Climate and monthly weather forecast
Porto Novo, Benin

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The Nokoue Lake and city of Porto Novo, Benin
The Nokoue Lake and city of Porto Novo, Benin

The climate of Porto Novo

Porto Novo, the second largest city of Benin, experiences a tropical wet and dry climate as per the Köppen climate classification. This climate is typical of savannah regions where there is a distinct switch between the dry and wet seasons.

Throughout the year, the mercury usually soars from 24°C (75.2°F) to a peak of 33.8°C (92.8°F), whereas humidity shows a moderate degree of variation, ranging from 67% to 81%. Porto Novo sees a significant amount of rainfall with an annual shift from mere 7mm (0.28") to a high of 110mm (4.33"). The daylight hours remain relatively consistent throughout the year, moving slighty from 11.8 hours to a zenith of 12.5 hours. The percentage of cloud cover exhibits a noticeable variation as well, with a yearly swing between 15% and 61%.

A noteworthy pattern that emerges from this data set is in relation to rainfall. The city goes through extreme fluctuations, from nearly bare months with only 7mm (0.28") to months made damp by a considerable 110mm (4.33"). Unwrapping the temperature data, it is evident that Porto Novo almost hangs on a constant temperature thread throughout the year, with only minor variations. Porto Novo also showcases unique wind patterns that swings between 8.8km/h (5.5mph) and 13.4km/h (8.3mph).

The best time to visit Porto Novo

Considering temperature, humidity, and precipitation patterns, the prime time to explore Porto Novo is between November and February. During these months, the city sees relatively lower humidity, reduced rainfall and the temperature ranges from 24.4°C (75.9°F) to 33.6°C (92.5°F) making it delightful for sightseeing and outdoor activities.

The worst time to visit Porto Novo

June, July, and August may not be the best time to visit Porto Novo. These months receive the highest rainfall, recording up to 110mm (4.33"), paired with high humidity levels of 81%. Moreover, visibility could also be relatively lower due to cloud% reaching 60%, and this could make sightseeing less appealing.

Spring weather in Porto Novo

In Porto Novo, Spring falls in the months of March, April, and May. The temperature stays moderately high, fluctuating from 26.3°C (79.3°F) to 33.6°C (92.5°F). Rainfall, during this period, escalates from 11mm (0.43") in March to 40mm (1.57") in May. Despite this uptick in precipitation, the city enjoys a decent amount of sunshine, with daily sunshine hours hovering from 8.5 hours to 9.1 hours.

Summer weather in Porto Novo

The summer season in Porto Novo extends from June to August, and it is during this period that the city witnesses the highest amount of rainfall, particularly in June and July with precipitation levels soaring to 110mm (4.33"). The temperature hovers between 24.9°C (76.8°F) and 30.3°C (86.5°F).

Autumn weather in Porto Novo

Autumn in Porto Novo, taking place from September to November, experiences a downturn in rainfall from 64mm (2.52") in September to 19mm (0.75") in November. The temperature ranges from 24.5°C (76.1°F) to 32.4°C (90.3°F) alongside a drop in humidity from 81% to 77%.

Winter weather in Porto Novo

December to February is winter in Porto Novo. These months are typically drier with a temperature spectrum from 24°C (75.2°F) to 33.6°C (92.5°F) with decline in rainfall and an average rainfall of only 9mm (0.35") to 7mm (0.28"). Even sunlight is in abundance with daily sunshine hours reaching to a maximum during these months.

Weather in January

The new year commences with warm and humid conditions in Porto Novo, Benin. Temperatures range from 24°C (75.2°F) at night to a high of 33.8°C (92.8°F) during the day, however, it is the relative humidity of 67% that often makes the weather feel hotter. Weather in January »

Weather in February

The second month of the year not only sees an upswing in temperature but also a corresponding rise in relative humidity which now reaches 73%. The warming trend is marked by a modest increase, as daytime temperatures hover around 33.5°C (92.3°F), a slight shift from January's highs. Weather in February »

Weather in March

Ever so slightly hotter than February, March sees a continuing rise in Porto Novo's temperature which is paired with consistent humidity levels. The average temperature during the day continues to stay around 33.5°C (92.3°F), while rainfall sees a slight decline to 11mm (0.43"). Weather in March »

Weather in April

The gradual warming that defines the first quarter in Porto Novo culminates with April's weather. The city records some of the year's highest levels of rainfall with 15mm (0.59") spread over approximately eight days, somewhat more than March's rainfall. Weather in April »

Weather in May

May is marked by a significant break in temperature trends as Porto Novo begins experiencing slightly cooler weather, particularly when compared to April. In this time, the city experiences up to 40mm (1.57") of rainfall, a substantial increase that signifies the beginning of the rainy season. Weather in May »

Weather in June

The onset of the rainy season in June brings substantial changes to Porto Novo's weather. Lasting signs of the dry season are left behind as rainfall measures up to 110mm (4.33"), a staggering increase from May's rainfall. In addition, the city sees a marked reduction in the amount of sunshine it gets per day, in line with the start of the wet monsoon period. Weather in June »

Weather in July

July, the central month of the rainy season, is characterized by the highest levels of rainfall recorded in Porto Novo. With 110mm (4.33") of rain spread over about 24 days, the weather becomes perceptibly wetter, impacting visibility and cloud cover. Weather in July »

Weather in August

August continues the wet pattern set by July in Porto Novo albeit with slightly less intensity. The rainfall slightly drops to 37mm (1.46"), while the temperatures hover around 28.7°C (83.7°F) during the day. This noticeable drop in rainfall still does not signify the end of the wet period, as the city remains under consistent cloud coverage that blocks sunlight. Weather in August »

