Matoury weather in December

In December, Matoury sees average daytime highs of 29°C and overnight lows near 24°C, with 274 mm of rain across 27.4 wet days and about 11.7 hours of daylight. It is the 6th-warmest and 3rd-wettest month of the year here.

Day-to-day highs hold fairly steady near 29°C through the month. The sky is clear or mostly clear about 9% of the time in December, and the air most often feels oppressive.

Daylight stretches from about 11 h 42 min at the start of December to 11 h 42 min by month's end. Set against the rest of the year, December is Matoury's 6th-clearest and 5th-windiest month. For the whole year in context, see Matoury's year-round climate.

Daytime high
29°
6th warmest
Overnight low
24°
8th coldest
Rainfall
274 mm
27.4 wet days
Daylight
11 h 42 min
6:34 AM – 6:17 PM
Cloud cover
73%
6th clearest
Wind
11 km/h
5th windiest
Solar energy
4.33 kWh/m²
Travel score
3.3
out of 10

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 29°C through the month.

A typical December day in Matoury reaches about 29°C in the afternoon and slips back to 24°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 30°C. Set against its neighbours, December runs about 1°C cooler than November and on par with January.

20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13024
22924
32924
42924
52924
62924
72924
82924
92924
102924
112924
122924
132924
142924
152924
162924
172924
182924
192924
202924
212924
222924
232924
242824
252824
262824
272824
282824
292824
302824
312824

How December really feels in Matoury

Once humidity and wind are folded in, December averages 20 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
20
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

The story in December is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Matoury weather by month

How December compares with the rest of the year at a glance. December is the 6th-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan28° / 24°25926.511.83.7
Feb28° / 24°21722.211.84.0
Mar29° / 24°17522.9123.9
Apr29° / 24°26424.812.13.5
May29° / 24°40829.212.23.1
Jun29° / 23°35428.412.33.1
Jul30° / 23°24026.612.33.4
Aug30° / 23°12619.912.23.9
Sep31° / 23°6213124.3
Oct31° / 24°7214.511.94.2
Nov30° / 24°15421.111.83.6
Dec29° / 24°27427.411.73.3

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 9% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 18% of December, with mostly cloudy or overcast conditions the remaining 73%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13367
23367
33169
43070
53070
62971
72971
82971
92971
102872
112773
122773
132674
142674
152674
162674
172674
182674
192674
202476
212575
222575
232575
242476
252476
262476
272476
282476
292476
302476
312476

Chance of precipitation in December

Any precipitation

Matoury gets around 274 mm of rain over 27.4 wet days in December. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 88% and peaks near 91% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%100%151015202531
Rain chance (%)
181
282
383
484
584
685
785
886
986
1087
1188
1288
1389
1489
1590
1690
1790
1890
1990
2090
2191
2291
2391
2491
2591
2691
2791
2891
2990
3090
3190

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, December lands in the oppressive band about 82% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Muggy (%)Oppressive (%)Miserable (%)
107327
207327
307426
407426
507426
607525
707624
807624
907723
1007822
1117821
1217920
1317920
1418019
1518118
1618217
1718316
1818415
1918514
2018613
2118712
2218712
2318811
2418910
2509010
260919
270919
280919
290928
300928
310937

Wind in December

Winds average 11 km/h in December.

Across December, daily wind ranges from about 10 km/h on the calmest days to 11 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
110calm
210calm
310calm
410calm
510calm
610calm
710calm
810calm
910calm
1010calm
1111calm
1211calm
1311calm
1411calm
1511calm
1611calm
1711calm
1811calm
1911calm
2011calm
2111calm
2211calm
2311calm
2411calm
2511calm
2611calm
2711calm
2811calm
2911calm
3011calm
3111calm

