United Kingdom · 1991–2020

Best time to visit
Isle of Lewis.

July leads for comfortable weather in Isle of Lewis: typically 16.3°C by day, 10.8°C at night, with 75 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortJuly

Typical high16.3°C

Typical low10.8°C

Rain in July75 mm

Comfort

July

July · August · June

51climate match

Beach

July

July · August · June

14climate match

Outdoors

July

July · June · August

66climate match

The weakest month is January, scoring 5 against July’s 51 — days reach only 7.6°C, 16° below the 24°C the score treats as ideal.

Month by month

The whole year,
without the guesswork.

The bars show the comfort score. Day and night temperatures come from daily observed highs and lows; rain is the historical monthly estimate.

Jan

57.6° / 2.6°

Feb

57.6° / 2.4°

Mar

58.6° / 3.1°

Apr

1910.5° / 4.6°

May

3112.7° / 6.3°

Jun

4414.5° / 9°

Jul

5116.3° / 10.8°

Aug

4916.3° / 10.9°

Sep

3714.7° / 9.4°

Oct

1612° / 6.9°

Nov

59.5° / 4.4°

Dec

57.9° / 2.6°

Monthly climate evidence for Isle of Lewis — daylight is calculated from latitude, everything else is measured, sea temperature from the nearest open water 11 km away
Month	Day	Night	Rain	Wet days	Sea	Daylight	Comfort	Coverage
January	7.6°C	2.6°C	145 mm	21.3	8.7°C	7 h 05	5	Strong coverage
February	7.6°C	2.4°C	113 mm	19	7.9°C	9 h 14	5	Strong coverage
March	8.6°C	3.1°C	105 mm	18.5	7.6°C	11 h 35	5	Strong coverage
April	10.5°C	4.6°C	74 mm	16.1	8.0°C	14 h 16	19	Strong coverage
May	12.7°C	6.3°C	69 mm	15	9.3°C	16 h 41	31	Strong coverage
June	14.5°C	9°C	65 mm	14	11.1°C	18 h 12	44	Strong coverage
July	16.3°C	10.8°C	75 mm	15	12.7°C	17 h 35	51	Strong coverage
August	16.3°C	10.9°C	88 mm	15.7	13.4°C	15 h 22	49	Strong coverage
September	14.7°C	9.4°C	104 mm	17	13.1°C	12 h 43	37	Strong coverage
October	12°C	6.9°C	133 mm	21	12.2°C	10 h 08	16	Strong coverage
November	9.5°C	4.4°C	128 mm	21.6	11.2°C	7 h 44	5	Strong coverage
December	7.9°C	2.6°C	139 mm	21.2	9.9°C	6 h 26	5	Strong coverage

What has changed

Isle of Lewis runs +0.9°C
on the 1961–1990 baseline.

Each bar compares the 2011–2025 daytime average for that month against the same month in 1961–1990, measured at the same station. Months where the older record is too thin to compare are left blank.

Jan

+0.7

Feb

+1.1

Mar

+1.0

Apr

+1.2

May

+1.1

Jun

+0.7

Jul

+1.2

Aug

+0.7

Sep

+0.9

Oct

+0.4

Nov

+1.2

Dec

+0.8

July daytime highs, 2011–2025. Last recorded: 18.1°C.