Weather in September

In September, after the highs of the rainy season, Porto Novo commences its transition to warmer and drier conditions. The rainfall escalates back to 64mm (2.52") spread over 19 days while temperatures start getting back to around 29.5°C (85.1°F). Weather in September »

Weather in October

By October, the rainy season has run its course and warmer temperatures start creeping back into the frame in Porto Novo. Rainfall drops considerably to 45mm (1.77") over approximately 13 days indicating that the monsoon period is coming to an end. Weather in October »

Weather in November

November heralds in the dry season in Porto Novo with dropping rainfall down to 19mm (0.75") and an increase in temperature reaching up to 32.4°C (90.3°F). The city also experiences an increase in the sunshine days, a signal of the season change. Weather in November »

Weather in December

December marks the peak of the dry season in Porto Novo, as weather conditions turn significantly hotter and drier. The city experiences one of the lowest rainfalls of the year measuring only 7mm (0.28"), whilst temperatures spike to around 33.6°C (92.5°F). Weather in December »
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Frequently asked questions

What part of the year is the hottest in Porto Novo?

Porto Novo reaches its average highest temperatures in January, measuring 33.8°C (92.8°F) at the peak and 24°C (75.2°F) at the lowest.

What is the least humid month in Porto Novo?

The least humid month in Porto Novo, Benin, is January, with an average relative humidity of 67%.

How much does it rain in Porto Novo?

Throughout the year, there are 148.7 rainfall days, and 481mm (18.94") of precipitation is accumulated.

What are the months with the highest UV index in Porto Novo?

The months with the highest UV index in Porto Novo, Benin, are January through May, August, October through December, with an average maximum UV index of 7.

What is the wettest month in Porto Novo?

The wettest months are June and July, with an average 110mm (4.33") of rainfall.

When are the longest days in Porto Novo?

With an average of 12h and 30min of daylight, June has the longest days of the year.

What is the month with the lowest UV index in Porto Novo?

June, July and September, with an average maximum UV index of 6, are months with the lowest UV index.

What is the most humid month in Porto Novo?

July through September, with an average relative humidity of 81%, are most humid months in Porto Novo.

What is the month with the least sunshine in Porto Novo?

The month with the least sunshine in Porto Novo is July, with an average of 5.4h of sunshine.

What time of the year is the coldest in Porto Novo?

August brings the lowest temperatures in Porto Novo, with an average high of 28.7°C (83.7°F) and an average low of 23.4°C (74.1°F).

What is the driest month in Porto Novo?

December is the month with the least rainfall in Porto Novo. Rain falls for 5.3 days and accumulates 7mm (0.28") of precipitation.

What is the month with the shortest days in Porto Novo?

December has the shortest days of the year in Porto Novo, Benin, with an average of 11h and 48min of daylight.

Is there Daylight Saving Time (DST) in Porto Novo?

Porto Novo does not utilize Daylight Saving Time (DST). WAT timezone is used over the entire year.

What month has the most sunshine in Porto Novo?

December has the most sunshine of the year in Porto Novo, with an average of 9.6h of sunshine.

Average temperature
Porto Novo, Benin

Average temperature - Porto Novo, Benin

The warmest month (with the highest average high temperature) is January (33.8°C).
The month with the lowest average high temperature is August (28.7°C).

The month with the highest average low temperature is April (26.8°C).
The coldest month (with the lowest average low temperature) is August (23.4°C).

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Average pressure
Porto Novo, Benin

Average pressure - Porto Novo, Benin

The month with the highest atmospheric pressure is July (1013.4mbar).
The months with the lowest atmospheric pressure are February and March (1009.4mbar).

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Average wind speed
Porto Novo, Benin

Average wind speed - Porto Novo, Benin

The windiest month (with the highest average wind speed) is August (13.4km/h).
The calmest month (with the lowest average wind speed) is December (8.8km/h).

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Average humidity
Porto Novo, Benin

Average humidity - Porto Novo, Benin

The months with the highest relative humidity are July, August and September (81%).
The month with the lowest relative humidity is January (67%).

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Average rainfall
Porto Novo, Benin

Average rainfall - Porto Novo, Benin

The wettest months (with the highest rainfall) are June and July (110mm).
The driest month (with the least rainfall) is December (7mm).

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Average rainfall days
Porto Novo, Benin

Average rainfall days - Porto Novo, Benin

The month with the highest number of rainy days is July (23.9 days).
The month with the least rainy days is January (4.8 days).

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Average daylight / Average sunshine
Porto Novo, Benin

Average daylight / Average sunshine - Porto Novo, Benin

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 48min).

The month with the most sunshine is December (Average sunshine: 9h and 36min).
The month with the least sunshine is July (Average sunshine: 5h and 24min).

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Average sunshine days
Porto Novo, Benin

Average sunshine days - Porto Novo, Benin

The month with the most sunshine days is January (24.9 days).
The month with the least sunshine days is July (4.5 days).

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Average UV index
Porto Novo, Benin

Average UV index - Porto Novo, Benin

The months with the highest UV index are January, February, March, April, May, August, October, November and December (UV index 7).
The months with the lowest UV index are June, July and September (UV index 6).

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Average visibility
Porto Novo, Benin

Average visibility - Porto Novo, Benin

The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (10km).
The month with the lowest visibility is January (9km).

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Porto Novo, Benin

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