Monthly climate guide
Lerwick weather in September
September in Lerwick is typically cool, with average daytime highs around 13°C (55°F) and night-time lows near 11°C (53°F). The month usually brings about 99 mm of rain (wet) and is often cloudy. Daytime highs are about the same as August and 2°C warmer than October.
What stands out in September
- Days and nights are close, only about 1°C apart.
- Lerwick is usually about 3°C cooler than Edinburgh, 480 km away, in September.
- Seasonally, September counts as early autumn in Lerwick.
- September is Lerwick's third warmest month.
Avg high
13°C
55°F
Avg low
11°C
53°F
Rainfall
99 mm
wet
Humidity
87%
relative
Sky
83%
cloud · often cloudy
Lerwick weather by month
Show the monthly averages as a table
| Month | Avg high | Avg low | Rain | Humidity | Cloud cover |
|---|---|---|---|---|---|
| January | 7°C / 45°F | 6°C / 42°F | 117 mm | 81% | 86% |
| February | 7°C / 44°F | 5°C / 42°F | 94 mm | 82% | 84% |
| March | 7°C / 44°F | 5°C / 42°F | 81 mm | 81% | 83% |
| April | 8°C / 46°F | 6°C / 43°F | 51 mm | 82% | 79% |
| May | 9°C / 48°F | 8°C / 46°F | 67 mm | 85% | 79% |
| June | 11°C / 52°F | 10°C / 50°F | 64 mm | 87% | 85% |
| July | 13°C / 55°F | 12°C / 53°F | 75 mm | 89% | 86% |
| August | 14°C / 57°F | 13°C / 55°F | 99 mm | 87% | 80% |
| September | 13°C / 55°F | 11°C / 53°F | 99 mm | 87% | 83% |
| October | 11°C / 52°F | 10°C / 50°F | 119 mm | 83% | 81% |
| November | 10°C / 49°F | 8°C / 46°F | 107 mm | 82% | 83% |
| December | 8°C / 47°F | 7°C / 44°F | 128 mm | 81% | 86% |
What to pack for September
- A warm sweater or fleece for layering
- A mid-weight jacket
- A compact umbrella or packable rain jacket
- Water-resistant shoes
Is September a good time to visit Lerwick?
Compare the months in the chart above to find your ideal window.
Best time to visit Lerwick →Other United Kingdom cities in September
Cite or embed this data
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Lerwick weather in September. WeatherCompare, 2026 (NASA POWER / ERA5, 2011–2020 monthly averages). https://weathercompare.eu/weather/uk/lerwick/september
<a href="https://weathercompare.eu/weather/uk/lerwick/september">Lerwick weather in September</a> (WeatherCompare)
<iframe src="https://weathercompare.eu/embed/uk/lerwick" width="300" height="160" style="border:0;border-radius:12px" loading="lazy" title="Lerwick weather in September"></iframe> <p style="font-size:12px"><a href="https://weathercompare.eu/weather/uk/lerwick/september">Lerwick weather in September</a> – WeatherCompare</p>
Lerwick in September: quick answers
Is September a good time to visit Lerwick?
September is cool in Lerwick, with highs around 13°C. Better for museums and city walks than the beach, and usually quieter.
How warm is Lerwick in September?
Average highs are about 13°C (55°F) and average lows about 11°C (53°F), based on 10 years of daily data.
Does it rain a lot in Lerwick in September?
Lerwick typically gets around 99 mm of rain in September — wet.
Figures are long-term averages for the area around Lerwick (NASA POWER / ERA5, 2011–2020), not a forecast for a specific year. For upcoming days, see the live multi-source forecast.