Last updated: June 24, 2025
In September, the average temperature in Welcome, United States typically hovers around 18°C (66°F). Expect daily variations with minimums dropping to 3°C (37°F) and maximums reaching up to 33°C (91°F). Be prepared for some wet days, as 121 mm (4.8 in) of precipitation is likely over approximately 9 days, and the average humidity sits at a comfortable 75%.
In September in Welcome, the average temperature is 18°C (66°F). Maximum temperatures can soar to 33°C (91°F), while minimums can drop as low as 3°C (37°F). Be sure to pack layers to stay comfortable during your travels!
In Welcome in September, the precipitation amount is 121 mm (4.8 in) over the course of 9 days.
In Welcome in September humidity is 75%. With an average temperature of 18°C (66°F), this humidity feels like traveling through a warm, damp sauna, where the air clings to your skin, making each step feel heavier and more laborious, and creating a unique atmosphere that both enlivens the senses and challenges your comfort level.
In Welcome 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 Welcome.
UV Risk Categories
Weather in Welcome varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Welcome, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -8°C (18°F) | 34 mm (1.4 inches) | 82% | moderate |
| February Weather | -8°C (17°F) | 38 mm (1.5 inches) | 84% | moderate |
| March Weather | 1°C (34°F) | 73 mm (2.9 inches) | 80% | moderate |
| April Weather | 7°C (45°F) | 93 mm (3.7 inches) | 81% | very high |
| May Weather | 15°C (60°F) | 141 mm (5.6 inches) | 74% | very high |
| June Weather | 22°C (73°F) | 117 mm (4.6 inches) | 80% | very high |
| July Weather | 23°C (75°F) | 114 mm (4.5 inches) | 80% | very high |
| August Weather | 22°C (71°F) | 110 mm (4.3 inches) | 77% | very high |
| September Weather | 18°C (66°F) | 121 mm (4.8 inches) | 75% | very high |
| October Weather | 9°C (49°F) | 93 mm (3.7 inches) | 80% | moderate |
| November Weather | 2°C (35°F) | 34 mm (1.3 inches) | 87% | moderate |
| December Weather | -4°C (26°F) | 42 mm (1.6 inches) | 83% | moderate |