Last updated: June 24, 2025
In Portsmouth Heights, United States, the average temperature in September typically hovers around 24°C (75°F). Expect a range of temperatures, with a minimum of 12°C (54°F) and a maximum of 35°C (95°F). This month also sees an average precipitation of 127 mm (5.0 in) over approximately 13 days, and a notable average humidity of 78%.
In September in Portsmouth Heights, the average temperature is 24°C (75°F), with maximums reaching 35°C (95°F) and minimums dropping to as low as 12°C (54°F). This pleasant weather makes it an ideal time for outdoor activities and exploring the local attractions.
In Portsmouth Heights in September, the total precipitation amount is 127 mm (5.0 in) spread over 13 days.
In Portsmouth Heights in September humidity is 78%. With an average temperature of 24°C (75°F), this humidity feels like a warm blanket wrapping around you, making travel sticky and heavy but also inviting, as long as you're prepared with plenty of water and light clothing.
In Portsmouth Heights in September, 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 Portsmouth Heights.
UV Risk Categories
Weather in Portsmouth Heights varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Portsmouth Heights, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 6°C (43°F) | 90 mm (3.5 inches) | 84% | moderate |
| February Weather | 8°C (47°F) | 99 mm (3.9 inches) | 83% | high |
| March Weather | 10°C (51°F) | 79 mm (3.1 inches) | 82% | very high |
| April Weather | 16°C (60°F) | 97 mm (3.8 inches) | 81% | very high |
| May Weather | 20°C (69°F) | 121 mm (4.7 inches) | 80% | very high |
| June Weather | 24°C (76°F) | 121 mm (4.8 inches) | 82% | very high |
| July Weather | 27°C (81°F) | 142 mm (5.6 inches) | 81% | extreme |
| August Weather | 26°C (79°F) | 169 mm (6.6 inches) | 81% | very high |
| September Weather | 24°C (75°F) | 127 mm (5.0 inches) | 78% | very high |
| October Weather | 19°C (66°F) | 91 mm (3.6 inches) | 80% | very high |
| November Weather | 11°C (53°F) | 78 mm (3.1 inches) | 84% | moderate |
| December Weather | 8°C (47°F) | 89 mm (3.5 inches) | 84% | moderate |