Last updated: March 2, 2024
The weather in Grundarhverfi, Iceland, during September is characterized by an average temperature of 8°C (47°F). Highs can soar to 14°C (58°F), while lows may dip to 0°C (32°F). Typically, the humidity level in Grundarhverfi throughout September hovers around 92%.
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Average temperature
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Humidity
In September, Grundarhverfi averages 162 mm (6.4 inches) of rainfall, typically over the course of 20 rainy days. The month enjoys an average of 12 hours 55 minutes of daylight, with the sun shining for approximately 6 hours 1 minutes each day. Additionally, there is a 12% probability of sunny days during this period.
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In September, the UV Index in Grundarhverfi 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 | ||||||||||