Climate and monthly weather forecast
Vanimo, Papua New Guinea

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The climate of Vanimo

Predominantly conforming to the Af criteria under the Köppen climate classification, Vanimo, Papua New Guinea is situated in a region that experiences a Tropical Rainforest climate. Weather conditions here are earmarked by excessive humidity throughout the year, punctuated by substantial precipitation, and minimal temperature variation.

The monthly average high temperatures revolve around distinct narrow fluctuations, and witness a transition from 28.7°C (83.7°F) to 29.4°C (84.9°F) across the year. A similar pattern is reflected in the monthly average low temperatures, which range from 24.7°C (76.5°F) to 25.4°C (77.7°F). The relative humidity remains fairly consistent from January to December, with variations mainly limited between 79% to 82%.

Consistent rainfall is a key characteristic of the weather in Vanimo, with cummulative rainfall values ranging from 61mm (2.4") in September to 219mm (8.62") in December. Reflecting this trend, the number of rainfall days varies from 19.8 in October to 28.6 in Janurary. The sea temperatures hover from 29°C (84.2°F) to 29.8°C (85.6°F) throughout the year, making sea activities pleasurable all year round.

Wind speed varies from 9km/h (5.6mph) to 12.4km/h (7.7mph) with a hint of gustiness evident in measurements that go up to 18.8km/h (11.7mph). Corroborating with the rainfall tendency, cloud cover percentage also fluctuates within a modest range from 36% to 48%. The overall pressure ranges from 1007.7mb to 1009.8mb.

The best time to visit Vanimo

While weather in Vanimo holds consistency throughout the year, the most opportune time for a visit would be between May and October. The weather during this timeframe is mildly more predictable, with lower humidity readings (80% to 79%), reduced precipitation (ranging from 61mm (2.4") to 156mm (6.14")), and greater sunshine hours (8.4 to 8.7 hours daily).

The worst time to visit Vanimo

It could be argued that the least favourable period to visit Vanimo is during the months of November, December, and January. These months are characterized by the highest rainfall coupled with increased cloud percentage (40% to 45%). Moreover, the relative humidity also witnesses a slight increase, reaching its peak at 81% to 82%.

Spring weather in Vanimo

In Vanimo, the spring months from September to November showcase relatively stable temperatures, with averages ranging between 29.1°C (84.4°F) to 29.4°C (84.9°F) for the highs and 24.7°C (76.5°F) to 25.4°C (77.7°F) for the lows. This period witnesses diminishing rainfall, as the dosage drops from 102mm (4.02") in May to 61mm (2.4") in September.

Summer weather in Vanimo

Throughout the summer months of December to February, Vanimo experiences its highest rainfall levels, with amounts swelling from 219mm (8.62") in December to 200mm (7.87") in February. With temperatures ranging from 28.9°C (84°F) to 29.3°C (84.7°F) (highs) and 25.1°C (77.2°F) to 25.4°C (77.7°F) (lows), summer here is marked by a surge in humidity which peaks between 81% and 82%.

Autumn weather in Vanimo

Autumn arrives in Vanimo with a slight decline in rainfall, as the numbers decrease from 200mm (7.87") in March to 123mm (4.84") in May. Average high temperatures range from 29°C (84.2°F) to 29.3°C (84.7°F), whereas the lows maintain their cool composure between 25°C (77°F) to 25.3°C (77.5°F). The sea temperatures, during this period, average between 29.1°C (84.4°F) and 29.7°C (85.5°F).

Winter weather in Vanimo

Winter in Vanimo shows little to no contrast from the rest of the year due to its tropical geographical positioning. With temperatures oscillating between 29°C (84.2°F) to 29.3°C (84.7°F) (highs) and 25.1°C (77.2°F) to 24.8°C (76.6°F) (lows), the season remains warm and humid. Rainfall levels recede somewhat, with monthly averages decreasing from 159mm (6.26") in April to 83mm (3.27") in July. Despite the constant rainfall, winter days are relatively sunnier, with an average of 12 hours of daylight per day.

Weather in January

January in Vanimo, Papua New Guinea, is characterized by warm temperatures and high humidity. An increase in extreme weather events is often associated with January, with the highest rainfall of 200mm (7.87") observed during this month. Weather in January »

Weather in February

Moving into February, the rainfall slightly reduces, while the temperature and humidity remain fairly consistent. This month experiences slightly lower rainfall compared with January. February's climate, similar to the previous month, supports lush vegetation growth and leads to a vibrant natural environment. Weather in February »

Weather in March

March marks the continuation of similar weather patterns observed in February, with minimal changes in temperature and humidity. This month witnesses a slight increase in rainfall compared with the last month, returning to levels seen in January. Weather in March »

Weather in April

The transition from March to April results in minor decreases in temperature, whereas the humidity level maintains its stability. The amount of rainfall in April is comparable to that in February, yet it is significantly lower than in March. Weather in April »

Weather in May

May in Vanimo offers a momentary deviation from the usual weather patterns, featuring reduced rainfall and slightly increased temperature levels. This is the driest month of the year, with rainfall reaching a low of 123mm (4.84"). Wind speeds continue to follow a steady trend, offering cool breezes throughout the day. Weather in May »

Weather in June

June showcases the continuation of the trend initiated in May, with a decline in rainfall and consistent temperature. The trend of reducing rainfall continues, yet it doesn't affect the overall humidity. Cloud cover still plays a significant role in protecting the land from the harsh rays of the sunshine. Weather in June »

Weather in July

July in Vanimo is another month of warm temperatures, with rainfall further tracing a downward trend. The rainfall for the month decreases slightly from June, marking another month of reduced precipitation. Notably, wind speeds remain almost unchanged, lending a familiar pattern to the weather. Weather in July »

