Last updated: June 24, 2025
In Salem, United States, the average temperature in September is a pleasant 19°C (67°F). While you may experience minimum temperatures dipping to 4°C (40°F), don't be surprised by the occasional peak of 33°C (92°F). With 96 mm (3.8 in) of precipitation spread across 9 days, a touch of rain adds to the charm of the season. Don't forget your umbrella, as the average humidity hovers around 75%, giving the air that quintessential tropical feel!
In September in Salem, the average temperature is 19°C (67°F). Maximums can reach 33°C (92°F) while minimums can be as low as 4°C (40°F). This range makes it an ideal time for travelers to enjoy a variety of outdoor activities while also being prepared for cooler evenings.
In Salem in September, the total precipitation amount is 96 mm (3.8 in) spread over a period of 9 days.
In Salem in September humidity is 75%. With an average temperature of 19°C (67°F), this humidity feels like a warm embrace, making travel invigorating yet slightly sticky, as you navigate through the vibrant streets or scenic landscapes.
In Salem 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 Salem.
UV Risk Categories
Weather in Salem varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Salem, focusing on differences in temperature, rainfall, humidity, and UV levels.
Temperature | Precipitation | Humidity | UV | |
---|---|---|---|---|
January Weather | 0°C (32°F) | 70 mm (2.8 inches) | 84% | moderate |
February Weather | 1°C (34°F) | 90 mm (3.5 inches) | 84% | moderate |
March Weather | 4°C (39°F) | 95 mm (3.7 inches) | 82% | high |
April Weather | 9°C (49°F) | 128 mm (5.1 inches) | 79% | very high |
May Weather | 15°C (59°F) | 111 mm (4.4 inches) | 75% | very high |
June Weather | 20°C (69°F) | 95 mm (3.8 inches) | 78% | very high |
July Weather | 24°C (75°F) | 158 mm (6.2 inches) | 76% | very high |
August Weather | 23°C (74°F) | 107 mm (4.2 inches) | 76% | very high |
September Weather | 19°C (67°F) | 96 mm (3.8 inches) | 75% | very high |
October Weather | 14°C (57°F) | 131 mm (5.2 inches) | 75% | high |
November Weather | 7°C (44°F) | 96 mm (3.8 inches) | 80% | moderate |
December Weather | 2°C (36°F) | 133 mm (5.2 inches) | 80% | low |