France · 1991–2020

Best time to visit
Castelsarrasin.

June leads for comfortable weather in Castelsarrasin: typically 25.5°C by day, 13.7°C at night, with 73 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortJune

Typical high25.5°C

Typical low13.7°C

Rain in June73 mm

Comfort

June

June · September · July

82climate match

Beach

July

July · August · June

73climate match

Outdoors

October

October · May · April

81climate match

The weakest month is January, scoring 19 against June’s 82 — days reach only 11°C, 13° 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

1911° / 2°

Feb

2912.7° / 1.8°

Mar

4416.4° / 4.2°

Apr

5218.7° / 6.6°

May

7322.3° / 10.3°

Jun

8225.5° / 13.7°

Jul

8027.8° / 15.5°

Aug

7828.3° / 15.4°

Sep

8125° / 11.9°

Oct

6420.4° / 9.2°

Nov

3314.4° / 5°

Dec

2211.5° / 2.5°

Monthly climate evidence for Castelsarrasin — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	11°C	2°C	82 mm	11.4	9 h 13	19	Strong coverage
February	12.7°C	1.8°C	62 mm	9.6	10 h 23	29	Strong coverage
March	16.4°C	4.2°C	69 mm	10.2	11 h 47	44	Strong coverage
April	18.7°C	6.6°C	88 mm	11.8	13 h 23	52	Strong coverage
May	22.3°C	10.3°C	79 mm	10.9	14 h 43	73	Strong coverage
June	25.5°C	13.7°C	73 mm	9.1	15 h 28	82	Strong coverage
July	27.8°C	15.5°C	55 mm	6.9	15 h 10	80	Strong coverage
August	28.3°C	15.4°C	60 mm	7.3	14 h 00	78	Strong coverage
September	25°C	11.9°C	73 mm	8.8	12 h 27	81	Strong coverage
October	20.4°C	9.2°C	85 mm	9.8	10 h 55	64	Strong coverage
November	14.4°C	5°C	105 mm	11.9	9 h 34	33	Strong coverage
December	11.5°C	2.5°C	88 mm	11	8 h 54	22	Strong coverage

What has changed

Castelsarrasin 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

+0.9

Feb

+1.5

Mar

+1.9

Apr

+2.4

May

+1.9

Jun

+2.1

Jul

+1.4

Aug

+2.7

Sep

+1.5

Oct

+1.8

Nov

+1.6

Dec

+2.3

June daytime highs, 2011–2025. Last recorded: 29.5°C.

Records at MONT-DE-MARSAN, 1945–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	23.4°C1 Jan 2022	-19.8°C8 Jan 1985	49 mm31 Jan 2019	199 mm2014 · driest 0 mm in 1945	82
February	26.7°C27 Feb 2019	-16.8°C15 Feb 1956	47 mm12 Feb 1990	190 mm1951 · driest 0 mm in 1945	82
March	30.1°C29 Mar 2023	-11.5°C1 Mar 2005	43 mm16 Mar 1988	153 mm1958 · driest 0 mm in 1961	82
April	32.1°C25 Apr 1947	-5.4°C4 Apr 1996	35 mm21 Apr 1969	242 mm2012 · driest 2 mm in 1982	82
May	35.7°C28 May 2026	-2.5°C2 May 1945	69 mm10 May 2020	232 mm1980 · driest 20 mm in 2011	82
June	41.9°C22 Jun 2026	1.8°C1 Jun 1967	68 mm8 Jun 2013	178 mm1992 · driest 6 mm in 2004	82
July	41.2°C26 Jul 1947	2.0°C29 Jul 1947	61 mm1 Jul 2018	134 mm2011 · driest 0 mm in 2022	81
August	42.5°C1 Aug 1947	4.1°C30 Aug 1986	52 mm5 Aug 1963	199 mm1976 · driest 7 mm in 1955	81
September	39.2°C12 Sep 2022	-0.5°C20 Sep 1962	63 mm14 Sep 1969	206 mm2024 · driest 0 mm in 1985	81
October	33.8°C1 Oct 2023	-6.2°C30 Oct 1949	69 mm6 Oct 1959	257 mm2020 · driest 7 mm in 1978	81
November	26.7°C1 Nov 2020	-10.4°C23 Nov 1988	56 mm23 Nov 1949	366 mm2019 · driest 11 mm in 1978	81
December	23.9°C16 Dec 1989	-14.5°C21 Dec 1946	60 mm13 Dec 1981	323 mm2020 · driest 4 mm in 2015	81

Typical days per month at MONT-DE-MARSAN, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)
January	0	0	11	3
February	<1	0	11	2
March	<1	0	6	2
April	3	<1	2	3
May	9	2	<1	3
June	16	6	0	2
July	22	10	0	2
August	24	10	0	2
September	14	4	0	3
October	5	<1	2	3
November	0	0	5	4
December	0	0	10	3

How often, not how much — every day in MONT-DE-MARSAN’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%	37%	10%	46%	8.2–12.8°C
February	4%	37%	8%	49%	9.5–15.5°C
March	15%	35%	7%	46%	13.7–18.0°C
April	27%	39%	8%	53%	15.4–21.3°C
May	45%	38%	9%	51%	19.1–23.9°C
June	65%	30%	7%	36%	22.3–27.9°C
July	78%	22%	5%	22%	25.0–29.3°C
August	74%	26%	7%	30%	24.9–30.0°C
September	66%	29%	8%	37%	22.1–27.3°C
October	43%	31%	9%	38%	18.1–22.7°C
November	7%	39%	11%	51%	11.9–16.5°C
December	1%	38%	11%	50%	8.0–13.3°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.

1945Each stripe is one year’s mean temperature against the 81-year average. Warmest: 2022. Coolest: 1956.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 3028322
NOAA station: FRE00106203 · MONT-DE-MARSAN
Station distance: 50.7 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 30 usable years
Daylight: Calculated from latitude 44.04°, mid-month, sunrise to sunset including refraction. Not a station measurement.
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 MONT-DE-MARSAN is what differs

Agen→Auch→Moissac→Tonneins→Le Passage→Condom→

Or put two places side by side: Castelsarrasin vs Agen

Best time to visitCastelsarrasin.