Last updated: June 24, 2025
In September, the average temperature in Marcellus, United States is a pleasant 19°C (67°F). Expect a minimum of 3°C (37°F) and a maximum of 33°C (92°F), making it a month of quite a temperature range. With 85 mm (3.3 in) of precipitation spread over 9 days, don’t forget your umbrella! The average humidity hovers around 78%, adding a touch of warmth to the air.
In September in Marcellus, the average temperature is 19°C (67°F). The maximum can reach 33°C (92°F), while the minimum can drop to as low as 3°C (37°F). This makes it a great time to travel for those who enjoy mild weather during the day but can also appreciate refreshing cool nights.
In Marcellus in September, the precipitation amount is 85 mm (3.3 in) over the course of 9 days.
In Marcellus in September humidity is 78%. With an average temperature of 19°C (67°F), this humidity feels like a warm, heavy blanket enveloping you, making traveling feel both sticky and sluggish as you navigate through the day.
In Marcellus in September, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in Marcellus.
UV Risk Categories
Weather in Marcellus varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Marcellus, focusing on differences in temperature, rainfall, humidity, and UV levels.
Temperature | Precipitation | Humidity | UV | |
---|---|---|---|---|
January Weather | -3°C (27°F) | 74 mm (2.9 inches) | 85% | moderate |
February Weather | -2°C (28°F) | 78 mm (3.1 inches) | 85% | moderate |
March Weather | 3°C (38°F) | 90 mm (3.6 inches) | 86% | high |
April Weather | 8°C (47°F) | 105 mm (4.1 inches) | 87% | very high |
May Weather | 16°C (60°F) | 157 mm (6.2 inches) | 81% | very high |
June Weather | 22°C (71°F) | 129 mm (5.1 inches) | 82% | very high |
July Weather | 24°C (75°F) | 112 mm (4.4 inches) | 81% | very high |
August Weather | 22°C (72°F) | 85 mm (3.4 inches) | 79% | very high |
September Weather | 19°C (67°F) | 85 mm (3.3 inches) | 78% | high |
October Weather | 12°C (54°F) | 141 mm (5.5 inches) | 81% | high |
November Weather | 4°C (40°F) | 74 mm (2.9 inches) | 89% | moderate |
December Weather | 1°C (33°F) | 64 mm (2.5 inches) | 86% | moderate |