Cayenne weather in January

In January, Cayenne sees average daytime highs of 27°C and overnight lows near 25°C, with 244 mm of rain across 26.6 wet days and about 11.7 hours of daylight. It is the 11th-warmest and 5th-wettest month of the year here.

Day-to-day highs hold fairly steady near 27°C through the month. The sky is clear or mostly clear about 10% of the time in January, and the air most often feels oppressive.

Daylight stretches from about 11 h 42 min at the start of January to 11 h 48 min by month's end. Set against the rest of the year, January is Cayenne's 8th-clearest and 3rd-windiest month. For the whole year in context, see Cayenne's year-round climate.

Daytime high
27°
11th warmest
Overnight low
25°
3rd coldest
Rainfall
244 mm
26.6 wet days
Daylight
11 h 42 min
6:46 AM – 6:31 PM
Cloud cover
71%
8th clearest
Wind
18 km/h
3rd windiest
Solar energy
4.48 kWh/m²
Travel score
4.0
out of 10

Cayenne is commune and capital city of French Guiana.

Density
2,608/km²
people per km²
Founded
1664

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in January

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 27°C through the month.

A typical January day in Cayenne reaches about 27°C in the afternoon and slips back to 25°C overnight — a 3°C spread between the day's warmth and the night's chill. On most days the high lands between 26°C and 28°C. Set against its neighbours, January runs on par with December and on par with February.

20°23°25°28°30°151015202531
Avg high (°C)Avg low (°C)
12825
22725
32725
42725
52725
62725
72725
82725
92725
102725
112725
122725
132725
142725
152725
162725
172725
182725
192725
202725
212725
222725
232725
242725
252725
262725
272725
282725
292725
302725
312725

How January really feels in Cayenne

Once humidity and wind are folded in, January averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
0
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

January sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Cayenne weather by month

How January compares with the rest of the year at a glance. January is the 11th-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan27° / 25°24426.611.74.0
Feb27° / 25°20522.311.84.2
Mar28° / 25°17323.9124.3
Apr28° / 25°2582512.14.0
May28° / 25°41129.112.23.5
Jun28° / 25°34428.512.33.5
Jul29° / 25°18624.812.34.0
Aug30° / 25°6713.912.25.0
Sep30° / 25°237.2125.5
Oct30° / 25°4010.111.95.1
Nov29° / 25°12219.611.84.2
Dec28° / 25°25326.511.73.8

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 10% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 22% of January, with mostly cloudy or overcast conditions the remaining 67%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13268
23268
33268
43268
53268
63268
73169
83169
93268
103268
113268
123268
133367
143367
153367
163367
173367
183367
193367
203367
213268
223268
233268
243268
253268
263367
273367
283367
293367
303466
313466

Chance of precipitation in January

Any precipitation

Cayenne gets around 244 mm of rain over 26.6 wet days in January. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 85% and peaks near 88% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%100%151015202531
Rain chance (%)
188
288
388
488
588
688
788
888
987
1087
1187
1287
1386
1486
1585
1685
1784
1884
1984
2084
2183
2283
2383
2483
2583
2683
2782
2882
2982
3082
3182

Humidity in January

DryComfortableHumidMuggyOppressiveMiserable

Most of January feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, January lands in the oppressive band about 95% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Muggy (%)Oppressive (%)Miserable (%)
11936
21945
31945
41945
51954
61954
71954
81954
91954
101954
111954
121954
132944
142953
152953
162953
172953
183943
193943
203943
213943
223943
233943
243943
253943
263943
273943
283943
293934
304924
314924

Wind in January

Winds average 18 km/h in January.

Across January, daily wind ranges from about 17 km/h on the calmest days to 19 km/h at its breeziest. It stays fairly steady from day to day.

0510152025151015202531
Wind speed (km/h)Feels
117light breeze
217light breeze
317light breeze
417light breeze
517light breeze
617light breeze
718light breeze
818light breeze
918light breeze
1018light breeze
1118light breeze
1218light breeze
1318light breeze
1418light breeze
1518light breeze
1618light breeze
1718light breeze
1818light breeze
1918light breeze
2018light breeze
2118light breeze
2218light breeze
2318light breeze
2418light breeze
2518light breeze
2618light breeze
2719light breeze
2819light breeze
2919light breeze
3019light breeze
3119light breeze

Sunrise & sunset in January

DaylightNight

Daylight runs from about 11 h 42 min at the start of January to 11 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 6 minutes over January. Sunrise moves from 6:41 AM to 6:49 AM, and sunset from 6:24 PM to 6:36 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.76:416:24
211.76:416:25
311.76:426:25
411.76:426:25
511.76:436:26
611.76:436:26
711.76:436:27
811.76:446:27
911.76:446:28
1011.76:446:28
1111.76:456:29
1211.76:456:29
1311.76:456:30
1411.76:466:30
1511.76:466:30
1611.76:466:31
1711.76:476:31
1811.76:476:32
1911.76:476:32
2011.86:476:33
2111.86:486:33
2211.86:486:33
2311.86:486:34
2411.86:486:34
2511.86:486:34
2611.86:496:35
2711.86:496:35
2811.86:496:35
2911.86:496:36
3011.86:496:36
3111.86:496:36

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 4.48 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 4.48 kWh/m² to a high of 6.26 kWh/m² in September across the year — January's 4.48 kWh/m² sits near the bottom.

