Last updated: June 24, 2025
In September, the average temperature in New Bethlehem, United States hovers around 18°C (65°F). Visitors can expect a minimum of 2°C (36°F) and a maximum of 32°C (89°F) throughout the month. With an average humidity of 67%, it's a relatively comfortable time to explore. However, be prepared for some rain, as 125 mm (4.9 in) of precipitation is expected over 11 days.
In September in New Bethlehem, the average temperature is 18°C (65°F). Maximum temperatures can reach 32°C (89°F), while minimums can dip as low as 2°C (36°F). Travelers should be prepared for a wide range of temperatures, making it essential to pack layers for comfort during the day and evening.
In New Bethlehem in September, the precipitation amount is 125 mm (4.9 in) over the course of 11 days.
In New Bethlehem in September humidity is 67%. With an average temperature of 18°C (65°F), this humidity feels like a mild blanket wrapping around you, making outdoor activities feel pleasantly refreshing, yet you may find yourself reaching for a drink more often to stay hydrated while exploring the sights.
In New Bethlehem in September, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in New Bethlehem.
UV Risk Categories
Weather in New Bethlehem varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in New Bethlehem, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -2°C (29°F) | 100 mm (3.9 inches) | 89% | moderate |
| February Weather | 0°C (32°F) | 123 mm (4.8 inches) | 90% | moderate |
| March Weather | 4°C (39°F) | 106 mm (4.2 inches) | 89% | high |
| April Weather | 9°C (49°F) | 135 mm (5.3 inches) | 88% | very high |
| May Weather | 15°C (60°F) | 156 mm (6.1 inches) | 80% | very high |
| June Weather | 20°C (68°F) | 139 mm (5.5 inches) | 79% | very high |
| July Weather | 23°C (73°F) | 137 mm (5.4 inches) | 74% | very high |
| August Weather | 22°C (71°F) | 105 mm (4.1 inches) | 64% | very high |
| September Weather | 18°C (65°F) | 125 mm (4.9 inches) | 67% | very high |
| October Weather | 13°C (55°F) | 128 mm (5.0 inches) | 81% | high |
| November Weather | 4°C (40°F) | 100 mm (3.9 inches) | 89% | moderate |
| December Weather | 1°C (34°F) | 106 mm (4.2 inches) | 88% | low |