Last updated: June 24, 2025
In January, the average temperature in New Haven, United States hovers around 1°C (34°F). Expect a chilly climate, with temperatures dipping as low as -16°C (3°F) and reaching a maximum of 14°C (58°F). This month also brings about 90 mm (3.5 in) of precipitation over 8 days, contributing to an average humidity of 84%. Be prepared for wet and cold conditions!
In January in New Haven, the average temperature is 1°C (34°F). Maximum temperatures can reach 14°C (58°F), while minimums can drop to as low as -16°C (3°F). Therefore, travelers should be prepared for a wide range of temperatures and dress in layers for a comfortable experience.
In New Haven in January, the precipitation amount is 90 mm (3.5 in) spread over 8 days, indicating a relatively wet period for the region.
In New Haven in January humidity is 84%. With an average temperature of 1°C (34°F), this humidity feels like a biting chill that seeps into your bones, making travel uncomfortable and requiring extra layers to keep warm while navigating the damp air.
In New Haven in January, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in New Haven, you can check the information here.
UV Risk Categories
Weather in New Haven varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in New Haven, focusing on differences in temperature, rainfall, humidity, and UV levels.
Temperature | Precipitation | Humidity | UV | |
---|---|---|---|---|
January Weather | 1°C (34°F) | 90 mm (3.5 inches) | 84% | moderate |
February Weather | 1°C (35°F) | 132 mm (5.2 inches) | 82% | moderate |
March Weather | 4°C (39°F) | 109 mm (4.3 inches) | 81% | high |
April Weather | 8°C (47°F) | 153 mm (6.0 inches) | 78% | very high |
May Weather | 14°C (57°F) | 130 mm (5.1 inches) | 69% | very high |
June Weather | 19°C (67°F) | 93 mm (3.7 inches) | 69% | very high |
July Weather | 23°C (74°F) | 132 mm (5.2 inches) | 62% | very high |
August Weather | 23°C (74°F) | 96 mm (3.8 inches) | 65% | very high |
September Weather | 20°C (69°F) | 108 mm (4.3 inches) | 68% | very high |
October Weather | 15°C (60°F) | 171 mm (6.7 inches) | 74% | high |
November Weather | 8°C (47°F) | 112 mm (4.4 inches) | 82% | moderate |
December Weather | 4°C (39°F) | 160 mm (6.3 inches) | 80% | low |