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Contents
- The climate of Port Moresby
- The best time to visit Port Moresby
- The worst time to visit Port Moresby
- Spring weather in Port Moresby
- Summer weather in Port Moresby
- Autumn weather in Port Moresby
- Winter weather in Port Moresby
- 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 sea temperature
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
The mountains and beautiful clear waters surrounding the beautiful Port Moresby, in Papua New Guinea
The climate of Port Moresby
Characterized by the Af Köppen climate classification, Port Moresby lies in Tropical rainforest zone. This city, located in Papua New Guinea, experiences high temperatures and consistent rainfall throughout the year.
The annual temperature fluctuates mildy, with monthly averages ranging from a high of 30.2°C (86.4°F) to a low of 24.4°C (75.9°F). Humidity levels also remain relatively steady throughout the year, varying minimally between 73% and 80%.
Rainfall, while a consistent feature of the local landscape, varies notably throughout the year. Heavier rainfall occurs during the early months with 203mm (7.99") recorded in March, slowly decreasing over subsequent months and reaching its dominant low-point in July at 46mm (1.81") before gradually rising again.
Wind speeds also exhibit a noticeable pattern, with wind speeds rising from 11.6km/h (7.2mph) in January to 18.9km/h (11.7mph) in July and then gradually decreasing towards year-end. Unusual weather conditions include the significant jump in wind speed from, 10.4km/h (6.5mph) in April to 14.5km/h (9mph) in May, a spectacular increase in just one month.
The annual temperature fluctuates mildy, with monthly averages ranging from a high of 30.2°C (86.4°F) to a low of 24.4°C (75.9°F). Humidity levels also remain relatively steady throughout the year, varying minimally between 73% and 80%.
Rainfall, while a consistent feature of the local landscape, varies notably throughout the year. Heavier rainfall occurs during the early months with 203mm (7.99") recorded in March, slowly decreasing over subsequent months and reaching its dominant low-point in July at 46mm (1.81") before gradually rising again.
Wind speeds also exhibit a noticeable pattern, with wind speeds rising from 11.6km/h (7.2mph) in January to 18.9km/h (11.7mph) in July and then gradually decreasing towards year-end. Unusual weather conditions include the significant jump in wind speed from, 10.4km/h (6.5mph) in April to 14.5km/h (9mph) in May, a spectacular increase in just one month.
The best time to visit Port Moresby
Towards the end of the year, from September to November, Port Moresby depicts optimal conditions for a visit. During this period, rainfall decreases to moderately lower levels, falling between 82mm (3.23") and 88mm (3.46"). Furthermore, the city experiences higher sunshine hours, approximately from 10.9 hours to 11.3 hours per day, allowing visitors to fully take advantage of the daylight. Temperatures remain balmy, averaging around 27°C (80.6°F) to 30°C (86°F), providing a pleasant warmth without being intolerably hot.
The worst time to visit Port Moresby
The early months of the year, specifically January to March, might prove to be challenging for potential visitors. This period coincides with the highest rainfall of about 125mm (4.92") to 203mm (7.99"), over approximately 21 to 25 days each month. Besides, the temperatures during these months range between a sweltering 29.3°C (84.7°F) to 29.8°C (85.6°F). For visitors not accustomed to this combination of high temperature and significant rainfall, exploring the city might prove to be less comfortable.
Spring weather in Port Moresby
In Port Moresby, the spring months of March to May are categorized by a significant decrease in rainfall alongside temperature and humidity. Rainfall decreased from 203mm (7.99") in March to 80mm (3.15") in May. Concurrently, average high temperature dips slightly from 29.3°C (84.7°F) in March to 28°C (82.4°F) in May. Additionally, relative humidity also experiences slight reduction from 77% in March to 80% in May.
Summer weather in Port Moresby
Characterized by decreased rainfall and a noticeable rise in wind speed, the summer months of June to August in Port Moresby offer an interesting weather dynamic. Average rainfall drops from 110mm (4.33") in June to a minimal 46mm (1.81") in July, and then slightly increases to 71mm (2.8") in August. Simultaneously, the wind speed intensifies reaching from 14.5km/h (9mph) in June to 18.9km/h (11.7mph) in July before cooling off slightly to 17.8km/h (11.1mph) in August.