Records at STORNOWAY AIRPORT, 1873–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	14.4°C10 Jan 1998	-12.2°C21 Jan 1960	65 mm19 Jan 1989	276 mm1993 · driest 25 mm in 1963	151
February	13.9°C25 Feb 1900	-11.1°C19 Feb 1892	40 mm4 Feb 1990	280 mm1997 · driest 10 mm in 1963	153
March	20.0°C9 Mar 1949	-10.6°C21 Mar 1881	28 mm22 Mar 1954	208 mm1990 · driest 19 mm in 1969	153
April	20.8°C17 Apr 2003	-8.9°C1 Apr 1917	44 mm27 Apr 1959	146 mm1947 · driest 1 mm in 1974	152
May	23.9°C29 May 1908	-4.4°C8 May 1938	39 mm30 May 2007	153 mm2011 · driest 13 mm in 2008	153
June	25.6°C2 Jun 1911	-0.6°C2 Jun 1888	46 mm4 Jun 1937	115 mm1994 · driest 14 mm in 1982	153
July	26.2°C15 Jul 2003	0.0°C7 Jul 1888	40 mm12 Jul 1939	165 mm1988 · driest 14 mm in 1955	153
August	26.3°C3 Aug 1999	-3.9°C30 Aug 1891	70 mm27 Aug 1933	205 mm1982 · driest 13 mm in 1947	153
September	25.0°C1 Sep 1906	-0.4°C21 Sep 1964	49 mm4 Sep 1936	207 mm1981 · driest 23 mm in 1933	153
October	21.1°C5 Oct 1898	-4.4°C27 Oct 1948	64 mm30 Oct 1989	233 mm1989 · driest 20 mm in 1946	153
November	16.3°C6 Nov 2003	-14.4°C27 Nov 1895	38 mm10 Nov 2022	229 mm1981 · driest 24 mm in 1945	153
December	14.4°C2 Dec 1948	-16.7°C19 Dec 1953	44 mm17 Dec 1989	268 mm2015 · driest 30 mm in 2002	153

Typical days per month at STORNOWAY AIRPORT, 1991–2020
Month	Days 25°C+	Frost nights	Heavy rain (10 mm+)
January	0	5	5
February	0	5	3
March	0	4	3
April	0	2	1
May	0	<1	2
June	0	0	2
July	<1	0	2
August	0	0	2
September	0	0	3
October	0	<1	4
November	0	2	4
December	0	6	4

How often, not how much — every day in STORNOWAY AIRPORT’s record sorted by what it was actually like, rather than averaged
Month	Warm & dry days	Wet days	Washouts	Week with 3+ wet days	Daytime mean has ranged
January	0%	70%	13%	86%	5.3–8.4°C
February	0%	64%	10%	80%	5.4–8.5°C
March	0%	60%	8%	78%	6.4–9.6°C
April	<1%	56%	4%	72%	8.6–11.3°C
May	1%	47%	4%	63%	10.9–13.9°C
June	3%	48%	5%	68%	13.3–15.9°C
July	5%	52%	6%	73%	14.7–17.3°C
August	4%	54%	8%	75%	14.6–17.0°C
September	<1%	62%	11%	80%	13.1–15.5°C
October	0%	70%	13%	87%	10.2–13.0°C
November	0%	72%	12%	89%	7.6–10.5°C
December	0%	72%	13%	89%	5.8–9.0°C

A warm and dry day reaches 20°C with under 1 mm of rain; a wet day gets 1 mm or more; a washout gets 10 mm or more. The week column is the share of seven-day stretches in that month, across the station’s whole daily record, that contained three or more wet days — the odds a week-long trip is rained on repeatedly, counted rather than modelled. The last column is the 10th to 90th percentile of that month’s daytime average across individual years: a narrow band means the average is what you will get, a wide one means the average is a midpoint between years that felt quite different.

1874Each stripe is one year’s mean temperature against the 149-year average. Warmest: 2025. Coolest: 1892.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 8299620
NOAA station: UK000003026 · STORNOWAY AIRPORT
Station distance: 13 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 30 usable years
Daylight: Calculated from latitude 58.22°, mid-month, sunrise to sunset including refraction. Not a station measurement.
Sea temperature: NOAA OISST v2.1 1991–2020 monthly climatology, nearest open water 11 km from the place centre. A sheltered bay can run warmer than the open sea it is measured from.
Important limit: Historical climate is not a forecast. Nearby stations can miss mountains, coasts, and local microclimates.

These places read the same station, so their numbers are identical — distance from STORNOWAY AIRPORT is what differs

Stornoway→Sandwick→Aird Tong→Isle of Scalpay→Drumbeg→Vatisker→

Or put two places side by side: Isle of Lewis vs Stornoway

Best time to visitIsle of Lewis.

July

July

July

The whole year,without the guesswork.

Isle of Lewis runs +0.9°Con the 1961–1990 baseline.

Nearby, measured,and named.

Best time to visit
Isle of Lewis.

The whole year,
without the guesswork.

Isle of Lewis runs +0.9°C
on the 1961–1990 baseline.

Nearby, measured,
and named.