Sunyani weather in December

In December, Sunyani sees average daytime highs of 32°C and overnight lows near 22°C, with 18 mm of rain across 3.4 wet days and about 11.6 hours of daylight. It is the 5th-warmest and 11th-wettest month of the year here.

Day-to-day highs hold fairly steady near 32°C through the month. The sky is clear or mostly clear about 54% of the time in December, and the air most often feels oppressive.

Daylight stretches from about 11 h 36 min at the start of December to 11 h 36 min by month's end. Set against the rest of the year, December is Sunyani's 2nd-clearest and 12th-windiest month. For the whole year in context, see Sunyani's year-round climate.

Daytime high
32°
5th warmest
Overnight low
22°
1st coldest
Rainfall
18 mm
3.4 wet days
Daylight
11 h 36 min
6:18 AM – 5:53 PM
Cloud cover
41%
2nd clearest
Wind
6 km/h
12th windiest
Solar energy
5.14 kWh/m²
Travel score
4.8
out of 10

Sunyani is Capital of Bono Region in Ghana.

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 32°C through the month.

A typical December day in Sunyani reaches about 32°C in the afternoon and slips back to 22°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 30°C and 34°C. Set against its neighbours, December runs about 1°C warmer than November and about 1°C cooler than January.

15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13122
23222
33222
43222
53222
63222
73222
83222
93222
103222
113222
123222
133222
143222
153222
163222
173222
183222
193222
203222
213222
223222
233222
243222
253221
263221
273221
283221
293321
303321
313321

How December really feels in Sunyani

Once humidity and wind are folded in, December averages 31 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
31
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.

Sunyani weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan33° / 22°15311.64.0
Feb35° / 24°35611.82.9
Mar34° / 24°8614.7122.6
Apr33° / 24°10016.512.22.8
May32° / 24°9818.312.33.2
Jun30° / 23°10219.212.43.7
Jul29° / 22°8316.412.44.5
Aug28° / 22°911712.24.5
Sep29° / 23°13222123.7
Oct30° / 22°11621.211.83.6
Nov31° / 22°5710.911.74.3
Dec32° / 22°183.411.64.8

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 54% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 22% of December, with mostly cloudy or overcast conditions the remaining 25%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16139
26337
36337
46535
56733
66733
76931
87030
97129
107228
117327
127426
137525
147624
157822
167822
177921
187921
198119
208119
218119
228218
238218
248218
258218
268218
278218
288119
298119
308119
318020

Chance of precipitation in December

Any precipitation

Sunyani gets around 18 mm of rain over 3.4 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 11% and peaks near 21% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%151015202531
Rain chance (%)
121
220
319
419
518
617
716
816
915
1014
1114
1213
1313
1412
1511
1611
1710
1810
199
208
218
227
237
246
256
266
276
286
296
306
316

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 48% of days. Sticky, muggy-or-worse air turns up on roughly 74% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
11331776
22331874
32441971
42442169
52542267
63552364
73552463
83652561
94662559
104662658
115662657
125672755
136772753
146782752
157782751
168782749
178892848
189892846
19108102844
20118102942
21128112940
22148112938
23159112936
24169122934
25189122932
262010122930
272210122828
282310132826
292510132824
302710132723
312810132721

Wind in December

Winds average 6 km/h in December, the calmest month.

Across December, daily wind ranges from about 6 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
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm
316calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 11 h 36 min at the start of December to 11 h 36 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 6:11 AM to 6:25 AM, and sunset from 5:47 PM to 6:00 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.66:115:47
211.66:115:47
311.66:125:48
411.66:125:48
511.66:135:48
611.66:135:49
711.66:145:49
811.66:145:49
911.66:155:50
1011.66:155:50
1111.66:165:51
1211.66:165:51
1311.66:175:51
1411.66:175:52
1511.66:185:52
1611.66:185:53
1711.66:195:53
1811.66:195:54
1911.66:205:54
2011.66:205:55
2111.66:215:55
2211.66:215:55
2311.66:225:56
2411.66:225:56
2511.66:225:57
2611.66:235:57
2711.66:235:58
2811.66:245:58
2911.66:245:59
3011.66:255:59
3111.66:256:00

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 5.14 kWh/m².

