Last updated: June 24, 2025
In September, the average temperature in Seabrook, United States hovers around 18°C (65°F). You'll experience a minimum of 7°C (46°F) and a maximum reaching up to 30°C (86°F), making it a delightful time to explore. However, be prepared for some rain, as the region receives about 78 mm (3.1 in) of precipitation over approximately 8 days. With an average humidity of 71%, the weather balances warmth and moisture, creating a unique atmosphere.
In September in Seabrook, the average temperature is 18°C (65°F), with maximums reaching up to 30°C (86°F) and minimums dropping as low as 7°C (46°F). This mild climate makes Seabrook an ideal destination for outdoor activities and sightseeing during this time of year.
In Seabrook in September, the total precipitation amount is 78 mm (3.1 in) over the course of 8 days.
In Seabrook in September humidity is 71%. With an average temperature of 18°C (65°F), this humidity feels like a warm embrace, making it a bit sticky and muggy, which can be slightly uncomfortable for traveling, especially if you're engaging in outdoor activities or exploring the city on foot.
In Seabrook in September, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in Seabrook.
UV Risk Categories
Weather in Seabrook varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Seabrook, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -1°C (30°F) | 79 mm (3.1 inches) | 86% | low |
| February Weather | 0°C (32°F) | 98 mm (3.9 inches) | 84% | moderate |
| March Weather | 2°C (36°F) | 94 mm (3.7 inches) | 82% | moderate |
| April Weather | 8°C (46°F) | 143 mm (5.6 inches) | 80% | high |
| May Weather | 13°C (55°F) | 83 mm (3.3 inches) | 72% | very high |
| June Weather | 18°C (65°F) | 88 mm (3.5 inches) | 72% | very high |
| July Weather | 22°C (71°F) | 123 mm (4.8 inches) | 67% | very high |
| August Weather | 22°C (71°F) | 71 mm (2.8 inches) | 66% | very high |
| September Weather | 18°C (65°F) | 78 mm (3.1 inches) | 71% | high |
| October Weather | 13°C (56°F) | 142 mm (5.6 inches) | 78% | moderate |
| November Weather | 6°C (43°F) | 108 mm (4.3 inches) | 84% | moderate |
| December Weather | 1°C (34°F) | 133 mm (5.2 inches) | 81% | low |