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France · 1991–2020

Best time to visit
Grosbreuil.

July leads for comfortable weather in Grosbreuil: typically 22.5°C by day, 17.2°C at night, with 32 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortJuly

Typical high22.5°C

Typical low17.2°C

Rain in July32 mm

Comfort

July

July · August · June

89climate match

Beach

August

August · July · June

69climate match

Outdoors

June

June · May · September

85climate match

The weakest month is January, scoring 25 against July’s 89 — days reach only 10°C, 14° 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

2510° / 5.6°

Feb

3110.2° / 5.5°

Mar

4312.7° / 7.4°

Apr

5414.8° / 9.4°

May

7117.9° / 12.4°

Jun

8720.9° / 15.3°

Jul

8922.5° / 17.2°

Aug

8922.8° / 17.5°

Sep

8421° / 15.5°

Oct

6417.8° / 12.7°

Nov

4313.8° / 8.9°

Dec

2810.8° / 6.3°

Monthly climate evidence for Grosbreuil — daylight is calculated from latitude, everything else is measured, sea temperature from the nearest open water 18 km away
Month	Day	Night	Rain	Wet days	Sea	Daylight	Comfort	Coverage
January	10°C	5.6°C	65 mm	10.8	10.3°C	8 h 57	25	Strong coverage
February	10.2°C	5.5°C	43 mm	8.3	9.6°C	10 h 14	31	Strong coverage
March	12.7°C	7.4°C	44 mm	8	10.3°C	11 h 45	43	Strong coverage
April	14.8°C	9.4°C	42 mm	7.8	12.1°C	13 h 30	54	Strong coverage
May	17.9°C	12.4°C	40 mm	7.2	14.6°C	14 h 59	71	Strong coverage
June	20.9°C	15.3°C	33 mm	5.8	17.4°C	15 h 48	87	Strong coverage
July	22.5°C	17.2°C	32 mm	5.4	19.1°C	15 h 29	89	Strong coverage
August	22.8°C	17.5°C	39 mm	4.7	19.8°C	14 h 11	89	Strong coverage
September	21°C	15.5°C	49 mm	6.4	18.5°C	12 h 29	84	Strong coverage
October	17.8°C	12.7°C	71 mm	10.3	16.8°C	10 h 49	64	Strong coverage
November	13.8°C	8.9°C	71 mm	10.7	14.3°C	9 h 20	43	Strong coverage
December	10.8°C	6.3°C	73 mm	11.8	11.8°C	8 h 35	28	Strong coverage

Records at CHASSIRON, 1973–2024
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	20.6°C4 Jan 1991	-9.6°C15 Jan 1985	114 mm2 Jan 1991	162 mm1991 · driest 1 mm in 2000	46
February	20.1°C11 Feb 1994	-6.0°C10 Feb 1986	23 mm11 Feb 1988	141 mm1977 · driest 0 mm in 1993	46
March	24.4°C12 Mar 1989	-5.2°C1 Mar 2005	102 mm2 Mar 1993	150 mm2006 · driest 1 mm in 1974	48
April	26.7°C30 Apr 2005	0.0°C6 Apr 1973	70 mm9 Apr 1994	126 mm1994 · driest 0 mm in 1982	48
May	30.4°C16 May 2002	5.4°C7 May 1997	37 mm11 May 2020	99 mm1984 · driest 0 mm in 1989	48
June	35.4°C26 Jun 2019	4.0°C8 Jun 1973	52 mm25 Jun 1983	95 mm2018 · driest 0 mm in 1988	47
July	35.0°C23 Jul 2019	10.0°C25 Jul 1975	54 mm2 Jul 2018	88 mm1977 · driest 0 mm in 1986	49
August	35.9°C4 Aug 2003	7.8°C13 Aug 1994	62 mm12 Aug 1994	135 mm2014 · driest 0 mm in 1997	48
September	33.4°C12 Sep 2022	8.4°C25 Sep 2002	67 mm13 Sep 1993	146 mm1993 · driest 0 mm in 1985	47
October	29.8°C2 Oct 2023	0.6°C27 Oct 1983	128 mm28 Oct 1990	199 mm1990 · driest 0 mm in 1999	48
November	21.2°C8 Nov 1983	-1.5°C22 Nov 1993	35 mm9 Nov 1984	148 mm1976 · driest 0 mm in 2006	49
December	20.0°C6 Dec 1977	-7.1°C29 Dec 1996	42 mm14 Dec 2012	148 mm2010 · driest 8 mm in 1997	47

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

How often, not how much — every day in CHASSIRON’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%	40%	6%	57%	7.5–11.8°C
February	<1%	34%	5%	46%	7.7–12.4°C
March	2%	31%	3%	40%	11.2–14.2°C
April	6%	28%	3%	28%	13.2–16.3°C
May	23%	28%	4%	30%	16.2–19.8°C
June	48%	22%	4%	29%	19.5–22.7°C
July	72%	19%	3%	17%	20.9–24.6°C
August	74%	19%	3%	16%	21.1–24.3°C
September	57%	21%	5%	29%	19.5–22.7°C
October	18%	33%	7%	44%	16.5–19.8°C
November	1%	38%	7%	52%	11.8–15.5°C
December	0%	41%	7%	56%	8.4–12.6°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.

1976Each stripe is one year’s mean temperature against the 41-year average. Warmest: 2023. Coolest: 2010.2024

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 3014549
NOAA station: FRM00007314 · CHASSIRON
Station distance: 56.6 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 25 usable years
Daylight: Calculated from latitude 46.54°, mid-month, sunrise to sunset including refraction. Not a station measurement.
Sea temperature: NOAA OISST v2.1 1991–2020 monthly climatology, nearest open water 18 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 CHASSIRON is what differs

Les Sables-d'Olonne→Château-d'Olonne→Olonne-sur-Mer→Luçon→Saint-Hilaire de Talmont→La Flotte→

Or put two places side by side: Grosbreuil vs Les Sables-d'Olonne

Best time to visitGrosbreuil.