Last updated: June 24, 2025
In September, the average temperature in Dunellen, United States hovers around 21°C (70°F), making for a pleasant atmosphere. Expect minimum temperatures to dip to 6°C (44°F) and maximums soaring up to 35°C (96°F). With an average humidity of 68%, the weather feels moderately comfortable. However, be prepared for some rain, as 89 mm (3.5 in) of precipitation may fall over the course of 9 days.
In September in Dunellen, the average temperature is 21°C (70°F). Maximum temperatures can reach 35°C (96°F), while minimum temperatures can dip as low as 6°C (44°F). This weather makes it an ideal time for traveling, allowing for comfortable outdoor adventures and exploration.
In Dunellen in September, the precipitation amount is 89 mm (3.5 in) during a span of 9 days.
In Dunellen in September humidity is 68%. With an average temperature of 21°C (70°F), this humidity feels like a warm embrace, making the air feel slightly heavy and sticky, which can be quite exhausting for travelers.
In Dunellen 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 Dunellen.
UV Risk Categories
Weather in Dunellen varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Dunellen, focusing on differences in temperature, rainfall, humidity, and UV levels.
Temperature | Precipitation | Humidity | UV | |
---|---|---|---|---|
January Weather | 1°C (34°F) | 65 mm (2.6 inches) | 84% | moderate |
February Weather | 3°C (37°F) | 107 mm (4.2 inches) | 82% | moderate |
March Weather | 6°C (43°F) | 107 mm (4.2 inches) | 81% | high |
April Weather | 11°C (53°F) | 110 mm (4.3 inches) | 78% | very high |
May Weather | 17°C (63°F) | 129 mm (5.1 inches) | 69% | very high |
June Weather | 22°C (72°F) | 102 mm (4.0 inches) | 69% | very high |
July Weather | 25°C (78°F) | 140 mm (5.5 inches) | 62% | very high |
August Weather | 24°C (76°F) | 133 mm (5.2 inches) | 65% | very high |
September Weather | 21°C (70°F) | 89 mm (3.5 inches) | 68% | very high |
October Weather | 16°C (60°F) | 136 mm (5.4 inches) | 74% | high |
November Weather | 8°C (46°F) | 82 mm (3.2 inches) | 82% | moderate |
December Weather | 3°C (38°F) | 106 mm (4.2 inches) | 80% | low |