Last updated: June 24, 2025
In Story City, United States, the average temperature in September is a pleasant 19°C (67°F). However, temperatures can vary significantly, dipping as low as 3°C (38°F) at night and soaring up to 34°C (93°F) during the day. You can expect about 122 mm (4.8 in) of precipitation over approximately 9 days, resulting in an average humidity level of 75%. Perfect for those who enjoy a mild and somewhat humid climate!
In September in Story City, the average temperature is 19°C (67°F), with maximums reaching 34°C (93°F) and minimums dropping as low as 3°C (38°F). This climate makes it an ideal destination for travelers seeking a mix of warm days and cooler evenings.
In Story City in September, the precipitation amount is 122 mm (4.8 in) over a span of 9 days.
In Story City 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 Story City 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 Story City.
UV Risk Categories
Weather in Story City varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Story City, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -6°C (21°F) | 35 mm (1.4 inches) | 82% | moderate |
| February Weather | -6°C (21°F) | 44 mm (1.7 inches) | 84% | moderate |
| March Weather | 3°C (38°F) | 71 mm (2.8 inches) | 80% | moderate |
| April Weather | 9°C (48°F) | 79 mm (3.1 inches) | 81% | very high |
| May Weather | 16°C (61°F) | 160 mm (6.3 inches) | 74% | very high |
| June Weather | 23°C (74°F) | 110 mm (4.3 inches) | 80% | extreme |
| July Weather | 24°C (76°F) | 88 mm (3.5 inches) | 80% | very high |
| August Weather | 22°C (73°F) | 77 mm (3.0 inches) | 77% | very high |
| September Weather | 19°C (67°F) | 122 mm (4.8 inches) | 75% | very high |
| October Weather | 11°C (51°F) | 126 mm (5.0 inches) | 80% | high |
| November Weather | 3°C (37°F) | 42 mm (1.7 inches) | 87% | moderate |
| December Weather | -2°C (29°F) | 35 mm (1.4 inches) | 83% | moderate |