Last updated: March 2, 2024
The weather in Grindavik, Iceland, during September is characterized by an average temperature of 9°C (49°F). Highs can soar to 12°C (55°F), while lows may dip to 4°C (40°F). Typically, the humidity level in Grindavik throughout September hovers around 85%.
Minimum temperature
Average temperature
Maximum temperature
Humidity
In September, Grindavik averages 159 mm (6.2 inches) of rainfall, typically over the course of 20 rainy days. The month enjoys an average of 12 hours 54 minutes of daylight, with the sun shining for approximately 6 hours 46 minutes each day. Additionally, there is a 15% probability of sunny days during this period.
Precipitation
Rainy days
Sunshine hours
Chance of sun
In September, the UV Index in Grindavik reaches a maximum of 3, 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 | 2 | 3 | 3 | 3 | 3 | 2 | 2 | 1 | 1 |
| Exposure | Low | Moderate | Low | ||||||||||
| Time to burn | 45 min | 30 min | 45 min | ||||||||||