Last updated: June 24, 2025
In Wilkes-Barre, United States, the average temperature in September hovers around 18°C (65°F). While you might enjoy pleasant days, be prepared for temperatures that can dip as low as 2°C (36°F) or soar to a maximum of 31°C (89°F). Expect some rain too, with a total precipitation of 102 mm (4.0 in) spread over 9 days. On top of that, the average humidity sits at a comfortable 66%, making the climate feel just right for outdoor adventures!
In September, in Wilkes-Barre, the average temperature is 18°C (65°F). Maximums can reach 31°C (89°F) and minimums can be as low as 2°C (36°F). This makes Wilkes-Barre an ideal destination for travelers seeking a mild climate with the possibility of warm days and cool evenings.
In Wilkes-Barre in September, the total precipitation amount is 102 mm (4.0 in) over a span of 9 days.
In Wilkes-Barre in September humidity is 66%. With an average temperature of 18°C (65°F), this humidity feels like a warm embrace, making travel comfortable yet slightly sticky, perfect for leisurely strolls but requiring light, breathable clothing to fully enjoy the experience.
In Wilkes-Barre 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 Wilkes-Barre.
UV Risk Categories
Weather in Wilkes-Barre varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Wilkes-Barre, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -2°C (29°F) | 71 mm (2.8 inches) | 87% | moderate |
| February Weather | 0°C (32°F) | 96 mm (3.8 inches) | 85% | moderate |
| March Weather | 3°C (38°F) | 88 mm (3.5 inches) | 85% | high |
| April Weather | 9°C (49°F) | 102 mm (4.0 inches) | 83% | very high |
| May Weather | 15°C (60°F) | 122 mm (4.8 inches) | 75% | very high |
| June Weather | 20°C (68°F) | 95 mm (3.7 inches) | 73% | very high |
| July Weather | 23°C (74°F) | 118 mm (4.6 inches) | 65% | very high |
| August Weather | 22°C (72°F) | 121 mm (4.8 inches) | 62% | very high |
| September Weather | 18°C (65°F) | 102 mm (4.0 inches) | 66% | very high |
| October Weather | 13°C (55°F) | 114 mm (4.5 inches) | 79% | high |
| November Weather | 5°C (41°F) | 87 mm (3.4 inches) | 87% | moderate |
| December Weather | 1°C (34°F) | 83 mm (3.3 inches) | 85% | low |