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Contents
- The climate of Alotau
- The best time to visit Alotau
- The worst time to visit Alotau
- Spring weather in Alotau
- Summer weather in Alotau
- Autumn weather in Alotau
- Winter weather in Alotau
- 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 climate of Alotau
Characterized by the Köppen climate classification as Af, Alotau, Papua New Guinea boasts a tropical rainforest climate. This classification and the geographical position of the city on the eastern coast of Papua New Guinea ensure relatively consistent weather throughout the year, with significant rainfall and high humidity levels.
Temperature variations are minimal, registering highs ranging from 25.9°C (78.6°F) to 29.5°C (85.1°F) and lows from 23.3°C (73.9°F) to 25.6°C (78.1°F) on an annual scale. Humidity stays high, circulating between 77 and 84%, inherent to the tropics. Evidently, there is no significant decline or rise in temperatures, which establishes a muggy and warm climate for most of the year.
Rainfall is another significant feature of Alotau's climate, with an average rainfall height fluctuating from 66mm (2.6") to 163mm (6.42") per month. There is no complete cessation of rain throughout the year, with the number of rainfall days varying from 15.4 to 23.1 days per month. Hence, Alotau experiences a wet climate, receiving consistent rainfall almost throughout the year.
Furthermore, wind patterns reveal a progressively increasing trend from 6.7km/h (4.2mph) to 13.6km/h (8.5mph) and then moderately decreasing towards the end of the year. Gusts show a similar pattern, with a minimum of 10km/h (6.2mph) rising towards the end of the year with a maximum of 19.7km/h (12.2mph). This indicates a slightly windy climate, more intense towards the latter half of the year.
Temperature variations are minimal, registering highs ranging from 25.9°C (78.6°F) to 29.5°C (85.1°F) and lows from 23.3°C (73.9°F) to 25.6°C (78.1°F) on an annual scale. Humidity stays high, circulating between 77 and 84%, inherent to the tropics. Evidently, there is no significant decline or rise in temperatures, which establishes a muggy and warm climate for most of the year.
Rainfall is another significant feature of Alotau's climate, with an average rainfall height fluctuating from 66mm (2.6") to 163mm (6.42") per month. There is no complete cessation of rain throughout the year, with the number of rainfall days varying from 15.4 to 23.1 days per month. Hence, Alotau experiences a wet climate, receiving consistent rainfall almost throughout the year.
Furthermore, wind patterns reveal a progressively increasing trend from 6.7km/h (4.2mph) to 13.6km/h (8.5mph) and then moderately decreasing towards the end of the year. Gusts show a similar pattern, with a minimum of 10km/h (6.2mph) rising towards the end of the year with a maximum of 19.7km/h (12.2mph). This indicates a slightly windy climate, more intense towards the latter half of the year.
The best time to visit Alotau
Notably, the best time to visit Alotau is during the months when the rainfall is comparatively low, and sunshine hours peak. This phase starts from August and lasts through October. During these months, the rainfall decreases from 87mm (3.43") to the annual minimum of 66mm (2.6"), and the number of sunny days increases to 10.5 to 10.3, providing extended daylight enjoyment for visitors. Simultaneously, the temperature remains relatively warm, with highs averaging more than 26°C (78.8°F). These conditions make it an ideal time to explore the outdoor activities and sightseeing Alotau offers.
The worst time to visit Alotau
Taking into account the rainfall and sunshine, March tends to be the most challenging month for visitors. It receives the maximum annual rainfall of 163mm (6.42"), with 21.3 days of rain, which might hinder outdoor plans. Furthermore, it sees the year's lowest hours of sunshine, clocking in at six hours in a day, reducing daylight enjoyment.
Spring weather in Alotau
Marked by rising temperatures and a moderate level of rainfall, the spring in Alotau, from March to May, offers delightful weather. The daylight lasts for approximately 11.9 to 11.6 hours per day, providing ample opportunities for daylight expedition. Simultaneously, the sea temperature remains about 29°C (84.2°F), suitable for water-centered activities.