Sunrise & sunset in December

DaylightNight

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

Days grow by about 0 minutes over December. Sunrise moves from 6:27 AM to 6:41 AM, and sunset from 6:11 PM to 6:24 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.76:276:11
211.76:276:12
311.76:286:12
411.76:286:12
511.76:296:13
611.76:296:13
711.76:306:13
811.76:306:14
911.76:316:14
1011.76:316:15
1111.76:316:15
1211.76:326:15
1311.76:326:16
1411.76:336:16
1511.76:336:17
1611.76:346:17
1711.76:346:18
1811.76:356:18
1911.76:356:18
2011.76:366:19
2111.76:366:19
2211.76:376:20
2311.76:376:20
2411.76:386:21
2511.76:386:21
2611.76:396:22
2711.76:396:22
2811.76:396:23
2911.76:406:23
3011.76:406:24
3111.76:416:24

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 4.33 kWh/m².

For context, solar energy here swings from a low near 4.16 kWh/m² to a high of 6.07 kWh/m² in September across the year — December's 4.33 kWh/m² falls in the middle.

024151015202531
Solar energy (kWh/m²)Level
14.7Bright
24.7Bright
34.7Bright
44.6Bright
54.6Bright
64.6Bright
74.5Bright
84.5Bright
94.5Bright
104.5Bright
114.4Bright
124.4Bright
134.4Bright
144.3Bright
154.3Bright
164.3Bright
174.3Bright
184.3Bright
194.2Bright
204.2Bright
214.2Bright
224.2Bright
234.2Bright
244.2Bright
254.2Bright
264.1Bright
274.1Bright
284.1Bright
294.1Bright
304.1Bright
314.1Bright
Planning a trip in December

Is December a good time to visit Matoury?

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

3.3
Sightseeing
10th-best month of the year
4.2
Beach & pool
10th-best month of the year

December is a weaker month for outdoor sightseeing in Matoury.

What to pack for Matoury in December

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

In December, Matoury sees daytime highs around 29°C and nights near 24°C. Pack light clothes and rain gear. About 27 days see rain.

light clothesrain gear

Sea temperature near Matoury in December

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

The sea at the nearest coast (about 22 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
Apr28Warm
May28Warm
Jun28Tropical
Jul28Tropical
Aug28Tropical
Sep28Tropical
Oct28Tropical
Nov28Warm
Dec27Warm

UV index in Matoury in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 10 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Matoury 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 Matoury in December

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Matoury is worst in February — around 26 µg/m³ PM2.5 (moderate), about 3.6× the cleanest month (August, 7 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateFeb 1925 µg/m³Aug 137 µg/m³
PM2.5 (µg/m³)Level
Jan23Moderate
Feb26Moderate
Mar25Moderate
Apr24Moderate
May17Moderate
Jun10Good
Jul7Good
Aug7Good
Sep8Good
Oct10Good
Nov11Good
Dec18Moderate
Location & terrain

Where is Matoury?

Matoury sits at 4.8°N, 52.3°W, 13 m above sea level, in French Guiana. The nearest listed city is Rémire-Montjoly, 10 km away.

KourouOiapoqueSaint-Laurent-du-Maroni

Topography around Matoury

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

Within 3 km, the terrain around Matoury has only modest variations in elevation — a maximum elevation change of 171 m around an average of 17 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 244 m; within 80 km, significant variations in elevation — a maximum elevation change of 487 m.

The land around Matoury is covered by trees (79%) within 3 km, trees (54%) and water (26%) within 16 km, and trees (56%) and water (38%) within 80 km.

3 km
171 m
16 km
244 m
80 km
487 m
treesgrasslandartificial surfacesbare terrainwaterwetlandmangroves
December weather nearby: Rémire-Montjoly 10 km · Cayenne 10 km · Kourou 50 km · Oiapoque 124 km · Saint-Laurent-du-Maroni 202 km · Blauwgrond 329 km · Rainville 330 km · Beekhuizen 333 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 Matoury (4.8492°, -52.3235°, elevation 13 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).