Climate and monthly weather forecastOndame, Guinea-Bissau
Climate and monthly weather forecast
The climate of Ondame
Ondame, located in Guinea-Bissau, resides in the climactic jurisdiction of an Aw Köppen climate that corresponds to a tropical climate marked by wet and dry seasons. Its position on the globe, near the equator, ensures a consistent, year-round high solar penetration, which in turn leads to persistent tropical temperatures.Throughout the year, the temperatures range from a low average of 21.8°C (71.2°F) to a high average of 34.9°C (94.8°F). There is apparent stability in Ondame's temperature with slight variations, primarily between June and September. Climate stability extends also to sunshine with averages of daylight around 12 hours throughout the year. An interesting pattern occurs within the course of the year with respect to rainfall. Months from December to April receive nearly no rainfall as the recorded amounts hardly exceed 1mm (0.04"). A sudden surge is noted from May with 30mm (1.18"), peaking between the months of July and August demonstrating an average rainfall of 250mm (9.84"). Such higher volume of precipitation contributes to an increase in humidity as well during these months, reaching up to a relative humidity of 77% to 82%.
The best time to visit Ondame
Judging by the climatic patterns, the ideal time to visit Ondame would be from November to April. During these months, the area experiences the least amount of rainfall with almost negligible measurements along with moderate average temperatures ranging from 21.8°C (71.2°F) to 35°C (95°F). These months transmit an abundance of sunshine with an average above 9 hours daily, which could enrich the outdoor experiences of visitors.The worst time to visit Ondame
The least hospitable months for travelers to Ondame center around the midyear. Particularly from June to August, the amount of rainfall dramatically escalates to an average of 250mm (9.84"), creating more humid conditions and reducing visibility slightly to 9km (5.6mi). These conditions could hamper outdoor activities and limit the overall visitor experience.Spring weather in Ondame
In Ondame, spring spans from March to May, encompassing a transition from dry to wet conditions. By March, temperatures remain steady, hovering near a high of 35.5°C (95.9°F) and low of 22.8°C (73°F). April witnesses the first signs of rainfall, albeit only 1mm (0.04"), with a slight increase in humidity to 50%. May marks the commencement of the rainy season with an average rainfall of 7mm (0.28"), cooling the high temperature to 33.7°C (92.7°F).Summer weather in Ondame
Summertime in Ondame, from June to August, embraces the year's most vigorous rainfall. In this period, rainfall rockets from an average of 30mm (1.18") in June to a notable 250mm (9.84") between July and August. This spike initiates a substantial increase in humidity, in tune with the temperature decreasing to a high of 30.7°C (87.3°F) and low of 25.4°C (77.7°F). Despite the rain, daylight remains stable averaging 12.7 hours.Autumn weather in Ondame
Autumn, from September to November, brings relief from the high precipitation levels of summer. Rainfall recedes rapidly from 132mm (5.2") to 8mm (0.31") by November. Average temperatures rise slightly, shifting from a low of 25°C (77°F) to a high of 34.3°C (93.7°F), and humidity levels trail off to an average of 57%.Winter weather in Ondame
Winter in Ondame spreads from December to February, with an average high temperature varying narrowly from 34.2°C (93.6°F) to 34°C (93.2°F), while the average low temperature rests between 21.8°C (71.2°F) to 22.1°C (71.8°F). With meager rainfall recorded as 1mm (0.04") or less during this period, humidity decreases, and sunshine duration remains abundant at around 9 hours daily. This period also reports decreased wind speeds ranging from 11.2km/h (7mph) to 11.6km/h (7.2mph).Weather in January
The arid compassion characteristic of January keeps Ondame, Guinea-Bissau extremely dry, with no measurable rainfall. Comparable to the previous and subsequent month, the weather in January presents a familiar pattern of modest temperatures and exceptionally low humidity. Weather in January »Weather in February
The climate change is slow as February inches in, maintaining a dry weather pattern in Ondame, Guinea-Bissau. It sees a slight rise in maximum and minimum temperature, at 34.9°C (94.8°F) and 22.1°C (71.8°F) respectively. Loyal, to the preceding month, the winds continue to wade their way through the city. Weather in February »Weather in March
A subtle shift in climatic conditions announces March in Ondame, going a step ahead in humidity and temperature. While the city's weather traits continue to resemble those of February, a small augmentation can be observed. The rise in moisture in the air is accompanied by a halo of heat with temperatures peaking at 35.5°C (95.9°F) and bottoming at 22.8°C (73°F). Weather in March »Weather in April
