Last updated: March 2, 2024
The weather in Slemmestad, Norway, during September is characterized by an average temperature of 13°C (55°F). Highs can soar to 22°C (72°F), while lows may dip to 5°C (41°F). Typically, the humidity level in Slemmestad throughout September hovers around 86%.
Minimum temperature
Average temperature
Maximum temperature
Humidity
In September, Slemmestad averages 106 mm (4.2 inches) of rainfall, typically over the course of 12 rainy days. The month enjoys an average of 12 hours 47 minutes of daylight, with the sun shining for approximately 9 hours 21 minutes each day. Additionally, there is a 25% probability of sunny days during this period.
Precipitation
Rainy days
Sunshine hours
Chance of sun
In September, the UV Index in Slemmestad reaches a maximum of 4, indicating a level of Moderate exposure. The most intense UV radiation typically occurs between 12:00 and 14:00, during which unprotected skin may burn in as little as 30 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 | 1 | 2 | 3 | 4 | 4 | 4 | 3 | 2 | 2 | 1 | 1 |
| Exposure | Low | Moderate | Low | ||||||||||
| Time to burn | 45 min | 30 min | 45 min | ||||||||||