024151015202531
Solar energy (kWh/m²)Level
14.4Bright
24.4Bright
34.4Bright
44.4Bright
54.4Bright
64.4Bright
74.4Bright
84.5Bright
94.5Bright
104.5Bright
114.5Bright
124.5Bright
134.5Bright
144.5Bright
154.5Bright
164.5Bright
174.5Bright
184.5Bright
194.5Bright
204.5Bright
214.5Bright
224.5Bright
234.5Bright
244.5Bright
254.5Bright
264.5Bright
274.5Bright
284.5Bright
294.6Bright
304.6Bright
314.6Bright
Planning a trip in January

Hazard calendar for Cayenne

In seasonPeak

In January, Cayenne sits inside its rainy season season. The full year is below, with each hazard's peak months called out.

Cayenne's rainy season runs April–July, when most of the year's rain falls.

Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is January a good time to visit Cayenne?

Our two travel scores rate January for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

4.0
Sightseeing
7th-best month of the year
4.2
Beach & pool
10th-best month of the year

January is a reasonable time to visit Cayenne for sightseeing.

What to pack for Cayenne in January

From January's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In January, Cayenne sees daytime highs around 27°C and nights near 25°C. Pack light clothes and rain gear. About 27 days see rain.

light clothesrain gear

Sea temperature near Cayenne in January

The nearest coast averages about 27°C in January — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 21 km away) is warmest in July at about 28°C and coldest in January near 27°C.

The water stays above 20°C all year — warm enough for a swim any month.

26°28°30°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan27Warm
Feb27Warm
Mar27Warm
Apr27Warm
May28Warm
Jun28Warm
Jul28Tropical
Aug28Tropical
Sep28Warm
Oct28Tropical
Nov28Warm
Dec27Warm

UV index in Cayenne in January

LowModerateHighVery highExtreme

Clear-sky midday UV in January peaks around 13 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Cayenne peaks around April 12 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 11 at about 10 (extreme).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeApr 12UV 14Dec 11UV 10
UV index (midday)Level
Jan13Extreme
Feb13Extreme
Mar14Extreme
Apr14Extreme
May13Extreme
Jun11Extreme
Jul11Extreme
Aug11Extreme
Sep12Extreme
Oct12Extreme
Nov11Extreme
Dec10Extreme

Air quality in Cayenne in January

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where January falls, not just the annual average.

Air quality in Cayenne is worst in February — around 28 µg/m³ PM2.5 (moderate), about 4.0× the cleanest month (August, 7 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateFeb 1627 µg/m³Aug 157 µg/m³
PM2.5 (µg/m³)Level
Jan26Moderate
Feb28Moderate
Mar26Moderate
Apr26Moderate
May21Moderate
Jun12Moderate
Jul8Good
Aug7Good
Sep8Good
Oct10Good
Nov12Good
Dec21Moderate
Location & terrain

Where is Cayenne?

Cayenne sits at 4.9°N, 52.3°W, 7 m above sea level, in French Guiana. The nearest listed city is Rémire-Montjoly, 8.0 km away.

KourouOiapoqueSaint-Laurent-du-Maroni

Topography around Cayenne

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Cayenne.

Within 3 km, the terrain around Cayenne has only modest variations in elevation — a maximum elevation change of 84 m around an average of 4 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 250 m; within 80 km, significant variations in elevation — a maximum elevation change of 487 m.

The land around Cayenne is covered by water (58%) and artificial surfaces (20%) within 3 km, water (55%) and trees (30%) within 16 km, and trees (53%) and water (41%) within 80 km.

3 km
84 m
16 km
250 m
80 km
487 m
treesgrasslandartificial surfaceswaterwetlandmangroves
January weather nearby: Rémire-Montjoly 8.0 km · Matoury 10 km · Kourou 42 km · Oiapoque 134 km · Saint-Laurent-du-Maroni 198 km · Blauwgrond 324 km · Rainville 326 km · Beekhuizen 329 km

French Guiana travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type C / E
220 V · 50 Hz

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Cayenne (4.9381°, -52.3346°, elevation 7 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).