Climate averages 1991–2020
Sunyani weather
in December.
A hot, fairly dry month: the 5th warmest and the 2nd driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a hot month in Sunyani: daytime highs average 31.9°C and nights cool to about 21.8°C. By daytime temperature it is the 5th warmest of the 12 months.
Expect about 18 mm of rain on roughly 3 days, which makes December a fairly dry month (the 2nd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 42 min on an average December day.
The nearest other city in this atlas is Berekum (31 km away). In December its highs average 32.1°C, about as warm as Sunyani, with 13 mm of rain.
Among the 26 cities listed in Ghana, Sunyani ranks 10th of 26 for the warmest December highs and 9th of 26 for the driest December (rainfall, lowest first). The mean December high of those 26 cities is 31.7°C; Sunyani is 0.2°C warmer than that mean.
From December to January, average highs rise by 1.7°C to 33.5°C, and monthly rainfall falls from 18 mm to 15 mm.
The annual picture
December in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Sunyani climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 33.5°C21.9°C | 21.9°C | 15 | 3.0 | 11.712 h |
| February | 34.4°C23.4°C | 23.4°C | 36 | 6.1 | 11.912 h |
| March | 33.3°C23.9°C | 23.9°C | 86 | 14.6 | 12.112 h |
| April | 32.2°C23.8°C | 23.8°C | 100 | 16.4 | 12.312 h |
| May | 31.1°C23.5°C | 23.5°C | 98 | 18.3 | 12.512 h |
| June | 29.2°C22.5°C | 22.5°C | 102 | 19.1 | 12.513 h |
| July | 28.0°C21.8°C | 21.8°C | 83 | 16.4 | 12.513 h |
| August | 27.8°C21.7°C | 21.7°C | 91 | 16.9 | 12.412 h |
| September | 28.2°C21.9°C | 21.9°C | 132 | 22.0 | 12.212 h |
| October | 28.9°C22.1°C | 22.1°C | 116 | 21.1 | 12.012 h |
| November | 30.1°C22.2°C | 22.2°C | 57 | 10.9 | 11.812 h |
| December, selected | 31.9°C21.8°C | 21.8°C | 18 | 3.4 | 11.712 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
December in nearby cities
- Berekum in DecemberGhana · 31 kmHigh 32.1°C · Low 21.8°C · 13 mm rain
- Techiman in DecemberGhana · 51 kmHigh 32.2°C · Low 21.2°C · 22 mm rain
- Japekrom in DecemberGhana · 57 kmHigh 32.4°C · Low 21.9°C · 15 mm rain
- Bondoukou in DecemberIvory Coast · 94 kmHigh 32.6°C · Low 20.9°C · 15 mm rain
- Kumasi in DecemberGhana · 106 kmHigh 31.2°C · Low 22.4°C · 22 mm rain
- Ejura in DecemberGhana · 107 kmHigh 33.5°C · Low 22.2°C · 11 mm rain
- Abengourou in DecemberIvory Coast · 146 kmHigh 31.4°C · Low 22.5°C · 18 mm rain
- Obuase in DecemberGhana · 146 kmHigh 30.5°C · Low 22.5°C · 25 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Sunyani) is explained once on the Sunyani year overview and on the Sources, method and limits page.