United Kingdom · 1991–2020

Best time to visit
Isle of Bute.

July leads for comfortable weather in Isle of Bute: typically 18.6°C by day, 11.4°C at night, with 100 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortJuly

Typical high18.6°C

Typical low11.4°C

Rain in July100 mm

Comfort

July

July · August · June

56climate match

Beach

July

July · August · June

19climate match

Outdoors

June

June · July · August

68climate match

The weakest month is January, scoring 5 against July’s 56 — 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° / 2.4°

Feb

57.8° / 2.6°

Mar

89.6° / 3.4°

Apr

2412.1° / 4.9°

May

4214.9° / 7°

Jun

5017.1° / 9.5°

Jul

5618.6° / 11.4°

Aug

5318.5° / 11.4°

Sep

4216.2° / 9.9°

Oct

1612.8° / 7.1°

Nov

59.8° / 4.9°

Dec

57.6° / 2.5°

Monthly climate evidence for Isle of Bute — daylight is calculated from latitude, everything else is measured, sea temperature from the nearest open water 6 km away
Month	Day	Night	Rain	Wet days	Sea	Daylight	Comfort	Coverage
January	7.6°C	2.4°C	160 mm	19.3	7.9°C	7 h 35	5	Good coverage
February	7.8°C	2.6°C	118 mm	16.6	7.2°C	9 h 29	5	Good coverage
March	9.6°C	3.4°C	116 mm	16.1	7.2°C	11 h 37	8	Good coverage
April	12.1°C	4.9°C	94 mm	14	8.2°C	14 h 04	24	Good coverage
May	14.9°C	7°C	76 mm	12.5	10.1°C	16 h 14	42	Good coverage
June	17.1°C	9.5°C	91 mm	13.5	12.7°C	17 h 32	50	Good coverage
July	18.6°C	11.4°C	100 mm	14.5	14.6°C	17 h 01	56	Good coverage
August	18.5°C	11.4°C	120 mm	14.7	15.0°C	15 h 04	53	Good coverage
September	16.2°C	9.9°C	121 mm	15.6	13.8°C	12 h 39	42	Good coverage
October	12.8°C	7.1°C	167 mm	18.7	12.3°C	10 h 18	16	Good coverage
November	9.8°C	4.9°C	155 mm	19.4	10.8°C	8 h 09	5	Good coverage
December	7.6°C	2.5°C	152 mm	17.6	9.4°C	7 h 01	5	Good coverage

Records at BUTE: ROTHESAY, 1960–2012
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	14.0°C9 Jan 2005	-8.4°C11 Jan 1982	53 mm7 Jan 1992	285 mm1993 · driest 19 mm in 1963	53
February	14.8°C22 Feb 2012	-5.6°C19 Feb 1960	41 mm11 Feb 1996	240 mm2002 · driest 2 mm in 1986	53
March	19.1°C25 Mar 2012	-4.5°C2 Mar 1986	51 mm18 Mar 1991	221 mm1994 · driest 25 mm in 1996	53
April	22.6°C30 Apr 1990	-4.4°C2 Apr 1968	33 mm20 Apr 1961	164 mm1993 · driest 7 mm in 1974	53
May	25.5°C31 May 1978	-1.6°C6 May 1997	40 mm21 May 2011	209 mm1986 · driest 13 mm in 1978	53
June	28.1°C27 Jun 1995	2.0°C2 Jun 1975	42 mm6 Jun 1990	184 mm2002 · driest 25 mm in 1988	53
July	28.0°C2 Jul 1976	3.9°C30 Jul 1965	51 mm19 Jul 1998	235 mm1985 · driest 31 mm in 1983	52
August	28.5°C3 Aug 1975	4.4°C21 Aug 1964	81 mm10 Aug 2011	298 mm2009 · driest 23 mm in 1976	53
September	25.0°C3 Sep 1991	1.0°C28 Sep 2007	58 mm26 Sep 1981	283 mm1981 · driest 27 mm in 1972	53
October	21.0°C2 Oct 1973	-1.9°C16 Oct 1993	53 mm8 Oct 2011	294 mm2011 · driest 55 mm in 1973	53
November	16.8°C1 Nov 1971	-4.9°C28 Nov 2010	57 mm21 Nov 1968	292 mm2009 · driest 50 mm in 1983	53
December	14.4°C26 Dec 1988	-5.9°C22 Dec 2010	50 mm16 Dec 1989	298 mm1999 · driest 36 mm in 1995	53

Typical days per month at BUTE: ROTHESAY, 1991–2020
Month	Days 25°C+	Frost nights	Heavy rain (10 mm+)
January	0	5	6
February	0	6	4
March	0	3	4
April	0	1	3
May	0	<1	2
June	<1	0	3
July	<1	0	3
August	<1	0	4
September	0	0	4
October	0	<1	6
November	0	2	5
December	0	7	5

How often, not how much — every day in BUTE: ROTHESAY’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%	61%	17%	76%	5.2–8.8°C
February	0%	52%	13%	65%	4.9–8.7°C
March	0%	51%	12%	68%	7.1–10.1°C
April	<1%	43%	8%	57%	9.6–12.8°C
May	5%	41%	6%	54%	12.9–16.3°C
June	13%	43%	9%	59%	15.7–18.3°C
July	17%	44%	10%	66%	16.5–19.9°C
August	15%	48%	12%	66%	16.7–20.0°C
September	2%	55%	17%	74%	14.7–16.8°C
October	<1%	59%	19%	77%	11.3–13.9°C
November	0%	62%	18%	78%	7.9–10.6°C
December	0%	58%	16%	75%	5.7–9.1°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.

1960Each stripe is one year’s mean temperature against the 46-year average. Warmest: 1997. Coolest: 1979.2012

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 8299622
NOAA station: UKE00105931 · BUTE: ROTHESAY
Station distance: 0.6 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 20 usable years
Daylight: Calculated from latitude 55.84°, mid-month, sunrise to sunset including refraction. Not a station measurement.
Sea temperature: NOAA OISST v2.1 1991–2020 monthly climatology, nearest open water 6 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 BUTE: ROTHESAY is what differs

Largs→Isle of Arran→West Kilbride→Rothesay→Inverkip→Wemyss Bay→

Or put two places side by side: Isle of Bute vs Largs

Best time to visitIsle of Bute.

July

July

June

The whole year,without the guesswork.

Nearby, measured,and named.

Best time to visit
Isle of Bute.

The whole year,
without the guesswork.

Nearby, measured,
and named.