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Contents
- The climate of Sunyani
- The best time to visit Sunyani
- The worst time to visit Sunyani
- Spring weather in Sunyani
- Summer weather in Sunyani
- Autumn weather in Sunyani
- Winter weather in Sunyani
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
Climate and monthly weather forecast
The climate of Sunyani
Sunyani, a city in Ghana, enjoys a tropical wet and dry climate, also known as savanna climate indicated by the Köppen climate classification as 'Aw'. Positioned close to the equator, this area experiences significant annual temperature variation from 19.8°C (67.6°F) to 37°C (98.6°F), with high levels of humidity averaging between 44% and 89%.
Sunyani's local weather presents a notable contrast throughout the year, especially in regards to rainfall and daylight hours. This location receives rainfall that ranges across the year somewhat consistently, seeing values from 4mm (0.16") up to 129mm (5.08"). Daylight hours mostly fluctuate between 11.7 hours and 12.5 hours per day, whereas annual sunshine hours decrease during the wetter season to as low as 5.4 hours.
Highlighting unique patterns, one will notice maximum rainfall during the month of October, with September following close behind at 112mm (4.41"). Coupled with the highest relative humidity, these wet months mark the height of the rainy season. Another interesting aspect of Sunyani's weather is a spike in average wind speed witnessed in April, reaching a peak of 7.8km/h (4.8mph) before gradually subsiding.
Sunyani's local weather presents a notable contrast throughout the year, especially in regards to rainfall and daylight hours. This location receives rainfall that ranges across the year somewhat consistently, seeing values from 4mm (0.16") up to 129mm (5.08"). Daylight hours mostly fluctuate between 11.7 hours and 12.5 hours per day, whereas annual sunshine hours decrease during the wetter season to as low as 5.4 hours.
Highlighting unique patterns, one will notice maximum rainfall during the month of October, with September following close behind at 112mm (4.41"). Coupled with the highest relative humidity, these wet months mark the height of the rainy season. Another interesting aspect of Sunyani's weather is a spike in average wind speed witnessed in April, reaching a peak of 7.8km/h (4.8mph) before gradually subsiding.
The best time to visit Sunyani
When selecting the best timeframe to visit Sunyani, it is advisable to consider the dry season. This stretches from November to April, indicated by relatively low rainfall, ranging from 4mm (0.16") to 83mm (3.27"). Additionally, during this period, the relative humidity drops significantly to a range of 44% to 72%, providing a much more comfortable environment. Sunshine hours are also at their greatest during this time, averaging between 7 hours and 9.8 hours per day, thereby enhancing the overall visiting experience.
The worst time to visit Sunyani
The months from May to October might not present the most favorable conditions for visiting Sunyani. Heavy rainfall in these months, especially in September and October with up to 129mm (5.08"), is accompanied by the highest relative humidity levels of the year, reaching 89%. This combination of conditions can make outdoor activities and travel quite uncomfortable.
Spring weather in Sunyani
In Sunyani, typical spring months (March, April, and May) showcase a transition in climate. The temperature starts to decrease incrementally from a peak of 37°C (98.6°F) in March to 35.5°C (95.9°F) in April and further, to 34°C (93.2°F) by May. Rainfall starts to increase significantly, reaching 83mm (3.27") in May. Concurrently, relative humidity also rises, elevating from 66% in March to a higher level of 79% by May.
Summer weather in Sunyani
The months of June, July, and August, classified as summer in Sunyani, witness a consistent drop in temperature, with average high temperatures descending to 28.8°C (83.8°F) by July. These months also carry the brunt of the rainy season, with high rainfall counts and relative humidity exceeding 85%. The number of sunshine hours tapers down further, presenting one of the cloudiest periods of the year, with cloud cover rising up to 71%.
Autumn weather in Sunyani
September, October, and November in Sunyani, categorized as Autumn, continue the trend of decreasing temperatures, bottoming out at 30.8°C (87.4°F) in November. This season is notable for witnessing the highest rainfall, peaking at 129mm (5.08") in the month of October. Consequently, relative humidity also reaches the annual maximum of 89% in September. The hours of sunshine hit their annual low, with an average of 5.6 for both September and October.
Winter weather in Sunyani
Winter in Sunyani features a return of warmer, drier conditions. December, January, and February observe an upward trend in temperature, with the highest yielding 37°C (98.6°F) in February. The rainfall decreases significantly, going as low as 4mm (0.16") in both December and February. Correspondingly, the relative humidity drops to the annual minimum of 44% in December. Sunshine hours increase progressively, reaching a peak of 9.8 hours per day in February. The weather transition during winter makes it quite a favorable time for visitors to explore Sunyani.
