Last updated: March 2, 2024
The weather in Warsaw, United States, during September is characterized by an average temperature of 23°C (74°F). Highs can soar to 32°C (91°F), while lows may dip to 14°C (57°F). Typically, the humidity level in Warsaw throughout September hovers around 78%.
Minimum temperature
Average temperature
Maximum temperature
Humidity
In September, Warsaw averages 108 mm (4.3 inches) of rainfall, typically over the course of 11 rainy days. The month enjoys an average of 12 hours 22 minutes of daylight, with the sun shining for approximately 9 hours 37 minutes each day. Additionally, there is a 56% probability of sunny days during this period.
Precipitation
Rainy days
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Chance of sun
In September, the UV Index in Warsaw reaches a maximum of 8, indicating a level of VeryHigh exposure. The most intense UV radiation typically occurs between 12:00 and 14:00, 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 | 2 | 4 | 6 | 8 | 8 | 8 | 6 | 4 | 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 | ||||||