Autumn weather in Port Moresby
During the autumn period of September to November, Port Moresby experiences gradual rainfall increases and declining wind speeds. Rainfall intensifies steadily, from 82mm (3.23") in September up to 110mm (4.33") in November. Wind speeds, on the other hand, noticeably decline from 17.2km/h (10.7mph) in September to 11.9km/h (7.4mph) in November, leading to calmer weather conditions.
Winter weather in Port Moresby
Winter in Port Moresby, from December to February, plays host to variable weather conditions. Average temperatures remain high, between about 24.5°C (76.1°F) to 30.2°C (86.4°F). Rainfall significantly increases from 106mm (4.17") in December to 156mm (6.14") in January, followed by a slight dip to 125mm (4.92") in February. Wind speeds also decrease during these months from 9.7km/h (6mph) to 11.7km/h (7.3mph), contributing to the overall humid and wet winter climate.
Weather in January
The commencement of the year in Port Moresby, Papua New Guinea, witnesses a tropical monsoon climate. The rainfall reaches 156mm (6.14"), an indication that January experiences hefty precipitation. Amidst this, residents enjoy sunlight for almost nine hours per day, the high temperature sitting comfortably around the late 20s°C. Weather in January »
Weather in February
Switching over to February, Port Moresby continues to embrace the monsoon climate as showers persist, although they slightly decrease from January. Despite the city experiencing nearly equivalent high and low temperatures with the previous month, the sea slightly cools down to 29.4°C (84.9°F). Weather in February »
Weather in March
March, the first month of the autumn in Port Moresby, is also a moderately hot month, with an average temperature varying between 24.3°C (75.7°F) and 29.3°C (84.7°F). Port Moresby, Papua New Guinea, experiences an average high-temperature of a still moderately hot 29.3°C (84.7°F) in March, subtly different from February's 29.6°C (85.3°F). Weather in March »
Weather in April
Heading into April, the rainfall volume dramatically reduces to 134mm (5.28") from the previous month. The city starts to experience lower high temperatures, down to a pleasant 29.1°C (84.4°F). Consequently, activities that require cooler conditions may thrive better. Weather in April »
Weather in May
By May, the rainy season in Port Moresby gradually recedes, paving the way for brighter days. May ushers in a new phase as rainfall drops to 110mm (4.33"), a significant decrease from the preceding months. Coinciding with this, the city experiences less humidity, a welcome relief from the humidity-laden earlier months. Weather in May »
Weather in June
June brings along milder weather conditions typified by minimal rainfall, with a substantial decrease to 80mm (3.15") compared to the last month. The daily sunshine hours begin to increase, bringing about more daylight hours. The sea temperature takes a dip, making water activities less alluring. Weather in June »
Weather in July
The adventure into July facilitates a dry spell as Port Moresby experiences the least rainfall throughout the year, a meager 46mm (1.81"). July transforms into the driest month, providing an excellent opportunity for outdoor exploration without worries about sudden showers. Weather in July »
Weather in August
Come August, the dry spell continues with a slight increment in rainfall to 71mm (2.8"). While the weather remains relatively identical to the prior month, the sea temperature hits an annual low of 25.6°C (78.1°F). The average daily sunshine hours and daylight duration suggest a continuity of more extended outdoor activities. Weather in August »
Weather in September
Switching to September, Port Moresby begins to welcome the early signs of the monsoon season. The rainfall begins to increase again, reaching 82mm (3.23"), signifying the transition towards the rainy season. The city experiences consistency in terms of temperature, both terrestrial and marine, setting a steady pace into the final quarter of the year. Weather in September »
Weather in October
October in Port Moresby signifies a noticeable return to the wet season as rainfall volume increases to 110mm (4.33") from the previous month. The temperatures on land and at sea converge towards their annual averages, indicating a move back to the familiar monsoon weather pattern. Weather in October »
Weather in November
Come November, constants define the narrative of this period in Port Moresby. Similarly, rain and humidity levels continue to rise, and the city immerses itself entirely in the monsoon season. With temperatures mounting back to the high 20s°C and the sea temperature rising to 27.9°C (82.2°F), November reveals a typical tropical tableau. Weather in November »
Weather in December
Rounding off the year, December in Port Moresby depicts a classic tropical picture. With temperatures climbing to their annual peak, the city reaches a maximum of 30.2°C (86.4°F) and records an annual high sea temperature of 29.3°C (84.7°F). Weather in December »
[Resources]Frequently asked questions
What are the least humid months in Port Moresby?