Weather in January
The weather in January in Sunyani, Ghana remains comfortably hot, marking the transition period from the high humidity, rainfall, and cloudiness months of the previous year, offering less cloudy skies. Sunbathing can be enjoyed in January, thanks to the least cloud coverage of 13%, painting the sky with the beauty of the bronzing sun. Weather in January »
Weather in February
As Sunyani, Ghana walks further into the year, February brings with it subtle changes in the weather pattern. The wind speed picks up slightly, gusting across the city from one corner to another. It borrows a flavor from the bygone January in terms of similar temperatures and weather conditions experienced. Weather in February »
Weather in March
March in Sunyani ushers in more significant shifts in the climatic patterns with humid winds blowing across the regions. With a peak in average rainfall recorded at 68mm (2.68") and 20.2 rain-soaked days, the city becomes a canvas painted with hues of life and happiness. Weather in March »
Weather in April
April unfolds in the city of Sunyani, marking the height of the first major rainy season with strategic intervals of sunshine. Residents bustle around, adapting to the slightly cooler temperatures. The city is graced with the highest rainfall of 83mm (3.27") recorded in the year, offering a refreshing retreat from the preceding heat. Weather in April »
Weather in May
May in Sunyani remains characteristically similar to April in terms of climatic conditions with the rainy season in full swing. The city landscape transforms, adorning a fresh green robe enhanced by the temperate May weather. Thunderstorms become a common evening phenomenon, providing a unique natural spectacle for the city's inhabitants. Weather in May »
Weather in June
As Sunyani transitions into June, it embarks on a journey towards the peak of the wet season. The city tunes itself to the sound of falling raindrops with a rhythm that eventually becomes a routine for June. Notably, June witnesses the highest level of relative humidity of 85% in the year. Weather in June »
Weather in July
Sunyani enters July retaining much of the heavy rainfall and high humidity pattern observed in preceding months. The city juggles with rain-filled clouds painting the sky grey, and the gradually fading warmth of the sun. However, it is notable that visibility reduces slightly, as the increased humidity lends a hazy tint to the cityscape. Weather in July »
Weather in August
August begins in the city with the hustle and bustle of life carrying on, despite the persistence of the rainy season. August is a near twin of July weather-wise, with marginally lower temperatures and minimal changes in rainfall and humidity levels. Weather in August »
Weather in September
Month of September brings Sunyani into a period of transition. Rainfall peaks for the second time in the year at an astounding 112mm (4.41") turning the city into a fresh panorama. Temperatures drop slightly as the city prepares itself for the upcoming dry months. Weather in September »
Weather in October
Entering October, Sunyani begins to witness a decrease in rainfall, indicating a transitional phase from the second rainy season to the upcoming dry period. The city's weather balances between sunny days and cooler nights, making it ideal for enjoying the great outdoors. Weather in October »
Weather in November
As November progresses, Sunyani enters the dry season, a period marked by significant climatic change. The city landscapes are painted in warm hues, enhanced by the declining rainfall and cooling temperatures. When compared to the previous month, a noticeable increase in the duration of sunshine offers ample opportunity for outdoor activities. Weather in November »
Weather in December
For Sunyani, December is a month of celebration with the arrival of pleasant weather characterized by drier conditions and cooler days. The dry season stands at its peak as the year ends, offering Sunyani sunny days and starry nights. Weather in December »
Updated: Aug 14, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the least humid month?
January is the least humid month, with an average relative humidity of 44%.
What is the driest month?
The months with the least rainfall are January and December Rain falls for 3.6 days and accumulates 4mm (0.16") of rain.
How many days does it rain?
In Sunyani, during the entire year, the rain falls for 211.3 days and collects up to 716mm (28.19") of precipitation.
What month has the most sunshine?
The month with the most sunshine is January, with an average of 9.8h of sunshine.
What is the month with the highest UV index?
The months with the highest UV index are January through April, October through December, with an average maximum UV index of 7.
What is the hottest time of year?
Temperature readings in Sunyani reach their annual highs in February, averaging 37°C (98.6°F) and a minimum average of 21.9°C (71.4°F).
When are the longest days?
The month with the longest days is June, with an average of 12h and 30min of daylight.
What are the coldest months?
During the coldest month in Sunyani, July, temperatures average a high of 28.8°C (83.8°F) and a low of 20.9°C (69.6°F).
What is the month with the least sunshine?
August has the least sunshine of the year, with an average of 5.4h of sunshine.
What is the month with the lowest UV index?
August is the month with the lowest UV index, with an average maximum UV index of 5.
What is the most humid month?
September is the most humid month, with an average relative humidity of 89%.
What is the rainiest month?
October is the month with the most rainfall. Rain falls for 25.9 days and accumulates 129mm (5.08") of precipitation.
What is the month with the shortest days?
With an average of 11h and 42min of daylight, December has the shortest days of the year.
Is there Daylight Saving Time (DST)?
Sunyani does not utilize Daylight Saving Time (DST). GMT timezone is used over the entire year.
Average temperature
Sunyani, Ghana
The warmest month (with the highest average high temperature) is February (37°C).
The month with the lowest average high temperature is July (28.8°C).
The month with the highest average low temperature is March (23.4°C).
