Last updated: June 24, 2025
In August, the average temperature in New Haven, United States hovers around 23°C (74°F), offering a pleasant climate for outdoor activities. Expect temperatures to range from a minimum of 15°C (59°F) to a maximum of 31°C (88°F). With an average humidity of 65%, the weather can feel comfortable yet slightly sticky. Keep in mind, however, that precipitation can reach 96 mm (3.8 in) over approximately 11 days, so don't forget your umbrella!
In August in New Haven, the average temperature is 23°C (74°F), with maximums reaching up to 31°C (88°F) and minimums dipping as low as 15°C (59°F). This pleasant climate makes New Haven an ideal destination for travelers looking to enjoy comfortable weather and outdoor activities.
In New Haven in August, the precipitation amount is 96 mm (3.8 in) spread over 11 days, resulting in a significant accumulation of rainfall.
In New Haven in August, humidity is 65%. With an average temperature of 23°C (74°F), this humidity feels like a warm, sticky embrace, making outdoor activities somewhat challenging but still enjoyable with the right planning.
In New Haven in August, 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 New Haven.
UV Risk Categories
Weather in New Haven varies notably across the year, with each month offering distinct climate conditions. This page compares August’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 |