Oyem weather in December

In December, Oyem sees average daytime highs of 29°C and overnight lows near 20°C, with 116 mm of rain across 20.4 wet days and about 11.9 hours of daylight. It is the 6th-warmest and 10th-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 2% of the time in December, and the air most often feels muggy.

Daylight stretches from about 11 h 54 min at the start of December to 11 h 54 min by month's end. Set against the rest of the year, December is Oyem's 2nd-clearest and 7th-windiest month. For the whole year in context, see Oyem's year-round climate.

Daytime high
29°
6th warmest
Overnight low
20°
6th coldest
Rainfall
116 mm
20.4 wet days
Daylight
11 h 54 min
6:13 AM – 6:07 PM
Cloud cover
77%
2nd clearest
Wind
5 km/h
7th windiest
Solar energy
4.34 kWh/m²
Travel score
4.1
out of 10

Oyem is city in Gabon.

Founded
1904

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

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 Oyem reaches about 29°C in the afternoon and slips back to 20°C overnight — a 9°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 on par with November and on par with January.

15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
12820
22820
32820
42820
52820
62920
72920
82920
92920
102920
112920
122920
132920
142920
152920
162920
172920
182920
192920
202920
212920
222920
232920
242920
252920
262920
272920
282920
292920
302920
312920

How December really feels in Oyem

Once humidity and wind are folded in, December 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

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

Oyem weather by month

How December compares with the rest of the year at a glance. December is the 6th-warmest and 10th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan29° / 20°8516.411.94.3
Feb30° / 20°11217.111.93.9
Mar30° / 20°20025.5123.2
Apr30° / 21°22626.4123.0
May29° / 21°18526.912.13.3
Jun28° / 20°14322.712.14.2
Jul27° / 20°11920.412.14.7
Aug27° / 20°11720.612.14.6
Sep28° / 20°22327.2123.6
Oct28° / 20°26129.1123.4
Nov28° / 20°23227.311.93.4
Dec29° / 20°11620.411.94.1

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 2% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 17% of December, with mostly cloudy or overcast conditions the remaining 80%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
11585
21585
31684
41684
51783
61783
71882
81882
91981
102080
112080
122080
132080
142080
152080
162080
172080
182080
192179
202179
212179
222179
232179
242179
252179
262179
272179
282278
292377
302377
312377

Chance of precipitation in December

Any precipitation

Oyem gets around 116 mm of rain over 20.4 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 66% and peaks near 80% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
180
279
378
477
576
675
774
873
972
1070
1169
1268
1367
1466
1565
1664
1763
1863
1962
2061
2161
2260
2360
2459
2559
2658
2758
2857
2956
3056
3155

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, December lands in the muggy band about 83% of days. Sticky, muggy-or-worse air turns up on roughly 99% of them.

0%25%50%75%100%151015202531
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1007723
2007822
3007921
4008020
5008119
6008119
7008218
8008317
9018217
10018217
11018316
12018316
13018316
14018316
15028216
16028216
17028315
18028315
19028315
20028315
21028414
22028414
23028513
24028513
25028612
26028612
27028612
28028711
29028711
30028711
31138511

Wind in December

Winds average 5 km/h in December.

Across December, daily wind ranges from about 5 km/h on the calmest days to 6 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
15calm
25calm
35calm
45calm
55calm
65calm
75calm
85calm
95calm
105calm
115calm
125calm
135calm
145calm
155calm
165calm
175calm
185calm
195calm
205calm
215calm
225calm
235calm
245calm
255calm
266calm
276calm
286calm
296calm
306calm
316calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 11 h 54 min at the start of December to 11 h 54 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 6:06 AM to 6:20 AM, and sunset from 6:01 PM to 6:14 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.96:066:01
211.96:066:01
311.96:076:02
411.96:076:02
511.96:086:02
611.96:086:03
711.96:096:03
811.96:096:04
911.96:096:04
1011.96:106:04
1111.96:106:05
1211.96:116:05
1311.96:116:06
1411.96:126:06
1511.96:126:07
1611.96:136:07
1711.96:136:08
1811.96:146:08
1911.96:146:08
2011.96:146:09
2111.96:156:09
2211.96:156:10
2311.96:166:10
2411.96:166:11
2511.96:176:11
2611.96:176:12
2711.96:186:12
2811.96:186:13
2911.96:196:13
3011.96:196:14
3111.96:206:14

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 4.34 kWh/m².

