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Portugal · 1991–2020

Best time to visit
Viana do Castelo.

July leads for comfortable weather in Viana do Castelo: typically 24.9°C by day, 14.8°C at night, with 41 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortJuly

Typical high24.9°C

Typical low14.8°C

Rain in July41 mm

Comfort

July

July · August · June

94climate match

Beach

July

July · August · June

67climate match

Outdoors

June

June · May · July

77climate match

The weakest month is January, scoring 6 against July’s 94 — days reach only 12.2°C, 12° below the 24°C the score treats as ideal, and 231 mm of rain falls.

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

612.2° / 5.6°

Feb

2613.6° / 5.7°

Mar

3416° / 7.4°

Apr

4017.3° / 8.5°

May

6019.8° / 10.7°

Jun

8622.7° / 13.2°

Jul

9424.9° / 14.8°

Aug

9125.2° / 15°

Sep

8223.2° / 13.7°

Oct

4319.4° / 11.4°

Nov

1714.9° / 8.1°

Dec

812.7° / 6.4°

Monthly climate evidence for Viana do Castelo — daylight is calculated from latitude, everything else is measured, sea temperature from the nearest open water 8 km away
Month	Day	Night	Rain	Wet days	Sea	Daylight	Comfort	Coverage
January	12.2°C	5.6°C	231 mm	15	13.8°C	9 h 28	6	Strong coverage
February	13.6°C	5.7°C	147 mm	11.5	13.3°C	10 h 32	26	Strong coverage
March	16°C	7.4°C	159 mm	12.7	13.6°C	11 h 48	34	Strong coverage
April	17.3°C	8.5°C	155 mm	13.3	14.3°C	13 h 16	40	Strong coverage
May	19.8°C	10.7°C	115 mm	10.9	15.4°C	14 h 30	60	Strong coverage
June	22.7°C	13.2°C	58 mm	7	16.6°C	15 h 11	86	Strong coverage
July	24.9°C	14.8°C	41 mm	5	17.1°C	14 h 55	94	Strong coverage
August	25.2°C	15°C	50 mm	5.5	17.3°C	13 h 51	91	Strong coverage
September	23.2°C	13.7°C	101 mm	8.1	17.2°C	12 h 25	82	Strong coverage
October	19.4°C	11.4°C	219 mm	13.2	16.7°C	11 h 01	43	Strong coverage
November	14.9°C	8.1°C	248 mm	14.6	15.7°C	9 h 46	17	Strong coverage
December	12.7°C	6.4°C	240 mm	15	14.5°C	9 h 10	8	Strong coverage

What has changed

Viana do Castelo runs +1.8°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

+1.2

Feb

+1.6

Mar

+1.5

Apr

+2.5

May

+2.8

Jun

+1.4

Jul

+2.3

Aug

+2.5

Sep

+1.8

Oct

+1.9

Nov

+1.0

Dec

+1.5

July daytime highs, 2011–2025. Last recorded: 28.5°C.

Records at VIGO PEINADOR, 1960–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	21.8°C24 Jan 2016	-4.0°C13 Jan 1987	122 mm6 Jan 1974	771 mm1974 · driest 15 mm in 1964	67
February	23.6°C27 Feb 1997	-5.0°C4 Feb 1963	137 mm12 Feb 2016	624 mm1977 · driest 4 mm in 2012	66
March	28.1°C31 Mar 2021	-3.0°C9 Mar 1971	137 mm30 Mar 1962	699 mm1962 · driest 0 mm in 1997	66
April	29.6°C30 Apr 1997	0.0°C6 Apr 1975	77 mm21 Apr 1969	477 mm2000 · driest 13 mm in 2017	66
May	33.6°C11 May 1965	2.0°C3 May 1967	107 mm8 May 1969	402 mm1969 · driest 4 mm in 1976	66
June	38.6°C14 Jun 1981	4.6°C5 Jun 1972	84 mm27 Jun 1974	329 mm1974 · driest 2 mm in 1962	66
July	39.7°C6 Jul 2013	7.6°C26 Jul 1965	48 mm26 Jul 1961	134 mm1971 · driest 0 mm in 2020	65
August	40.8°C7 Aug 2016	8.0°C7 Aug 1962	72 mm30 Aug 1992	133 mm1992 · driest 0 mm in 1981	65
September	36.9°C6 Sep 2016	5.0°C29 Sep 1974	99 mm25 Sep 2024	319 mm1968 · driest 5 mm in 1989	65
October	32.6°C15 Oct 2017	1.0°C29 Oct 2012	172 mm21 Oct 2001	596 mm2023 · driest 4 mm in 2007	65
November	24.6°C22 Nov 1967	-0.8°C26 Nov 1971	110 mm22 Nov 2022	591 mm2000 · driest 1 mm in 1981	65
December	23.2°C2 Dec 1985	-3.4°C31 Dec 1970	175 mm7 Dec 1978	926 mm1978 · driest 23 mm in 1988	65

Typical days per month at VIGO PEINADOR, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)
January	0	0	1	7
February	0	0	<1	5
March	<1	0	<1	6
April	2	0	0	5
May	5	<1	0	5
June	9	3	0	2
July	14	5	0	1
August	14	5	0	2
September	10	2	0	3
October	3	<1	0	6
November	0	0	0	8
December	0	0	<1	8

How often, not how much — every day in VIGO PEINADOR’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	<1%	50%	28%	64%	10.7–13.2°C
February	2%	47%	25%	60%	11.3–15.4°C
March	13%	43%	20%	57%	13.0–17.6°C
April	21%	41%	18%	52%	14.2–19.5°C
May	34%	37%	15%	46%	16.0–21.9°C
June	60%	24%	8%	28%	20.0–24.6°C
July	79%	15%	4%	14%	22.2–27.4°C
August	81%	17%	5%	17%	22.7–27.5°C
September	65%	28%	12%	36%	20.3–25.1°C
October	34%	41%	23%	56%	16.9–21.6°C
November	5%	46%	25%	59%	13.2–16.5°C
December	<1%	49%	28%	63%	11.1–13.7°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.

1961Each stripe is one year’s mean temperature against the 65-year average. Warmest: 2022. Coolest: 1972.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 2732773
NOAA station: SPE00120413 · VIGO PEINADOR
Station distance: 63.1 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 30 usable years
Daylight: Calculated from latitude 41.69°, mid-month, sunrise to sunset including refraction. Not a station measurement.
Sea temperature: NOAA OISST v2.1 1991–2020 monthly climatology, nearest open water 8 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 VIGO PEINADOR is what differs

Vigo→Ponte de Lima→Redondela→Cangas do Morrazo→Ponteareas→Arcos de Valdevez→

Or put two places side by side: Viana do Castelo vs Vigo

Best time to visitViana do Castelo.

July

July

June

The whole year,without the guesswork.

Viana do Castelo runs +1.8°Con the 1961–1990 baseline.

Nearby, measured,and named.

Best time to visit
Viana do Castelo.

The whole year,
without the guesswork.

Viana do Castelo runs +1.8°C
on the 1961–1990 baseline.

Nearby, measured,
and named.