Summer weather in Alotau
Presenting warm weather with high humidity, Alotau's summer extends from June to August. The temperature hovers from 25.9°C (78.6°F) to 26.5°C (79.7°F), creating a warm and pleasant atmosphere for the visitors. Rainfall drops to 87mm (3.43") in August, diminishing the rainy days to 15.4 days.
Autumn weather in Alotau
Autumn in Alotau, ranging from September to November, is showcased by consistent temperatures and lowered rainfall. Temperatures maintain a warm 26.5°C (79.7°F) to 28.2°C (82.8°F). Concurrently, rainfall goes down to 90mm (3.54") in November, with 18.6 rainy days.
Winter weather in Alotau
Alotau's winter, from December to February, experiences relatively high temperatures from 28.3°C (82.9°F) to 29.5°C (85.1°F). Rainfall is fairly high, within 100mm (3.94") to 132mm (5.2") range, with approximately 20 days of rainfall each month. However, the sea temperature remains inviting, holding steady at 29°C (84.2°F), making it pleasant for water activities.
Weather in January
Alotau in Papua New Guinea is truly a tropical paradise to kick start the year. January holds the promise of pleasant warmth with its high of 29.5°C (85.1°F) and a low of 25.5°C (77.9°F). The city embraces regular rainfall with intermittent sunshine hours. Weather in January »
Weather in February
Following January, February observes similar weather conditions with only a minor drop in temperature. Unchanged from January, the visibility remains at an optimal 10km (6.2mi). The days are slighty shorter, but still providing ample daylight. Weather in February »
Weather in March
As the third month rolls in, Alotau continues its tropical rhythm of warm temperatures and frequent rain. With total monthly rainfall reaching 163mm (6.42"), it is one of the high points in the year. The tidal waters start to warm up again near the end of the month as summer approaches. Weather in March »
Weather in April
April in Alotau witnesses subtle changes from March's weather pattern. The month records a decrease in the sea's temperature to 29°C (84.2°F). With reduced daylight hours, the city experiences slightly cooler evenings. Regular rainfall maintains the city's lush greenery and helps to moderate the temperature. Weather in April »
Weather in May
May tends to carry with it a slight drop in the temperature from the preceding month. Amidst a decline in daylight from 11.9 hours to 11.6 hours, the city ensures comfortable living conditions. Despite the increased relative humidity of 83%, the coastal breezes help maintain a comfortable atmosphere. Weather in May »
Weather in June
In June, the temperatures further drop along with the sea's temperature, reflecting the typical mid-year climate. With a peak wind speed at 13.6km/h (8.5mph), the city experiences the most substantial winds of the year. The decrease in temperature and increased wind speeds create a refreshing ambiance. Weather in June »
Weather in July
As Alotau enters into July, there's a noticeable drop in temperature creating comfortable conditions. The daylight starts increasing from 11.6 hours to 11.8 hours compared to June. There's a slight drop in the wind speed but still breezy enough to generate a refreshing atmosphere. Weather in July »
Weather in August
In August, Alotau gives a comfortable break from the excessive rainfall typical of the earlier months. With rainfall dipping to a low of 70mm (2.76"), it is the driest month of the year. Higher daylight of 11.8 hours contributes to more sunshine hours and less cloud cover. Weather in August »
Weather in September
September in Alotau continues the respite from intense rainfall experienced in August. Reaching up to 7.5 sunshine hours, it marks the onset of brighter days. The temperatures maintain their typical range, contributing to the ongoing pleasant climatic conditions. Weather in September »
Weather in October
October observes an increased rainfall of 112mm (4.41"), yet it remains below the year's highs. With the sunlight peaking at 8.2 hours, it marks the increase in sunshine days. October dawns with increased daylight hours promising a balance between rain and shine. Weather in October »
Weather in November
November witnesses a surge in temperatures, indicating the arrival of late summer. In comparison to October, November presents more sunshine hours extending to 9.7 hours. The warmth of the sea and land encourages tourists and locals to indulge in various water sports. Weather in November »
Weather in December
Closing the year, December carries forward the weather trends noticed in November. The sea temperature again reaches its peak for the year at 29°C (84.2°F). As daylight continues to be generous, the city enjoys its sunny days complemented by cool breezes. Weather in December »
[Resources]Frequently asked questions
What time of the year is the hottest in Alotau?
