Last updated: June 24, 2025
In Blennerhassett, United States, the average temperature in September hovers around 21°C (70°F), offering a pleasant climate for outdoor activities. However, temperatures can fluctuate significantly, with a minimum of 5°C (42°F) and a maximum soaring to 37°C (98°F). Be prepared for some rainfall, as 104 mm (4.1 in) of precipitation is expected over 9 days, accompanied by an average humidity level of 73%.
In September in Blennerhassett, the average temperature is 21°C (70°F). Maximum temperatures can reach 37°C (98°F), while minimums can dip as low as 5°C (42°F). Travelers should be prepared for a wide range of temperatures, so it's advisable to pack both lightweight clothing and warmer layers for the cooler evenings.
In Blennerhassett in September, the precipitation amount is 104 mm (4.1 in) over the course of 9 days.
In Blennerhassett in September, humidity is 73%. With an average temperature of 21°C (70°F), this humidity feels like a warm embrace that can make outdoor activities feel sweltering, so it's essential to stay hydrated and take breaks in the shade while exploring.
In Blennerhassett 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 Blennerhassett.
UV Risk Categories
Weather in Blennerhassett varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Blennerhassett, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 1°C (34°F) | 91 mm (3.6 inches) | 88% | moderate |
| February Weather | 4°C (39°F) | 125 mm (4.9 inches) | 88% | moderate |
| March Weather | 7°C (46°F) | 115 mm (4.5 inches) | 88% | high |
| April Weather | 12°C (55°F) | 143 mm (5.6 inches) | 86% | very high |
| May Weather | 18°C (65°F) | 147 mm (5.8 inches) | 82% | very high |
| June Weather | 22°C (72°F) | 153 mm (6.0 inches) | 84% | very high |
| July Weather | 25°C (77°F) | 112 mm (4.4 inches) | 82% | very high |
| August Weather | 24°C (75°F) | 123 mm (4.8 inches) | 73% | very high |
| September Weather | 21°C (70°F) | 104 mm (4.1 inches) | 73% | very high |
| October Weather | 15°C (60°F) | 113 mm (4.4 inches) | 81% | high |
| November Weather | 7°C (45°F) | 82 mm (3.2 inches) | 89% | moderate |
| December Weather | 4°C (39°F) | 117 mm (4.6 inches) | 86% | moderate |