September Weather in Lerwick

Last updated: March 2, 2024

The weather in Lerwick, United Kingdom, during September is characterized by an average temperature of 12°C (54°F). Highs can soar to 14°C (57°F), while lows may dip to 9°C (48°F). Typically, the humidity level in Lerwick throughout September hovers around 87%.

9°C (48°F)

Minimum temperature

12°C (54°F)

Average temperature

14°C (57°F)

Maximum temperature

87%

Humidity

Precipitation and Sunshine hours

In September, Lerwick averages 115 mm (4.5 inches) of rainfall, typically over the course of 18 rainy days. The month enjoys an average of 12 hours 47 minutes of daylight, with the sun shining for approximately 9 hours 30 minutes each day. Additionally, there is a 14% probability of sunny days during this period.

115 mm (4.5 inches)

Precipitation

18 rainy days

Rainy days

9 hours 30 minutes

Sunshine hours

14%

Chance of sun

UV Index

In September, the UV Index in Lerwick 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.

Average solar exposure data for the current time of the year. Actual values may vary and depend on many factors, such as cloud cover, vegetation cover, surface type, etc.
	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	2	3	4	4	4	3	2	2	1	1
Exposure	Low				Moderate					Low
Time to burn	45 min				30 min					45 min