Last updated: June 24, 2025
In September, the average temperature in Salem, United States is a comfortable 22°C (72°F). However, temperatures can vary, with a minimum of 7°C (45°F) and a maximum of 34°C (94°F). Expect 59 mm (2.3 in) of precipitation spread over 6 days and an average humidity of 68%, making for a pleasantly humid climate.
In September in Salem, the average temperature is 22°C (72°F). The maximum can reach 34°C (94°F) and the minimum can be as low as 7°C (45°F). This diverse temperature range makes it a great time for travelers to enjoy a mix of warm and cooler experiences.
In Salem in September, the precipitation amount is 59 mm (2.3 in) over the course of 6 days.
In Salem in September humidity is 68%. With an average temperature of 22°C (72°F), this humidity feels like a warm embrace, slightly stifling but still manageable for traveling, creating an atmosphere that encourages leisurely outdoor activities while prompting occasional breaks for refreshment.
In Salem in September, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check 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 | 1°C (34°F) | 75 mm (3.0 inches) | 83% | moderate |
February Weather | 3°C (37°F) | 96 mm (3.8 inches) | 81% | high |
March Weather | 9°C (48°F) | 136 mm (5.3 inches) | 80% | high |
April Weather | 12°C (55°F) | 152 mm (6.0 inches) | 80% | very high |
May Weather | 18°C (66°F) | 178 mm (7.0 inches) | 83% | very high |
June Weather | 24°C (75°F) | 84 mm (3.3 inches) | 83% | extreme |
July Weather | 26°C (79°F) | 84 mm (3.3 inches) | 76% | extreme |
August Weather | 24°C (76°F) | 101 mm (4.0 inches) | 69% | very high |
September Weather | 22°C (72°F) | 59 mm (2.3 inches) | 68% | very high |
October Weather | 15°C (58°F) | 112 mm (4.4 inches) | 72% | high |
November Weather | 7°C (45°F) | 69 mm (2.7 inches) | 83% | moderate |
December Weather | 4°C (40°F) | 60 mm (2.4 inches) | 86% | moderate |