Last updated: March 2, 2024
The weather in Portlethen, United Kingdom, during September is characterized by an average temperature of 13°C (55°F). Highs can soar to 18°C (65°F), while lows may dip to 7°C (44°F). Typically, the humidity level in Portlethen throughout September hovers around 89%.
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Average temperature
Maximum temperature
Humidity
In September, Portlethen averages 67 mm (2.6 inches) of rainfall, typically over the course of 14 rainy days. The month enjoys an average of 12 hours 42 minutes of daylight, with the sun shining for approximately 10 hours 31 minutes each day. Additionally, there is a 27% probability of sunny days during this period.
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Chance of sun
In September, the UV Index in Portlethen reaches a maximum of 5, indicating a level of Moderate exposure. The most intense UV radiation typically occurs between 13:00 and 15:00, 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 | 2 | 3 | 3 | 4 | 5 | 4 | 4 | 3 | 2 | 1 | 1 |
| Exposure | Low | Moderate | Low | ||||||||||
| Time to burn | 45 min | 30 min | 45 min | ||||||||||