United Kingdom · 1991–2020

Best time to visit
Saint Mary's.

July leads for comfortable weather in Saint Mary's: typically 16.4°C by day, 10.5°C at night, with 62 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortJuly

Typical high16.4°C

Typical low10.5°C

Rain in July62 mm

Comfort

July

July · August · June

54climate match

Beach

July

July · August · June

18climate match

Outdoors

July

July · June · August

72climate match

The weakest month is January, scoring 5 against July’s 54 — days reach only 6.7°C, 17° 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

56.7° / 2.3°

Feb

56.9° / 2.2°

Mar

88.2° / 2.8°

Apr

2310.2° / 4.3°

May

3512.5° / 6°

Jun

4714.5° / 8.7°

Jul

5416.4° / 10.5°

Aug

5116.2° / 10.7°

Sep

3914.5° / 9.3°

Oct

1811.8° / 7.2°

Nov

59° / 4.6°

Dec

57.3° / 2.6°

Monthly climate evidence for Saint Mary's — daylight is calculated from latitude, everything else is measured, sea temperature from the nearest open water 4 km away
Month	Day	Night	Rain	Wet days	Sea	Daylight	Comfort	Coverage
January	6.7°C	2.3°C	116 mm	21.2	7.8°C	6 h 56	5	Good coverage
February	6.9°C	2.2°C	84 mm	16	7.1°C	9 h 09	5	Good coverage
March	8.2°C	2.8°C	75 mm	16.1	7.0°C	11 h 34	8	Good coverage
April	10.2°C	4.3°C	55 mm	13.9	7.4°C	14 h 20	23	Good coverage
May	12.5°C	6°C	54 mm	12.2	8.5°C	16 h 50	35	Good coverage
June	14.5°C	8.7°C	54 mm	11.3	10.1°C	18 h 25	47	Good coverage
July	16.4°C	10.5°C	62 mm	12.6	11.8°C	17 h 46	54	Good coverage
August	16.2°C	10.7°C	79 mm	13.5	12.7°C	15 h 28	51	Good coverage
September	14.5°C	9.3°C	93 mm	15.7	12.6°C	12 h 44	39	Good coverage
October	11.8°C	7.2°C	125 mm	19.5	11.8°C	10 h 05	18	Good coverage
November	9°C	4.6°C	121 mm	20.5	10.3°C	7 h 37	5	Good coverage
December	7.3°C	2.6°C	111 mm	20.2	8.9°C	6 h 15	5	Good coverage

Records at KIRKWALL, 2001–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	12.8°C13 Jan 2025	-5.1°C17 Jan 2024	27 mm14 Jan 2023	187 mm2008 · driest 49 mm in 2009	26
February	13.2°C20 Feb 2019	-5.5°C9 Feb 2021	33 mm9 Feb 2019	190 mm2020 · driest 32 mm in 2025	26
March	18.9°C25 Mar 2012	-5.9°C22 Mar 2006	36 mm5 Mar 2002	124 mm2002 · driest 30 mm in 2022	26
April	21.0°C14 Apr 2007	-3.2°C5 Apr 2021	22 mm5 Apr 2022	101 mm2024 · driest 16 mm in 2007	26
May	21.9°C25 May 2017	-1.0°C6 May 2012	22 mm31 May 2026	134 mm2015 · driest 9 mm in 2008	26
June	23.5°C30 Jun 2009	2.4°C14 Jun 2015	45 mm6 Jun 2017	133 mm2025 · driest 16 mm in 2018	26
July	24.1°C1 Jul 2009	4.9°C2 Jul 2020	35 mm29 Jul 2002	119 mm2007 · driest 12 mm in 2021	25
August	24.8°C5 Aug 2003	3.9°C28 Aug 2007	44 mm27 Aug 2011	128 mm2014 · driest 32 mm in 2010	25
September	24.1°C7 Sep 2023	2.0°C18 Sep 2007	35 mm15 Sep 2007	137 mm2018 · driest 31 mm in 2025	25
October	18.9°C5 Oct 2025	-1.1°C28 Oct 2008	50 mm19 Oct 2013	279 mm2006 · driest 37 mm in 2016	25
November	14.9°C10 Nov 2022	-4.1°C28 Nov 2010	50 mm2 Nov 2013	188 mm2017 · driest 74 mm in 2008	25
December	13.6°C23 Dec 2024	-5.7°C18 Dec 2010	29 mm22 Dec 2012	210 mm2014 · driest 1 mm in 2016	25

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

How often, not how much — every day in KIRKWALL’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%	68%	9%	88%	5.7–7.7°C
February	0%	58%	7%	75%	5.9–8.2°C
March	0%	51%	5%	70%	6.6–9.7°C
April	<1%	45%	3%	59%	8.9–11.7°C
May	<1%	39%	3%	52%	11.5–14.0°C
June	2%	38%	4%	54%	13.5–16.1°C
July	5%	39%	4%	50%	15.2–18.1°C
August	2%	42%	6%	61%	15.5–16.9°C
September	1%	52%	8%	72%	13.5–15.8°C
October	0%	64%	12%	87%	10.9–12.7°C
November	0%	68%	10%	90%	7.9–10.1°C
December	0%	66%	9%	87%	5.9–8.5°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.

2002Each stripe is one year’s mean temperature against the 24-year average. Warmest: 2025. Coolest: 2010.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 2638736
NOAA station: UKE00105630 · KIRKWALL
Station distance: 5.6 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 17 usable years
Daylight: Calculated from latitude 58.90°, mid-month, sunrise to sunset including refraction. Not a station measurement.
Sea temperature: NOAA OISST v2.1 1991–2020 monthly climatology, nearest open water 4 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 KIRKWALL is what differs

Kirkwall→Stromness→Pierowall→Saint Margaret's Hope→Whitehall→Scapa→

Or put two places side by side: Saint Mary's vs Kirkwall

Best time to visitSaint Mary's.

July

July

July

The whole year,without the guesswork.

Nearby, measured,and named.

Best time to visit
Saint Mary's.

The whole year,
without the guesswork.

Nearby, measured,
and named.