French Guiana · 1991–2020

Best time to visit
Matoury.

September leads for comfortable weather in Matoury: typically 32.5°C by day, 22.4°C at night, with 59 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high32.5°C

Typical low22.4°C

Rain in September59 mm

Comfort

September

September · October · November

52climate match

Beach

October

October · September · November

78climate match

Outdoors

October

October · September · November

32climate match

The weakest month is January, scoring 5 against September’s 52 — 380 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

529.6° / 23.3°

Feb

829.5° / 23.5°

Mar

1330° / 23.7°

Apr

530.3° / 23.7°

May

530.4° / 23.6°

Jun

530.8° / 23°

Jul

1631.3° / 22.5°

Aug

3532° / 22.5°

Sep

5232.5° / 22.4°

Oct

5232.7° / 22.4°

Nov

3831.9° / 22.6°

Dec

630.6° / 23.2°

Monthly climate evidence for Matoury — daylight is calculated from latitude, everything else is measured, sea temperature from the nearest open water 22 km away
Month	Day	Night	Rain	Wet days	Sea	Daylight	Comfort	Coverage
January	29.6°C	23.3°C	380 mm	22.5	27.0°C	11 h 52	5	Strong coverage
February	29.5°C	23.5°C	339 mm	20.8	27.0°C	11 h 58	8	Strong coverage
March	30°C	23.7°C	295 mm	20.3	27.2°C	12 h 05	13	Strong coverage
April	30.3°C	23.7°C	441 mm	22.6	27.5°C	12 h 13	5	Strong coverage
May	30.4°C	23.6°C	549 mm	25.5	27.7°C	12 h 20	5	Strong coverage
June	30.8°C	23°C	376 mm	24.7	28.0°C	12 h 24	5	Strong coverage
July	31.3°C	22.5°C	252 mm	20.9	28.2°C	12 h 23	16	Strong coverage
August	32°C	22.5°C	139 mm	14.6	28.2°C	12 h 16	35	Strong coverage
September	32.5°C	22.4°C	59 mm	6.9	28.0°C	12 h 08	52	Strong coverage
October	32.7°C	22.4°C	56 mm	6.6	28.1°C	12 h 00	52	Strong coverage
November	31.9°C	22.6°C	135 mm	12.7	27.9°C	11 h 54	38	Strong coverage
December	30.6°C	23.2°C	332 mm	21.1	27.4°C	11 h 51	6	Strong coverage

Records at ROCHAMBEAU, 1950–2024
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	35.3°C7 Jan 2005	17.4°C23 Jan 1964	171 mm31 Jan 1968	908 mm1997 · driest 19 mm in 2002	75
February	32.3°C12 Feb 1998	18.9°C11 Feb 1976	182 mm27 Feb 1957	924 mm1953 · driest 9 mm in 2002	75
March	34.2°C25 Mar 2005	18.5°C9 Mar 1978	203 mm20 Mar 1970	885 mm1956 · driest 36 mm in 2019	75
April	33.0°C22 Apr 2010	19.0°C11 Apr 1965	190 mm14 Apr 2000	926 mm1990 · driest 24 mm in 2002	75
May	33.8°C16 May 2024	18.8°C30 May 1968	164 mm8 May 1955	1018 mm1984 · driest 33 mm in 2002	75
June	34.4°C30 Jun 2024	18.9°C26 Jun 1954	166 mm30 Jun 1975	802 mm1975 · driest 122 mm in 2002	75
July	33.9°C29 Jul 2020	19.2°C27 Jul 1956	135 mm9 Jul 1960	465 mm2008 · driest 62 mm in 2002	75
August	34.5°C19 Aug 2024	19.3°C5 Aug 1959	92 mm2 Aug 1988	333 mm1954 · driest 20 mm in 2003	75
September	35.2°C12 Sep 2017	18.7°C6 Sep 1967	94 mm17 Sep 2020	214 mm1975 · driest 4 mm in 1997	75
October	36.2°C7 Oct 2023	18.6°C11 Oct 1976	55 mm29 Oct 1953	300 mm1973 · driest 3 mm in 1976	75
November	34.6°C1 Nov 1951	17.2°C9 Nov 1958	109 mm22 Nov 1994	447 mm1968 · driest 13 mm in 1958	75
December	34.1°C4 Dec 2004	17.7°C29 Dec 2006	130 mm30 Dec 1983	665 mm2021 · driest 76 mm in 2004	75

Typical days per month at ROCHAMBEAU, 1991–2020
Month	Days 25°C+	Days 30°C+	Heavy rain (10 mm+)
January	24	10	10
February	22	8	9
March	25	14	7
April	24	17	10
May	24	16	14
June	23	18	12
July	24	22	8
August	24	24	4
September	24	24	2
October	25	25	2
November	24	23	4
December	25	18	9

How often, not how much — every day in ROCHAMBEAU’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	22%	77%	37%	95%	28.3–30.1°C
February	26%	75%	33%	94%	28.3–30.0°C
March	29%	70%	29%	90%	28.6–30.6°C
April	25%	75%	38%	95%	28.9–30.7°C
May	14%	86%	52%	99%	28.8–30.8°C
June	14%	86%	45%	100%	29.1–31.4°C
July	30%	70%	30%	93%	29.8–31.8°C
August	50%	50%	17%	66%	30.6–32.6°C
September	74%	26%	6%	29%	31.1–33.1°C
October	75%	25%	7%	30%	31.3–33.2°C
November	55%	45%	16%	65%	30.4–32.4°C
December	27%	73%	34%	92%	29.3–31.3°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.

1950Each stripe is one year’s mean temperature against the 59-year average. Warmest: 2005. Coolest: 1974.2011

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 3380965
NOAA station: FG000081405 · ROCHAMBEAU
Station distance: 5.1 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 25 usable years
Daylight: Calculated from latitude 4.85°, mid-month, sunrise to sunset including refraction. Not a station measurement.
Sea temperature: NOAA OISST v2.1 1991–2020 monthly climatology, nearest open water 22 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 ROCHAMBEAU is what differs

Cayenne→Kourou→Rémire-Montjoly→Macouria→Sinnamary→Résidence Cogneau-Larivot→

Or put two places side by side: Matoury vs Cayenne

Best time to visitMatoury.

September

October

October

The whole year,without the guesswork.

Nearby, measured,and named.

Best time to visit
Matoury.

The whole year,
without the guesswork.

Nearby, measured,
and named.