Last updated: June 24, 2025
In Hartford, United States, the average temperature for May is a comfortable 15°C (59°F). However, you can expect temperature fluctuations with a minimum of 0°C (32°F) and a maximum soaring up to 33°C (92°F). During this month, precipitation averages 85 mm (3.3 in), spread over about 12 days, contributing to an overall humidity level of 76%. Be prepared for a mix of warm days and refreshing rain!
In May in Hartford, the average temperature is 15°C (59°F). The maximum can reach 33°C (92°F), and the minimum can be as low as 0°C (32°F). This makes it a perfect time to enjoy a variety of outdoor activities while being prepared for both warm and cooler conditions.
In Hartford in May, the precipitation amount is 85 mm (3.3 in) over a duration of 12 days.
In Hartford in May humidity is 76%. With an average temperature of 15°C (59°F), this humidity feels like a heavy blanket wrapping around you, making outdoor activities less enjoyable and often leading to a quick sense of fatigue while traveling.
In Hartford in May, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Hartford.
UV Risk Categories
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.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -4°C (25°F) | 78 mm (3.1 inches) | 89% | moderate |
| February Weather | -3°C (27°F) | 91 mm (3.6 inches) | 88% | moderate |
| March Weather | 1°C (34°F) | 72 mm (2.9 inches) | 86% | high |
| April Weather | 8°C (47°F) | 119 mm (4.7 inches) | 84% | very high |
| May Weather | 15°C (59°F) | 85 mm (3.3 inches) | 76% | very high |
| June Weather | 20°C (68°F) | 83 mm (3.3 inches) | 72% | very high |
| July Weather | 23°C (73°F) | 114 mm (4.5 inches) | 66% | very high |
| August Weather | 22°C (71°F) | 84 mm (3.3 inches) | 64% | very high |
| September Weather | 18°C (64°F) | 76 mm (3.0 inches) | 72% | high |
| October Weather | 11°C (53°F) | 141 mm (5.6 inches) | 81% | moderate |
| November Weather | 3°C (38°F) | 104 mm (4.1 inches) | 87% | moderate |
| December Weather | -1°C (30°F) | 94 mm (3.7 inches) | 84% | low |