Last updated: June 24, 2025
In New Haven, United States, the average temperature in May is a comfortable 19°C (66°F). Expect a range with minimums of 4°C (40°F) and maximums reaching 34°C (93°F). However, be prepared for some rain, as the precipitation averages around 161 mm (6.3 in) over 16 days. With an average humidity of 82%, it's a perfect time to enjoy the mild and often refreshing climate!
In May in New Haven, the average temperature is 19°C (66°F), with maximums reaching 34°C (93°F) and minimums dipping as low as 4°C (40°F). This pleasant range makes it an ideal time to explore and enjoy outdoor activities in New Haven.
In New Haven in May, the total precipitation amount is 161 mm (6.3 in), occurring over a span of 16 days.
In New Haven in May humidity is 82%. With an average temperature of 19°C (66°F), this humidity feels like a warm blanket wrapping around you, making it slightly uncomfortable for traveling as you might find yourself constantly seeking shade or a cool breeze.
In New Haven in May, 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 New Haven.
UV Risk Categories
Weather in New Haven varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in New Haven, focusing on differences in temperature, rainfall, humidity, and UV levels.
Temperature | Precipitation | Humidity | UV | |
---|---|---|---|---|
January Weather | 0°C (33°F) | 74 mm (2.9 inches) | 82% | moderate |
February Weather | 2°C (36°F) | 79 mm (3.1 inches) | 80% | moderate |
March Weather | 8°C (47°F) | 128 mm (5.1 inches) | 80% | high |
April Weather | 13°C (55°F) | 128 mm (5.0 inches) | 80% | very high |
May Weather | 19°C (66°F) | 161 mm (6.3 inches) | 82% | very high |
June Weather | 24°C (76°F) | 87 mm (3.4 inches) | 83% | extreme |
July Weather | 26°C (79°F) | 102 mm (4.0 inches) | 81% | extreme |
August Weather | 24°C (76°F) | 141 mm (5.5 inches) | 80% | very high |
September Weather | 22°C (72°F) | 52 mm (2.0 inches) | 76% | very high |
October Weather | 15°C (59°F) | 104 mm (4.1 inches) | 76% | high |
November Weather | 7°C (45°F) | 67 mm (2.6 inches) | 85% | moderate |
December Weather | 4°C (39°F) | 51 mm (2.0 inches) | 86% | moderate |