January and February, with an average relative humidity of 73%, are the least humid months in Port Moresby, Papua New Guinea.
How many days does it rain in Port Moresby?
Throughout the year, there are 249.8 rainfall days, and 1311mm (51.61") of precipitation is accumulated.
What is the month with the warmest sea water in Port Moresby?
January is the month with the warmest seawater in Port Moresby, with an average sea temperature of 29.7°C (85.5°F).
When is the highest UV index in Port Moresby?
January, March through May, October through December, with an average maximum UV index of 7, are months with the highest UV index in Port Moresby.
What are the months with the lowest UV index in Port Moresby?
February, June through September, with an average maximum UV index of 6, are months with the lowest UV index.
What is the wettest month in Port Moresby?
The month with the most rainfall in Port Moresby is March, when the rain falls for 24.6 days and typically aggregates up to 203mm (7.99") of precipitation.
What is the most humid month in Port Moresby?
May and June, with an average relative humidity of 80%, are most humid months.
What is the month with the least sunshine in Port Moresby?
With an average of 7.1h of sunshine, May has the least sunshine of the year in Port Moresby, Papua New Guinea.
What is the month with the shortest days in Port Moresby?
With an average of 11h and 36min of daylight, June has the shortest days of the year in Port Moresby.
What are the coldest months in Port Moresby?
Port Moresby's average lowest temperatures are recorded in July and August, reaching a high of 27.6°C (81.7°F).
What is the driest month in Port Moresby?
July is the month with the least rainfall. Rain falls for 14.7 days and accumulates 46mm (1.81") of precipitation.
When is the sea coldest in Port Moresby?
The month with the coldest seawater is August, with an average sea temperature of 25.6°C (78.1°F).
What month has the most sunshine in Port Moresby?
November has the most sunshine of the year in Port Moresby, Papua New Guinea, with an average of 11.3h of sunshine.
What time of the year is the hottest in Port Moresby?
Port Moresby's warmest month, December, registers temperatures that range from a high of 30.2°C (86.4°F) to a low of 24.5°C (76.1°F).
When are the longest days in Port Moresby?
With an average of 12h and 42min of daylight, December has the longest days of the year.
Is there Daylight Saving Time (DST) in Port Moresby?
Port Moresby, Papua New Guinea, does not observe Daylight Saving Time (DST). +10 timezone is used over the entire year.
Average temperature
Port Moresby, Papua New Guinea
The warmest month (with the highest average high temperature) is December (30.2°C).
The months with the lowest average high temperature are July and August (27.6°C).
The month with the highest average low temperature is December (24.5°C).
The coldest month (with the lowest average low temperature) is August (22.5°C).
Average pressure
Port Moresby, Papua New Guinea
- Average pressure in January:
1007.9mbar - Average pressure in February:
1008.5mbar - Average pressure in March:
1008.8mbar - Average pressure in April:
1009.7mbar - Average pressure in May:
1010.5mbar - Average pressure in June:
1011.1mbar
- Average pressure in July:
1011.6mbar - Average pressure in August:
1012.1mbar - Average pressure in September:
1011.6mbar - Average pressure in October:
1010.8mbar - Average pressure in November:
1009.2mbar - Average pressure in December:
1008.1mbar
The month with the highest atmospheric pressure is August (1012.1mbar).
The month with the lowest atmospheric pressure is January (1007.9mbar).
Average wind speed
Port Moresby, Papua New Guinea
- Average wind speed in January:
11.6km/h - Average wind speed in February:
11.7km/h - Average wind speed in March:
10.4km/h - Average wind speed in April:
10.4km/h - Average wind speed in May:
14.5km/h - Average wind speed in June:
17.2km/h
- Average wind speed in July:
18.9km/h - Average wind speed in August:
17.8km/h - Average wind speed in September:
17.2km/h - Average wind speed in October:
14.6km/h - Average wind speed in November:
11.9km/h - Average wind speed in December:
9.7km/h
The windiest month (with the highest average wind speed) is July (18.9km/h).