The warmest time of the year in Alotau, Papua New Guinea, is January, with temperatures averaging a high of 29.5°C (85.1°F) and a low of 25.5°C (77.9°F).
How much does it rain in Alotau?
Throughout the year, there are 235.8 rainfall days, and 1249mm (49.17") of precipitation is accumulated.
What months are the sea warmest in Alotau?
January through April and December, with an average sea temperature of 29°C (84.2°F), are months with the warmest seawater.
What is the month with the highest UV index in Alotau?
The months with the highest UV index in Alotau are January through April, October through December, with an average maximum UV index of 7.
What is the least humid month in Alotau?
The least humid month in Alotau is February, with an average relative humidity of 77%.
What is the rainiest month in Alotau?
March is the month with the most rainfall. Rain falls for 21.3 days and accumulates 163mm (6.42") of precipitation.
What are the months with the lowest UV index in Alotau?
The months with the lowest UV index are May through September, with an average maximum UV index of 6.
What is the most humid month in Alotau?
With an average relative humidity of 84%, June is the most humid month in Alotau, Papua New Guinea.
What is the month with the shortest days in Alotau?
June has the shortest days of the year in Alotau, with an average of 11h and 30min of daylight.
What month is the coldest in Alotau?
Temperature readings in Alotau reach their annual highs in July, averaging 25.9°C (78.6°F) and a minimum average of 23.3°C (73.9°F).
What are the months with the coldest sea water in Alotau?
The months with the coldest seawater are July through September, with an average sea temperature of 26°C (78.8°F).
What is the month with the least sunshine in Alotau?
With an average of 5.5h of sunshine, July has the least sunshine of the year.
What is the driest month in Alotau?
The month with the least rainfall is September, when the rain falls for 16.5 days and typically collects 66mm (2.6") of precipitation.
When are the longest days in Alotau?
The month with the longest days is December, with an average of 12h and 42min of daylight.
Is there Daylight Saving Time (DST) in Alotau?
Alotau, Papua New Guinea, does not observe Daylight Saving Time (DST). +10 timezone is used over the entire year.
What month has the most sunshine in Alotau?
The month with the most sunshine is December, with an average of 10.8h of sunshine.
Average temperature
Alotau, Papua New Guinea
The warmest month (with the highest average high temperature) is January (29.5°C).
The month with the lowest average high temperature is July (25.9°C).
The month with the highest average low temperature is February (25.6°C).
The coldest months (with the lowest average low temperature) are July and August (23.3°C).
Average pressure
Alotau, Papua New Guinea
- Average pressure in January:
1007.2mbar - Average pressure in February:
1007.7mbar - Average pressure in March:
1008.2mbar - Average pressure in April:
1009.4mbar - Average pressure in May:
1010.5mbar - Average pressure in June:
1011.2mbar
- Average pressure in July:
1011.8mbar - Average pressure in August:
1012.1mbar - Average pressure in September:
1011.8mbar - Average pressure in October:
1010.9mbar - Average pressure in November:
1009.1mbar - Average pressure in December:
1007.7mbar
The month with the highest atmospheric pressure is August (1012.1mbar).
The month with the lowest atmospheric pressure is January (1007.2mbar).
