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Weather extremes

How extreme does Lerwick's weather get?

The hottest, coldest, wettest and snowiest days Lerwick has recorded — the outer limits of what its weather can do, and how far they sit beyond a normal day.

Based on 34 years of daily weather observations (1991–present), from the Lerwick station 3 km away. Updated through August 2025 — an all-time extreme only changes when a more extreme day actually occurs, so some dates are old. That is normal, not stale data.

The four kinds of extreme

The hottest, coldest, wettest and snowiest single days Lerwick has recorded — each shown against what a normal day that time of year looks like.

🔥 Hottest day
74°F Jul 5, 1991

That is about 17°F hotter than a normal July afternoon in Lerwick (typical high near 58°F).

The three most extreme on record

1 74°F Jul 5, 1991
2 73°F Jul 19, 2022
3 72°F Aug 12, 1997
❄️ Coldest night
-1°F Mar 24, 2008

About 36°F colder than a normal March night in Lerwick (typical low near 36°F).

The three most extreme on record

1 -1°F Mar 24, 2008
2 9°F Mar 15, 2005
3 11°F Mar 29, 2009
🌧️ Most rain in one day
4.09 in Oct 26, 1995

About 82% of a typical October's rain in a single day (Lerwick averages roughly 5.0 in across the month).

The three most extreme on record

1 4.09 in Oct 26, 1995
2 3.58 in Aug 10, 2014
3 3.11 in Aug 19, 2004

How hot and cold it gets, month by month

The shaded band is the normal range of daily temperatures for each month. The dots show the most extreme it has ever been — so you can see how far beyond a normal day the records really sit.

-30°-10°10°30°50°70°90° all-time high 74°F JanFebMarAprMayJunJulAugSepOctNovDec
normal range of daily temperatureshottest ever recordedcoldest ever recorded

Lerwick's record heat sits well above even a hot day for the season — July's 74°F is about 17°F beyond a normal hot afternoon. Its record cold is just as far below a normal winter night — the dots mark how rare each extreme really is.

In plain terms

In a normal year, Lerwick's warmest days reach the high 50s°F and its coldest nights drop to the mid-30s°F. But across the record it has gone as high as 74°F and as low as −1°F. A single day has delivered over 4 inches of rain. Those are the outer edges worth knowing if you are moving here, planning a trip, or thinking about a house.
Methodology & sources

Temperature & precipitation — 1991–2020 normals computed from 30 years of daily observations at Lerwick, a weather station, about 3 km from the city centre. The underlying daily records come from NOAA's global station network.

How we build these numbers →