The coldest month (with the lowest average low temperature) is January (19.8°C).
Average pressure
Sunyani, Ghana
- Average pressure in January:
1010.7mbar - Average pressure in February:
1009.5mbar - Average pressure in March:
1009.5mbar - Average pressure in April:
1009.7mbar - Average pressure in May:
1011mbar - Average pressure in June:
1013.1mbar
- Average pressure in July:
1013.7mbar - Average pressure in August:
1013.4mbar - Average pressure in September:
1012.9mbar - Average pressure in October:
1011.4mbar - Average pressure in November:
1010.5mbar - Average pressure in December:
1010.6mbar
The month with the highest atmospheric pressure is July (1013.7mbar).
The months with the lowest atmospheric pressure are February and March (1009.5mbar).
Average wind speed
Sunyani, Ghana
- Average wind speed in January:
5.8km/h - Average wind speed in February:
6.8km/h - Average wind speed in March:
7.7km/h - Average wind speed in April:
7.8km/h - Average wind speed in May:
7.3km/h - Average wind speed in June:
7.4km/h
- Average wind speed in July:
7.5km/h - Average wind speed in August:
7.5km/h - Average wind speed in September:
6.1km/h - Average wind speed in October:
5.5km/h - Average wind speed in November:
5.6km/h - Average wind speed in December:
5.4km/h
The windiest month (with the highest average wind speed) is April (7.8km/h).
The calmest month (with the lowest average wind speed) is December (5.4km/h).
Average humidity
Sunyani, Ghana
The month with the highest relative humidity is September (89%).
The month with the lowest relative humidity is January (44%).
Average rainfall
Sunyani, Ghana
The wettest month (with the highest rainfall) is October (129mm).
The driest months (with the least rainfall) are January and December (4mm).
Average rainfall days
Sunyani, Ghana
- Average rainfall days in January:
3.6 days - Average rainfall days in February:
10.6 days - Average rainfall days in March:
20.2 days - Average rainfall days in April:
21.1 days - Average rainfall days in May:
22.4 days - Average rainfall days in June:
20 days
- Average rainfall days in July:
20.7 days - Average rainfall days in August:
21.6 days - Average rainfall days in September:
25.3 days - Average rainfall days in October:
25.9 days - Average rainfall days in November:
15.5 days - Average rainfall days in December:
4.4 days
The month with the highest number of rainy days is October (25.9 days).
The month with the least rainy days is January (3.6 days).
Average daylight / Average sunshine
Sunyani, Ghana
- Average daylight in January:
11h and 5min - Average daylight in February:
11h and 5min - Average daylight in March:
12h and 1min - Average daylight in April:
12h and 2min - Average daylight in May:
12h and 3min - Average daylight in June:
12h and 3min
- Average daylight in July:
12h and 3min - Average daylight in August:
12h and 2min - Average daylight in September:
12h and 1min - Average daylight in October:
12h and 0min - Average daylight in November:
11h and 5min - Average daylight in December:
11h and 4min
The month with the longest days is June (Average daylight: 12h and 30min).
The month with the shortest days is December (Average daylight: 11h and 42min).
- Average sunshine in January:
9h and 5min - Average sunshine in February:
9h and 2min - Average sunshine in March:
9h and 1min - Average sunshine in April:
9h and 4min - Average sunshine in May:
9h and 2min - Average sunshine in June:
7h and 1min
- Average sunshine in July:
5h and 4min - Average sunshine in August:
5h and 2min - Average sunshine in September:
5h and 4min - Average sunshine in October:
5h and 4min - Average sunshine in November:
7h and 0min - Average sunshine in December:
7h and 5min
The month with the most sunshine is January (Average sunshine: 9h and 48min).
The month with the least sunshine is August (Average sunshine: 5h and 24min).
Average sunshine days
Sunyani, Ghana
- Average sunshine days in January:
25.7 days - Average sunshine days in February:
14.4 days - Average sunshine days in March:
8.8 days - Average sunshine days in April:
7.4 days - Average sunshine days in May:
7.3 days - Average sunshine days in June:
8.1 days
- Average sunshine days in July:
8.7 days - Average sunshine days in August:
7.3 days - Average sunshine days in September:
3.5 days - Average sunshine days in October:
2.9 days - Average sunshine days in November:
10.4 days - Average sunshine days in December:
23.9 days
The month with the most sunshine days is January (25.7 days).
The month with the least sunshine days is October (2.9 days).
Average UV index
Sunyani, Ghana
The months with the highest UV index are January, February, March, April, October, November and December (UV index 7).
The month with the lowest UV index is August (UV index 5).
Average cloud cover
Sunyani, Ghana
The month with the most cloud cover is September (Cloud cover 72).
The month with the least cloud cover is January (Cloud cover 13).
Average visibility
Sunyani, Ghana
The months with the highest visibility are January and February (10km).
The months with the lowest visibility are June, July, September and October (6km).