April brings an upheaval in weather, marking the arrival of the wet season in Ondame, Guinea-Bissau. This situation indicates a credible departure from the preceding months as the city sees an upsurge in humidity and rainfall. The temperatures hit a high of 35°C (95°F) and lows plummet to settle at 23.5°C (74.3°F). Weather in April »Weather in May
As Ondame, Guinea-Bissau strides into May, it fully embraces the wet season. A considerable surge in humidity and rainfall sets it apart from the previous months. Likewise, temperatures oscillate within a smaller band, hitting a high of 33.7°C (92.7°F) and a low of 24.4°C (75.9°F). Weather in May »Weather in June
June in Ondame, Guinea-Bissau, amplifies the wet season, instigating substantial climatic shifts. This scenario underscores a dramatic departure from the previous and subsequent months, dominated by high humidity and frequent rains. Weather in June »Weather in July
July, in Ondame, Guinea-Bissau, marks the peak of the wet season, with rainfall topping at 226mm (8.9"). The city witnesses the highest humidity levels, with dropping temperatures, experiencing highs of 30.7°C (87.3°F) and lows of 25.4°C (77.7°F). Weather in July »Weather in August
In the wake of July's climatic climax, August maintains the intensity of the wet season in Ondame, Guinea-Bissau. The city endures frequent and heavy showers, while temperatures hover around the 29.6°C (85.3°F) mark. The similarity to July extends to other weather aspects as well, including the wind speed and daylight hours. Weather in August »Weather in September
As September dawns upon Ondame, Guinea-Bissau, a gradual recession of the wet season is discernible. This month marks the beginning of a retreat from the rain-ridden months, showcasing a slight reduction in rainfall leading to a reboot of the dry cycle. Weather in September »Weather in October
October brings respite to Ondame, Guinea-Bissau, as the wet season starts to wind down. Temperatures start rising once again, hitting a high of 32.9°C (91.2°F), a clear demarcation from the previous and following month. The city’s weather transitions progressively from the heavy rainy patterns to more tranquil sunny days. Weather in October »Weather in November
As November unfolds in Ondame, Guinea-Bissau, the dry season formally kicks in, setting it apart from the preceding months. The city experiences significantly reduced rainfall, with the sunshine hours peaking at 9.7 per day, reminiscent of the dry season. Weather in November »Weather in December
December in Ondame, Guinea-Bissau presents an amalgamation of dry season traits and colder winds, culminating the weather cycle. Whereas it’s reminiscent of November's weather, this month sees slightly lower temperatures. Highs hover around 34°C (93.2°F) while the lows plummet to 22.5°C (72.5°F). Weather in December »Updated: Feb 5, 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
With an average relative humidity of 32%, January is the least humid month in Ondame.
In Ondame, Guinea-Bissau, rain does not fall in January and February.
Throughout the year, in Ondame, Guinea-Bissau, there are 107.5 rainfall days, and 726mm (28.58") of precipitation is accumulated.
The months with the highest UV index in Ondame, Guinea-Bissau, are January through December, with an average maximum UV index of 7.
The months with the lowest UV index in Ondame, Guinea-Bissau, are January through December, with an average maximum UV index of 7.
March is the month when Ondame sees the average highest temperatures, with a high of 35.5°C (95.9°F) and a low of 22.8°C (73°F).
March through December are months with rainfall in Ondame.
The months with the most sunshine are March through May, with an average of 9.9h of sunshine.
With an average of 12h and 48min of daylight, June has the longest days of the year.
August is the month that records the lowest temperatures in Ondame, with averages ranging from a high of 29.6°C (85.3°F) to a low of 25°C (77°F).
The most humid month in Ondame is August, with an average relative humidity of 82%.
August is the month with the most rainfall in Ondame. Rain falls for 26.9 days and accumulates 270mm (10.63") of precipitation.
August has the least sunshine of the year in Ondame, with an average of 6.1h of sunshine.
December has the shortest days of the year in Ondame, Guinea-Bissau, with an average of 11h and 24min of daylight.
Ondame, Guinea-Bissau, does not utilize Daylight Saving Time (DST). GMT timezone is used throughout the entire year.
Average temperature
Ondame, Guinea-Bissau
The warmest month (with the highest average high temperature) is March (35.5°C).
The month with the lowest average high temperature is August (29.6°C).
The month with the highest average low temperature is June (26°C).
The coldest month (with the lowest average low temperature) is January (21.8°C).
