Last updated: March 2, 2024
The weather in Keystone, United States, during October is characterized by an average temperature of 25°C (78°F). Highs can soar to 33°C (91°F), while lows may dip to 14°C (58°F). Typically, the humidity level in Keystone throughout October hovers around 81%.
Minimum temperature
Average temperature
Maximum temperature
Humidity
In October, Keystone averages 76 mm (3.0 inches) of rainfall, typically over the course of 10 rainy days. The month enjoys an average of 11 hours 27 minutes of daylight, with the sun shining for approximately 9 hours 34 minutes each day. Additionally, there is a 48% probability of sunny days during this period.
Precipitation
Rainy days
Sunshine hours
Chance of sun
In October, the UV Index in Keystone reaches a maximum of 9, 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 | 0 | 1 | 2 | 4 | 6 | 8 | 9 | 9 | 7 | 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 | ||||||