Last updated: June 24, 2025
In September, the average temperature in Chinook, United States hovers around 14°C (58°F). While you might revel in the comfortable warmth, be prepared for a range in temperatures: lows can dip to -2°C (28°F), while peaks can soar up to 34°C (93°F). With an average precipitation of 45 mm (1.8 in) over about 6 days, and a humidity level of 65%, this month offers a unique blend of weather patterns that keep you on your toes!
In September in Chinook, the average temperature is 14°C (58°F), with maximums reaching up to 34°C (93°F) and minimums dropping as low as -2°C (28°F). Travelers should be prepared for a wide range of temperatures during their visit.
In Chinook in September, the precipitation amount is 45 mm (1.8 in) over the course of 6 days.
In Chinook in September, humidity is 65%. With an average temperature of 14°C (58°F), this humidity feels like a mild embrace, creating a slightly damp atmosphere that's comfortable for exploring, but travelers should be prepared for the occasional sticky moment.
In Chinook 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 Chinook.
UV Risk Categories
Weather in Chinook varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Chinook, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -5°C (23°F) | 13 mm (0.5 inches) | 85% | low |
| February Weather | -9°C (16°F) | 31 mm (1.2 inches) | 90% | moderate |
| March Weather | 0°C (31°F) | 23 mm (0.9 inches) | 82% | moderate |
| April Weather | 5°C (41°F) | 32 mm (1.3 inches) | 73% | high |
| May Weather | 12°C (54°F) | 42 mm (1.7 inches) | 73% | very high |
| June Weather | 18°C (64°F) | 52 mm (2.1 inches) | 72% | very high |
| July Weather | 22°C (71°F) | 16 mm (0.6 inches) | 74% | very high |
| August Weather | 20°C (69°F) | 29 mm (1.2 inches) | 71% | very high |
| September Weather | 14°C (58°F) | 45 mm (1.8 inches) | 65% | high |
| October Weather | 6°C (43°F) | 29 mm (1.1 inches) | 68% | moderate |
| November Weather | 1°C (33°F) | 34 mm (1.3 inches) | 81% | moderate |
| December Weather | -4°C (26°F) | 22 mm (0.9 inches) | 89% | low |