Average pressure
Ondame, Guinea-Bissau
- Average pressure in January:
1011.5mbar - Average pressure in February:
1010.5mbar - Average pressure in March:
1010.1mbar - Average pressure in April:
1010.1mbar - Average pressure in May:
1011.1mbar - Average pressure in June:
1012.6mbar
- Average pressure in July:
1012.9mbar - Average pressure in August:
1012.4mbar - Average pressure in September:
1012.2mbar - Average pressure in October:
1011.2mbar - Average pressure in November:
1010.6mbar - Average pressure in December:
1011.2mbar
The month with the highest atmospheric pressure is July (1012.9mbar).
The months with the lowest atmospheric pressure are March and April (1010.1mbar).
Average wind speed
Ondame, Guinea-Bissau
- Average wind speed in January:
11.2km/h - Average wind speed in February:
11.5km/h - Average wind speed in March:
11.6km/h - Average wind speed in April:
12.1km/h - Average wind speed in May:
13.1km/h - Average wind speed in June:
13.2km/h
- Average wind speed in July:
12.1km/h - Average wind speed in August:
12.1km/h - Average wind speed in September:
9.7km/h - Average wind speed in October:
9km/h - Average wind speed in November:
9km/h - Average wind speed in December:
10.6km/h
The windiest month (with the highest average wind speed) is June (13.2km/h).
The calmest months (with the lowest average wind speed) are October and November (9km/h).
Average humidity
Ondame, Guinea-Bissau
The month with the highest relative humidity is August (82%).
The month with the lowest relative humidity is January (32%).
Average rainfall
Ondame, Guinea-Bissau
The wettest month (with the highest rainfall) is August (270mm).
The driest months (with the least rainfall) are January and February (0mm).
Average rainfall days
Ondame, Guinea-Bissau
- Average rainfall days in January:
0.3 days - Average rainfall days in February:
0.4 days - Average rainfall days in March:
0.7 days - Average rainfall days in April:
2.2 days - Average rainfall days in May:
3.8 days - Average rainfall days in June:
9.2 days
- Average rainfall days in July:
23.4 days - Average rainfall days in August:
26.9 days - Average rainfall days in September:
20.7 days - Average rainfall days in October:
15.6 days - Average rainfall days in November:
3.6 days - Average rainfall days in December:
0.7 days
The month with the highest number of rainy days is August (26.9 days).
The month with the least rainy days is January (0.3 days).
Average daylight / Average sunshine
Ondame, Guinea-Bissau
- Average daylight in January:
11h and 30min - Average daylight in February:
11h and 48min - Average daylight in March:
12h and 6min - Average daylight in April:
12h and 24min - Average daylight in May:
12h and 42min - Average daylight in June:
12h and 48min
- Average daylight in July:
12h and 42min - Average daylight in August:
12h and 30min - Average daylight in September:
12h and 12min - Average daylight in October:
11h and 54min - Average daylight in November:
11h and 36min - Average daylight in December:
11h and 24min
The month with the longest days is June (Average daylight: 12h and 48min).
The month with the shortest days is December (Average daylight: 11h and 24min).
- Average sunshine in January:
9h and 42min - Average sunshine in February:
9h and 48min - Average sunshine in March:
9h and 54min - Average sunshine in April:
9h and 54min - Average sunshine in May:
9h and 54min - Average sunshine in June:
9h and 0min
- Average sunshine in July:
6h and 54min - Average sunshine in August:
6h and 6min - Average sunshine in September:
7h and 30min - Average sunshine in October:
9h and 12min - Average sunshine in November:
9h and 42min - Average sunshine in December:
9h and 42min
The months with the most sunshine are March, April and May (Average sunshine: 9h and 54min).
The month with the least sunshine is August (Average sunshine: 6h and 6min).
Average sunshine days
Ondame, Guinea-Bissau
- Average sunshine days in January:
30.7 days - Average sunshine days in February:
27.6 days - Average sunshine days in March:
30.2 days - Average sunshine days in April:
27.8 days - Average sunshine days in May:
25.8 days - Average sunshine days in June:
20.2 days
- Average sunshine days in July:
5.6 days - Average sunshine days in August:
2.9 days - Average sunshine days in September:
8 days - Average sunshine days in October:
13.2 days - Average sunshine days in November:
24.3 days - Average sunshine days in December:
29.8 days
The month with the most sunshine days is January (30.7 days).
The month with the least sunshine days is August (2.9 days).
Average UV index
Ondame, Guinea-Bissau
The months with the highest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 7).
The months with the lowest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 7).
Average cloud cover
Ondame, Guinea-Bissau
The month with the most cloud cover is August (Cloud cover 57).
The months with the least cloud cover are March and April (Cloud cover 7).
Average visibility
Ondame, Guinea-Bissau
The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (10km).
The months with the lowest visibility are July and August (9km).
