Last updated: March 2, 2024
The weather in Winthrop Harbor, United States, during September is characterized by an average temperature of 19°C (66°F). Highs can soar to 25°C (77°F), while lows may dip to 12°C (54°F). Typically, the humidity level in Winthrop Harbor throughout September hovers around 79%.
Minimum temperature
Average temperature
Maximum temperature
Humidity
In September, Winthrop Harbor averages 83 mm (3.3 inches) of rainfall, typically over the course of 10 rainy days. The month enjoys an average of 12 hours 25 minutes of daylight, with the sun shining for approximately 9 hours 32 minutes each day. Additionally, there is a 56% probability of sunny days during this period.
Precipitation
Rainy days
Sunshine hours
Chance of sun
In September, the UV Index in Winthrop Harbor reaches a maximum of 8, indicating a level of VeryHigh exposure. The most intense UV radiation typically occurs between 13:00 and 15:00, during which unprotected skin may burn in as little as 15 minutes.
| 07:00 | 08:00 | 09:00 | 10:00 | 11:00 | 12:00 | 13:00 | 14:00 | 15:00 | 16:00 | 17:00 | 18:00 | 19:00 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UVI | 1 | 1 | 3 | 4 | 6 | 7 | 8 | 7 | 5 | 3 | 2 | 1 | 1 |
| Exposure | Low | Moderate | High | VeryHigh | High | Moderate | Low | ||||||
| Time to burn | 45 min | 30 min | 25 min | 15 min | 25 min | 30 min | 45 min | ||||||