Weather in Hartford, United States

Last updated: June 24, 2025

In Hartford, United States during May, the average temperature hovers around 24°C (75°F). Temperatures can vary, with a minimum of 9°C (49°F) and a peak reaching up to 37°C (98°F). Visitors can expect about 102 mm (4.0 in) of precipitation over the course of 11 days, and the average humidity rests at a comfortable 74%.

May Temperature in Hartford

In May in Hartford, the average temperature is 24°C (75°F). Maximums can reach 37°C (98°F), and minimums can be as low as 9°C (49°F). This range of temperatures makes Hartford an ideal destination for travelers seeking warm weather with the option for cooler evenings.

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

The chart illustrates May 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, May typically has an average temperature of 24°C (75°F), with highs reaching up to 37°C (98°F) and lows dropping to around 9°C (49°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.

May Precipitation in Hartford

In Hartford in May, the precipitation amount is 102 mm (4.0 in) over the course of 11 days.

May Precipitation Trends in Hartford

The chart displays monthly precipitation patterns in Hartford, with values for each month alongside May’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how May’s conditions compare to those of other months. In Hartford, May typically receives around 102 mm (4.0 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec90117721081021421321641158343142
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Hartford

In Hartford in May, humidity is 74%. With an average temperature of 24°C (75°F), this humidity feels like a warm blanket wrapping around you, making outdoor exploration both sticky and exhilarating, as the heat clings to your skin while inviting you to seek out refreshing breezes or cool shade.

May Average Humidity in Hartford

This chart illustrates the average monthly humidity levels in Hartford, with May’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In May, average humidity in Hartford is approximately 74%, 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 May generated using information from the Copernicus Climate Change Service.

May UV Index in Hartford

In Hartford in May, 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 May

The chart shows the monthly maximum UV Index (UVI) for Hartford in May, 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 May, the maximum UV index in Hartford typically reaches 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec589111111121110864
Data source: Hartford May 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 May 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 May’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 May’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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