For context, solar energy here swings from a low near 3.94 kWh/m² to a high of 5 kWh/m² in March across the year — December's 4.34 kWh/m² falls in the middle.

012345151015202531
Solar energy (kWh/m²)Level
14.3Bright
24.3Bright
34.3Bright
44.3Bright
54.3Bright
64.3Bright
74.3Bright
84.3Bright
94.3Bright
104.3Bright
114.3Bright
124.3Bright
134.3Bright
144.3Bright
154.3Bright
164.3Bright
174.3Bright
184.4Bright
194.4Bright
204.4Bright
214.4Bright
224.4Bright
234.4Bright
244.4Bright
254.4Bright
264.4Bright
274.4Bright
284.4Bright
294.4Bright
304.4Bright
314.4Bright
Planning a trip in December

Is December a good time to visit Oyem?

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

4.1
Sightseeing
5th-best month of the year
5.1
Beach & pool
3rd-best month of the year

December is a reasonable time to visit Oyem for sightseeing.

What to pack for Oyem in December

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

In December, Oyem sees daytime highs around 29°C and nights near 20°C. Pack light clothes and rain gear. About 20 days see rain.

light clothesrain gear

UV index in Oyem in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 9 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Oyem peaks around March 21 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 16 at about 9 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeExtremeVery highMar 21UV 14Dec 16UV 9
UV index (midday)Level
Jan11Extreme
Feb12Extreme
Mar14Extreme
Apr13Extreme
May12Extreme
Jun10Very high
Jul10Extreme
Aug11Extreme
Sep13Extreme
Oct14Extreme
Nov11Extreme
Dec9Very high

Air quality in Oyem 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 Oyem is worst in February — around 48 µg/m³ PM2.5 (poor), about 5.3× the cleanest month (October, 9 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecPoorModerateGoodModerateFeb 1346 µg/m³Oct 109 µg/m³
PM2.5 (µg/m³)Level
Jan37Poor
Feb48Poor
Mar29Moderate
Apr20Moderate
May15Moderate
Jun19Moderate
Jul20Moderate
Aug16Moderate
Sep9Good
Oct9Good
Nov15Moderate
Dec30Moderate
Location & terrain

Where is Oyem?

Oyem sits at 1.6°N, 11.6°E, 656 m above sea level, in Gabon. The nearest listed city is Bitam, 54 km away.

BitamEbebiyinCiudad de la PazAmbamMakokouBata

Topography around Oyem

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

Within 3 km, the terrain around Oyem has only modest variations in elevation — a maximum elevation change of 103 m around an average of 654 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 569 m.

The land around Oyem is covered by trees (63%) and artificial surfaces (23%) within 3 km, trees (97%) within 16 km, and trees (100%) within 80 km.

3 km
103 m
16 km
244 m
80 km
569 m
treesgrasslandartificial surfaces
December weather nearby: Bitam 54 km · Ebebiyin 67 km · Ciudad de la Paz 84 km · Ambam 93 km · Ébolowa 152 km · Sangmélima 155 km · Makokou 183 km · Bata 204 km

Gabon travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type C / E
220 V · 50 Hz
Prices
≈ 37% of US
price level, 2025
GDP per capita
$8,263
2025
Happiness
5.2 / 10
World Happiness, 2025
Road deaths
23.9
per 100k/yr, 2019
Income group
Upper middle
World Bank
Religion
Protestant 46%Roman Catholic 30%Muslim 11%none 7%

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 Oyem (1.5995°, 11.5793°, elevation 656 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. 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).