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France · 1991–2020

Best time to visit
Bayonne.

June leads for comfortable weather in Bayonne: typically 23.4°C by day, 15.3°C at night, with 110 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortJune

Typical high23.4°C

Typical low15.3°C

Rain in June110 mm

Comfort

June

June · September · July

80climate match

Beach

July

July · August · June

65climate match

Outdoors

May

May · April · June

66climate match

The weakest month is January, scoring 16 against June’s 80 — days reach only 13.6°C, 10° below the 24°C the score treats as ideal, and 188 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

1613.6° / 5.2°

Feb

2314.2° / 5.5°

Mar

3716.5° / 7.4°

Apr

4618° / 9.1°

May

6421° / 12.2°

Jun

8023.4° / 15.3°

Jul

7925.2° / 17.6°

Aug

7426° / 17.9°

Sep

8024.3° / 15.1°

Oct

5421.2° / 12.1°

Nov

2316.7° / 8.2°

Dec

2314.3° / 6.1°

Monthly climate evidence for Bayonne — daylight is calculated from latitude, everything else is measured, sea temperature from the nearest open water 19 km away
Month	Day	Night	Rain	Wet days	Sea	Daylight	Comfort	Coverage
January	13.6°C	5.2°C	188 mm	15.1	12.6°C	9 h 17	16	Good coverage
February	14.2°C	5.5°C	167 mm	13.1	12.0°C	10 h 25	23	Good coverage
March	16.5°C	7.4°C	146 mm	13.5	12.4°C	11 h 47	37	Good coverage
April	18°C	9.1°C	132 mm	13.8	13.6°C	13 h 21	46	Good coverage
May	21°C	12.2°C	128 mm	12.5	15.9°C	14 h 40	64	Good coverage
June	23.4°C	15.3°C	110 mm	10.8	18.9°C	15 h 24	80	Good coverage
July	25.2°C	17.6°C	80 mm	9.1	21.2°C	15 h 07	79	Good coverage
August	26°C	17.9°C	92 mm	9.6	22.1°C	13 h 58	74	Good coverage
September	24.3°C	15.1°C	134 mm	9.1	20.7°C	12 h 27	80	Good coverage
October	21.2°C	12.1°C	195 mm	13	18.3°C	10 h 56	54	Good coverage
November	16.7°C	8.2°C	247 mm	14.5	15.7°C	9 h 37	23	Good coverage
December	14.3°C	6.1°C	180 mm	13	13.7°C	8 h 58	23	Good coverage

Records at SAN SEBASTIAN/FUENTERRABIA, 1973–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	25.1°C1 Jan 2022	-8.5°C16 Jan 1985	126 mm10 Jan 2025	395 mm2014 · driest 5 mm in 1979	50
February	27.6°C26 Feb 1994	-6.3°C12 Feb 2012	68 mm1 Feb 1978	364 mm2016 · driest 9 mm in 1985	51
March	31.1°C29 Mar 2023	-2.8°C3 Mar 1988	105 mm11 Mar 1978	334 mm1978 · driest 10 mm in 1997	50
April	32.7°C17 Apr 2013	0.0°C2 Apr 1974	93 mm27 Apr 2015	302 mm1994 · driest 0 mm in 1982	51
May	36.6°C30 May 1996	0.0°C8 May 1977	96 mm27 May 1982	338 mm2013 · driest 7 mm in 1989	51
June	39.8°C24 Jun 2026	6.4°C6 Jun 1984	110 mm17 Jun 2010	255 mm2021 · driest 9 mm in 1995	51
July	40.4°C25 Jul 1995	11.0°C3 Jul 1978	80 mm2 Jul 1993	264 mm2011 · driest 9 mm in 1986	50
August	41.9°C11 Aug 2024	8.0°C31 Aug 1974	258 mm15 Aug 1982	327 mm1982 · driest 11 mm in 1989	50
September	37.4°C12 Sep 2016	5.0°C21 Sep 1977	140 mm26 Sep 2020	377 mm2024 · driest 1 mm in 1977	49
October	33.9°C2 Oct 2023	0.7°C29 Oct 2012	131 mm16 Oct 1994	399 mm2000 · driest 3 mm in 1983	50
November	29.8°C8 Nov 2015	-4.8°C23 Nov 1988	86 mm5 Nov 2017	529 mm2019 · driest 0 mm in 1983	50
December	24.8°C19 Dec 2015	-7.2°C25 Dec 2001	144 mm17 Dec 1986	489 mm2020 · driest 2 mm in 1989	48

Typical days per month at SAN SEBASTIAN/FUENTERRABIA, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)
January	0	0	2	5
February	<1	0	1	4
March	<1	0	<1	4
April	2	<1	0	4
May	5	1	0	3
June	7	2	0	3
July	13	2	0	2
August	16	3	0	2
September	11	2	0	3
October	6	<1	0	5
November	<1	0	<1	7
December	0	0	1	5

How often, not how much — every day in SAN SEBASTIAN/FUENTERRABIA’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	3%	51%	24%	61%	10.9–15.9°C
February	8%	51%	23%	58%	11.1–17.8°C
March	14%	51%	20%	63%	14.6–18.5°C
April	18%	54%	20%	63%	15.6–20.2°C
May	34%	47%	17%	51%	18.3–22.7°C
June	53%	44%	14%	48%	21.3–24.8°C
July	63%	37%	11%	37%	23.1–26.5°C
August	63%	37%	13%	36%	24.5–27.3°C
September	59%	40%	19%	44%	22.7–26.0°C
October	43%	45%	23%	45%	18.9–24.0°C
November	18%	54%	33%	63%	14.3–18.8°C
December	6%	51%	24%	56%	11.5–16.6°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.

1975Each stripe is one year’s mean temperature against the 30-year average. Warmest: 2022. Coolest: 1975.2024

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 3034475
NOAA station: SPE00120134 · SAN SEBASTIAN/FUENTERRABIA
Station distance: 29.3 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 18 usable years
Daylight: Calculated from latitude 43.49°, mid-month, sunrise to sunset including refraction. Not a station measurement.
Sea temperature: NOAA OISST v2.1 1991–2020 monthly climatology, nearest open water 19 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 SAN SEBASTIAN/FUENTERRABIA is what differs

Irun→Anglet→Errenteria→Biarritz→Hondarribia→Saint-Jean-de-Luz→

Or put two places side by side: Bayonne vs Irun

Best time to visitBayonne.

June

July

May

The whole year,without the guesswork.

Nearby, measured,and named.

Best time to visit
Bayonne.

The whole year,
without the guesswork.

Nearby, measured,
and named.