Weather in August

August, while providing similar weather conditions to July, features an upturn in rainfall. Compared to July, the amount of rainfall observed in August increases moderately. As per the trend, the wind speed is nearly consistent with the previous months. Weather in August »

Weather in September

September rings in with slight variations in temperature, while the rainfall observes a decrease compared to August. Precipitation reduces to a low point again, similar to May levels. The sun shines for a nearly constant time, restricting sudden changes in temperature. Weather in September »

Weather in October

October signifies the resurgence of rainfall, recurring to previous levels. The city experiences an uptick in rainfall, drawing parallels with August's downpour. These showers do not considerably affect the temperature, contributing to maintaining a warm climate. Weather in October »

Weather in November

In November, Vanimo observes consistent temperatures along with a rise in rainfall. This month records a further increase in rainfall from October, returning to a pattern seen earlier in the year. Despite the rise in precipitation, sunshine hours remain quite constant, leading to continued warm days. Weather in November »

Weather in December

December brings the highest rainfall observed since January. The city experiences a significant rainfall of 219mm (8.62"), thereby bringing the year to a wet close. The temperature does not undergo any drastic changes, adhering to the overall annual trend. Weather in December »

Frequently asked questions

How many days does it rain?

Throughout the year, there are 282.5 rainfall days, and 1655mm (65.16") of precipitation is accumulated.

What is the month with the lowest UV index?

January and December, with an average maximum UV index of 6, are months with the lowest UV index.

What are the months with the highest UV index?

February through November, with an average maximum UV index of 7, are months with the highest UV index.

What is the coldest month?

March and July, with an average high-temperature of 28.7°C (83.7°F), are marked as the coldest months.

What is the most humid month?

March and April, with an average relative humidity of 82%, are most humid months.

What is the month with the least sunshine?

March has the least sunshine of the year, with an average of 7.4h of sunshine.

What are the months with the most sunshine?

The months with the most sunshine are May and October, with an average of 8.7h of sunshine.

What is the month with the shortest days?

June has the shortest days of the year, with an average of 12h and 0min of daylight.

When is the sea coldest?

With an average sea temperature of 29°C (84.2°F), August is the month with the coldest seawater.

What is the least humid month?

The months with the lowest humidity are September and October, with an average relative humidity of 79%.

What is the driest month?

The month with the least rainfall is September, when the rain falls for 19.9 days and typically collects 61mm (2.4") of precipitation.

When is the sea warmest?

October and November, with an average sea temperature of 29.8°C (85.6°F), are months with the warmest seawater in Vanimo, Papua New Guinea.

What part of the year is the hottest?

November, on average, is the warmest month, registering a high temperature of 29.4°C (84.9°F) and a low of 25.4°C (77.7°F).

What is the wettest month?

December is the month with the most rainfall in Vanimo. Rain falls for 26.8 days and accumulates 219mm (8.62") of precipitation.

When are the longest days?

With an average of 12h and 18min of daylight, December has the longest days of the year.

Is there Daylight Saving Time (DST)?

Vanimo does not observe Daylight Saving Time (DST). +10 timezone is used over the entire year.

Average temperature
Vanimo, Papua New Guinea

Average temperature - Vanimo, Papua New Guinea

The warmest month (with the highest average high temperature) is November (29.4°C).
The months with the lowest average high temperature are March and July (28.7°C).

The months with the highest average low temperature are November and December (25.4°C).
The coldest month (with the lowest average low temperature) is September (24.7°C).

Average pressure
Vanimo, Papua New Guinea

Average pressure - Vanimo, Papua New Guinea

The month with the highest atmospheric pressure is September (1009.8mbar).
The month with the lowest atmospheric pressure is December (1007.7mbar).

Average wind speed
Vanimo, Papua New Guinea

Average wind speed - Vanimo, Papua New Guinea

The windiest month (with the highest average wind speed) is March (12.4km/h).
The calmest month (with the lowest average wind speed) is May (9km/h).

Average humidity
Vanimo, Papua New Guinea

Average humidity - Vanimo, Papua New Guinea

The months with the highest relative humidity are March and April (82%).
The months with the lowest relative humidity are September and October (79%).

Average rainfall
Vanimo, Papua New Guinea

Average rainfall - Vanimo, Papua New Guinea

The wettest month (with the highest rainfall) is December (219mm).
The driest month (with the least rainfall) is September (61mm).

Average rainfall days
Vanimo, Papua New Guinea

Average rainfall days - Vanimo, Papua New Guinea

The month with the highest number of rainy days is January (28.6 days).
The month with the least rainy days is October (19.8 days).

Average sea temperature
Vanimo, Papua New Guinea

Average sea temperature - Vanimo, Papua New Guinea

The best months for swimming (with the highest average sea temperature) are October and November (29.8°C).
The coldest month (with the lowest average sea temperature) is August (29°C).

Average daylight / Average sunshine
Vanimo, Papua New Guinea

Average daylight / Average sunshine - Vanimo, Papua New Guinea

The month with the longest days is December (Average daylight: 12h and 18min).
The month with the shortest days is June (Average daylight: 12h and 0min).

The months with the most sunshine are May and October (Average sunshine: 8h and 42min).
The month with the least sunshine is March (Average sunshine: 7h and 24min).

Average sunshine days
Vanimo, Papua New Guinea

Average sunshine days - Vanimo, Papua New Guinea

The month with the most sunshine days is October (9.6 days).
The month with the least sunshine days is January (1.6 days).

Average UV index
Vanimo, Papua New Guinea

Average UV index - Vanimo, Papua New Guinea

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

Average visibility
Vanimo, Papua New Guinea

Average visibility - Vanimo, Papua New Guinea

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

Vanimo, Papua New Guinea

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