For context, solar energy here swings from a low near 3.74 kWh/m² to a high of 5.63 kWh/m² in February across the year — December's 5.14 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
14.8Bright
24.8Bright
34.9Bright
44.9Bright
54.9Bright
64.9Bright
74.9Bright
85.0Bright
95.0Bright
105.0Bright
115.0Bright
125.0Bright
135.1Bright
145.1Bright
155.1Bright
165.1Bright
175.2Bright
185.2Bright
195.2Bright
205.2Bright
215.3Bright
225.3Bright
235.3Bright
245.3Bright
255.3Bright
265.4Bright
275.4Bright
285.4Bright
295.5Bright
305.5Bright
315.5Bright
Planning a trip in December

Hazard calendar for Sunyani

In seasonPeak

None of Sunyani's seasonal hazards are active in December. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Sunyani sees seasonal dust haze (January–April), heaviest in February.

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

Is December a good time to visit Sunyani?

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

4.8
Sightseeing
1st-best month of the year
7.6
Beach & pool
1st-best month of the year

December is a reasonable time to visit Sunyani for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Sunyani in December

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

In December, Sunyani sees daytime highs around 32°C and nights near 22°C. Pack light clothes. Worth having: sun protection. About 3 days see rain.

light clothessun protection

UV index in Sunyani 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 Sunyani peaks around April 13 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near January 10 at about 9 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecVery highExtremeVery highApr 13UV 13Jan 10UV 9
UV index (midday)Level
Jan9Very high
Feb12Extreme
Mar12Extreme
Apr13Extreme
May11Extreme
Jun11Extreme
Jul10Extreme
Aug12Extreme
Sep13Extreme
Oct12Extreme
Nov10Very high
Dec9Very high

Air quality in Sunyani 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 Sunyani is worst in February — around 103 µg/m³ PM2.5 (unhealthy), about 6.0× the cleanest month (August, 17 µg/m³).

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

0306090120JanFebMarAprMayJunJulAugSepOctNovDecUnhealthyPoorModerateUnhealthyFeb 9101 µg/m³Aug 1617 µg/m³
PM2.5 (µg/m³)Level
Jan97Unhealthy
Feb103Unhealthy
Mar45Poor
Apr39Poor
May23Moderate
Jun19Moderate
Jul18Moderate
Aug17Moderate
Sep18Moderate
Oct25Moderate
Nov34Moderate
Dec82Unhealthy
Location & terrain

Where is Sunyani?

Sunyani sits at 7.3°N, 2.3°W, 298 m above sea level, in Ghana. The nearest listed city is Nsoatre, 17 km away.

TepaBechemWankyiTechiman

Topography around Sunyani

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

Within 3 km, the terrain around Sunyani has only modest variations in elevation — a maximum elevation change of 93 m around an average of 294 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 221 m; within 80 km, large variations in elevation — a maximum elevation change of 738 m.

The land around Sunyani is covered by artificial surfaces (65%) within 3 km, trees (49%) and grassland (30%) within 16 km, and trees (71%) within 80 km.

3 km
93 m
16 km
221 m
80 km
738 m
treesshrubsgrasslandartificial surfaces
December weather nearby: Nsoatre 17 km · Atronie 22 km · Berekum 31 km · Duayaw-Nkwanta 31 km · Tepa 41 km · Bechem 43 km · Wankyi 51 km · Techiman 51 km

Ghana travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type D / G
230 V · 50 Hz
Prices
≈ 38% of US
price level, 2025
GDP per capita
$3,257
2025
Happiness
4.6 / 10
World Happiness, 2025
Safe drinking water
43%
of population, 2024
Homicide rate
1.8
per 100k, 2022
Road deaths
25.7
per 100k/yr, 2019
Income group
Lower middle
World Bank
English
Moderate
EF EPI 540
Religion
Christian 71%Muslim 20%other 5%traditionalist 3%

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 Sunyani (7.3399°, -2.3268°, elevation 298 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).