The calmest month (with the lowest average wind speed) is December (9.7km/h).
Average humidity
Port Moresby, Papua New Guinea
The months with the highest relative humidity are May and June (80%).
The months with the lowest relative humidity are January and February (73%).
Average rainfall
Port Moresby, Papua New Guinea
- Average rainfall in January:
156mm - Average rainfall in February:
125mm - Average rainfall in March:
203mm - Average rainfall in April:
134mm - Average rainfall in May:
110mm - Average rainfall in June:
80mm
The wettest month (with the highest rainfall) is March (203mm).
The driest month (with the least rainfall) is July (46mm).
Average rainfall days
Port Moresby, Papua New Guinea
- Average rainfall days in January:
23.4 days - Average rainfall days in February:
21.2 days - Average rainfall days in March:
24.6 days - Average rainfall days in April:
24.2 days - Average rainfall days in May:
22.3 days - Average rainfall days in June:
19.6 days
- Average rainfall days in July:
14.7 days - Average rainfall days in August:
17.1 days - Average rainfall days in September:
20 days - Average rainfall days in October:
20.4 days - Average rainfall days in November:
20 days - Average rainfall days in December:
22.3 days
The month with the highest number of rainy days is March (24.6 days).
The month with the least rainy days is July (14.7 days).
Average sea temperature
Port Moresby, Papua New Guinea
The best month for swimming (with the highest average sea temperature) is January (29.7°C).
The coldest month (with the lowest average sea temperature) is August (25.6°C).
Average daylight / Average sunshine
Port Moresby, Papua New Guinea
- Average daylight in January:
12h and 4min - Average daylight in February:
12h and 2min - Average daylight in March:
12h and 1min - Average daylight in April:
11h and 5min - Average daylight in May:
11h and 4min - Average daylight in June:
11h and 4min
- Average daylight in July:
11h and 4min - Average daylight in August:
11h and 5min - Average daylight in September:
12h and 1min - Average daylight in October:
12h and 2min - Average daylight in November:
12h and 3min - Average daylight in December:
12h and 4min
The month with the longest days is December (Average daylight: 12h and 42min).
The month with the shortest days is June (Average daylight: 11h and 36min).
- Average sunshine in January:
8h and 5min - Average sunshine in February:
8h and 1min - Average sunshine in March:
8h and 1min - Average sunshine in April:
8h and 4min - Average sunshine in May:
7h and 1min - Average sunshine in June:
7h and 2min
- Average sunshine in July:
8h and 5min - Average sunshine in August:
8h and 2min - Average sunshine in September:
9h and 2min - Average sunshine in October:
10h and 5min - Average sunshine in November:
11h and 2min - Average sunshine in December:
10h and 5min
The month with the most sunshine is November (Average sunshine: 11h and 18min).
The month with the least sunshine is May (Average sunshine: 7h and 6min).
Average sunshine days
Port Moresby, Papua New Guinea
- Average sunshine days in January:
5.7 days - Average sunshine days in February:
5.5 days - Average sunshine days in March:
5.2 days - Average sunshine days in April:
5.2 days - Average sunshine days in May:
6.8 days - Average sunshine days in June:
8.9 days
- Average sunshine days in July:
13.4 days - Average sunshine days in August:
11.7 days - Average sunshine days in September:
7.9 days - Average sunshine days in October:
8.7 days - Average sunshine days in November:
8.5 days - Average sunshine days in December:
7.4 days
The month with the most sunshine days is July (13.4 days).
The months with the least sunshine days are March and April (5.2 days).
Average UV index
Port Moresby, Papua New Guinea
The months with the highest UV index are January, March, April, May, October, November and December (UV index 7).
The months with the lowest UV index are February, June, July, August and September (UV index 6).
Average cloud cover
Port Moresby, Papua New Guinea
The month with the most cloud cover is March (Cloud cover 41).
The month with the least cloud cover is November (Cloud cover 28).
Average visibility
Port Moresby, Papua New Guinea
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
Port Moresby, Papua New Guinea
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