United Kingdom · 1991–2020

Best time to visit
Perth.

July leads for comfortable weather in Perth: typically 19.6°C by day, 11.1°C at night, with 76 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortJuly

Typical high19.6°C

Typical low11.1°C

Rain in July76 mm

Comfort

July

July · August · September

65climate match

Beach

July

July · August · September

28climate match

Outdoors

September

September · July · June

80climate match

The weakest month is January, scoring 5 against July’s 65 — days reach only 6.9°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

56.9° / 0.5°

Feb

117.6° / 0.9°

Mar

229.6° / 2.1°

Apr

3712.5° / 4°

May

4815.4° / 6.4°

Jun

5717.5° / 9.4°

Jul

6519.6° / 11.1°

Aug

6119.2° / 10.8°

Sep

5917.1° / 9°

Oct

3313.2° / 6.3°

Nov

169.6° / 2.9°

Dec

77.1° / 0.7°

Monthly climate evidence for Perth — daylight is calculated from latitude, everything else is measured, sea temperature from the nearest open water 36 km away
Month	Day	Night	Rain	Wet days	Sea	Daylight	Comfort	Coverage
January	6.9°C	0.5°C	71 mm	12.1	6.7°C	7 h 28	5	Good coverage
February	7.6°C	0.9°C	57 mm	10	5.9°C	9 h 26	11	Good coverage
March	9.6°C	2.1°C	49 mm	9.6	6.1°C	11 h 37	22	Good coverage
April	12.5°C	4°C	39 mm	8.1	7.4°C	14 h 07	37	Good coverage
May	15.4°C	6.4°C	52 mm	9.9	9.5°C	16 h 20	48	Good coverage
June	17.5°C	9.4°C	66 mm	11	11.9°C	17 h 41	57	Good coverage
July	19.6°C	11.1°C	76 mm	12	13.9°C	17 h 08	65	Good coverage
August	19.2°C	10.8°C	89 mm	11.9	14.4°C	15 h 08	61	Good coverage
September	17.1°C	9°C	48 mm	8.9	13.3°C	12 h 40	59	Good coverage
October	13.2°C	6.3°C	89 mm	11.7	11.8°C	10 h 16	33	Good coverage
November	9.6°C	2.9°C	74 mm	13.1	9.9°C	8 h 04	16	Good coverage
December	7.1°C	0.7°C	63 mm	11.8	8.1°C	6 h 53	7	Good coverage

Records at MYLNEFIELD, 2001–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	14.6°C25 Jan 2003	-9.4°C8 Jan 2010	29 mm7 Jan 2005	195 mm2016 · driest 8 mm in 2019	26
February	15.4°C19 Feb 2017	-12.2°C11 Feb 2021	30 mm4 Feb 2021	138 mm2021 · driest 16 mm in 2004	26
March	21.6°C26 Mar 2012	-9.3°C2 Mar 2001	28 mm12 Mar 2023	133 mm2018 · driest 4 mm in 2012	26
April	22.4°C29 Apr 2025	-3.4°C7 Apr 2013	27 mm2 Apr 2012	101 mm2012 · driest 6 mm in 2017	26
May	26.0°C21 May 2010	-1.8°C11 May 2020	34 mm3 May 2013	130 mm2021 · driest 13 mm in 2001	26
June	26.8°C22 Jun 2026	1.9°C10 Jun 2001	48 mm21 Jun 2012	139 mm2012 · driest 20 mm in 2021	26
July	30.5°C18 Jul 2022	5.5°C7 Jul 2025	41 mm14 Jul 2010	144 mm2010 · driest 19 mm in 2005	25
August	28.8°C13 Aug 2025	2.9°C31 Aug 2012	58 mm10 Aug 2004	256 mm2004 · driest 8 mm in 2003	25
September	25.0°C7 Sep 2023	-0.5°C27 Sep 2020	66 mm3 Sep 2009	104 mm2010 · driest 20 mm in 2007	25
October	19.3°C1 Oct 2002	-3.0°C21 Oct 2002	89 mm19 Oct 2023	301 mm2023 · driest 16 mm in 2003	25
November	17.3°C10 Nov 2022	-6.3°C21 Nov 2016	39 mm1 Nov 2009	147 mm2009 · driest 20 mm in 2013	25
December	14.7°C6 Dec 2016	-13.8°C3 Dec 2010	46 mm20 Dec 2012	150 mm2023 · driest 19 mm in 2004	25

Typical days per month at MYLNEFIELD, 1991–2020
Month	Days 25°C+	Frost nights	Heavy rain (10 mm+)
January	0	12	2
February	0	11	2
March	0	7	1
April	0	3	<1
May	<1	<1	1
June	<1	0	2
July	1	0	2
August	<1	0	3
September	0	<1	1
October	0	1	3
November	0	6	2
December	0	12	1

How often, not how much — every day in MYLNEFIELD’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%	39%	6%	52%	5.6–8.5°C
February	0%	37%	5%	45%	6.6–9.1°C
March	<1%	31%	4%	41%	7.3–11.3°C
April	1%	27%	2%	34%	10.9–13.9°C
May	8%	32%	4%	42%	14.2–17.3°C
June	15%	34%	6%	46%	16.7–19.0°C
July	30%	37%	7%	51%	18.3–21.9°C
August	25%	37%	7%	47%	18.5–20.5°C
September	11%	30%	4%	40%	16.2–18.4°C
October	0%	40%	9%	58%	12.2–14.3°C
November	0%	43%	7%	59%	8.1–10.8°C
December	0%	39%	6%	53%	5.6–8.6°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.

2001Each stripe is one year’s mean temperature against the 23-year average. Warmest: 2022. Coolest: 2010.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 2640358
NOAA station: UKE00105642 · MYLNEFIELD
Station distance: 23 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 19 usable years
Daylight: Calculated from latitude 56.40°, mid-month, sunrise to sunset including refraction. Not a station measurement.
Sea temperature: NOAA OISST v2.1 1991–2020 monthly climatology, nearest open water 36 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 MYLNEFIELD is what differs

Dundee→Forfar→Blairgowrie and Rattray→Brechin→Kirriemuir→Scone→

Or put two places side by side: Perth vs Dundee

Best time to visitPerth.

July

July

September

The whole year,without the guesswork.

Nearby, measured,and named.

Best time to visit
Perth.

The whole year,
without the guesswork.

Nearby, measured,
and named.