Average wind speed
Alotau, Papua New Guinea
- Average wind speed in January:
7.3km/h - Average wind speed in February:
6.7km/h - Average wind speed in March:
7.5km/h - Average wind speed in April:
8.3km/h - Average wind speed in May:
10.5km/h - Average wind speed in June:
12km/h
- Average wind speed in July:
13.6km/h - Average wind speed in August:
12.7km/h - Average wind speed in September:
12.8km/h - Average wind speed in October:
10.9km/h - Average wind speed in November:
9.1km/h - Average wind speed in December:
7.6km/h
The windiest month (with the highest average wind speed) is July (13.6km/h).
The calmest month (with the lowest average wind speed) is February (6.7km/h).
Average humidity
Alotau, Papua New Guinea
The month with the highest relative humidity is June (84%).
The month with the lowest relative humidity is February (77%).
Average rainfall
Alotau, Papua New Guinea
- Average rainfall in January:
132mm - Average rainfall in February:
109mm - Average rainfall in March:
163mm - Average rainfall in April:
95mm - Average rainfall in May:
109mm - Average rainfall in June:
116mm
The wettest month (with the highest rainfall) is March (163mm).
The driest month (with the least rainfall) is September (66mm).
Average rainfall days
Alotau, Papua New Guinea
- Average rainfall days in January:
23.1 days - Average rainfall days in February:
19.4 days - Average rainfall days in March:
21.3 days - Average rainfall days in April:
20.8 days - Average rainfall days in May:
22.8 days - Average rainfall days in June:
21 days
- Average rainfall days in July:
19.3 days - Average rainfall days in August:
15.4 days - Average rainfall days in September:
16.5 days - Average rainfall days in October:
17.4 days - Average rainfall days in November:
18.6 days - Average rainfall days in December:
20.2 days
The month with the highest number of rainy days is January (23.1 days).
The month with the least rainy days is August (15.4 days).
Average sea temperature
Alotau, Papua New Guinea
The best months for swimming (with the highest average sea temperature) are January, February, March, April and December (29°C).
The coldest months (with the lowest average sea temperature) are July, August and September (26°C).
Average daylight / Average sunshine
Alotau, 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 3min
- Average daylight in July:
11h and 4min - Average daylight in August:
11h and 5min - Average daylight in September:
12h and 0min - Average daylight in October:
12h and 2min - Average daylight in November:
12h and 4min - 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 30min).
- Average sunshine in January:
10h and 0min - Average sunshine in February:
9h and 1min - Average sunshine in March:
8h and 0min - Average sunshine in April:
6h and 5min - Average sunshine in May:
6h and 0min - Average sunshine in June:
5h and 4min
- Average sunshine in July:
5h and 3min - Average sunshine in August:
5h and 5min - Average sunshine in September:
7h and 3min - Average sunshine in October:
8h and 1min - Average sunshine in November:
9h and 4min - Average sunshine in December:
10h and 5min
The month with the most sunshine is December (Average sunshine: 10h and 48min).
The month with the least sunshine is July (Average sunshine: 5h and 30min).
Average sunshine days
Alotau, Papua New Guinea
- Average sunshine days in January:
6.9 days - Average sunshine days in February:
7.4 days - Average sunshine days in March:
7.5 days - Average sunshine days in April:
7.3 days - Average sunshine days in May:
5.9 days - Average sunshine days in June:
6.4 days
- Average sunshine days in July:
6.7 days - Average sunshine days in August:
11.9 days - Average sunshine days in September:
10.5 days - Average sunshine days in October:
10.3 days - Average sunshine days in November:
10 days - Average sunshine days in December:
9.5 days
The month with the most sunshine days is August (11.9 days).
The month with the least sunshine days is May (5.9 days).
Average UV index
Alotau, Papua New Guinea
The months with the highest UV index are January, February, March, April, October, November and December (UV index 7).
The months with the lowest UV index are May, June, July, August and September (UV index 6).
Average cloud cover
Alotau, Papua New Guinea
The months with the most cloud cover are June and July (Cloud cover 48).
The month with the least cloud cover is December (Cloud cover 34).
Average visibility
Alotau, 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).
Alotau, Papua New Guinea
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