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Alotau, Papua New Guinea climate
Af Tropical rainforest
Alotau has a remarkably steady tropical climate (Tropical rainforest, Köppen Af). The hottest month is January with an average daily high near 29°C, while the coldest is August averaging around 24°C at night. Precipitation is fairly even year-round, totalling about 3009 mm.
Temperature & precipitation
Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figuresHours of sunshine per day
Estimated sunny hours each month — daylight length × clear-sky fraction · 1991–2020 monthly cloud cover (NASA POWER)Alotau climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 29 | 29 | 29 | 28 | 28 | 27 | 26 | 26 | 27 | 27 | 28 | 29 |
| Avg temp (°C) | 28 | 28 | 28 | 27 | 27 | 26 | 25 | 25 | 26 | 26 | 27 | 28 |
| Avg low (°C) | 27 | 27 | 27 | 27 | 26 | 25 | 25 | 24 | 25 | 26 | 26 | 27 |
| Precipitation (mm) | 311 | 300 | 308 | 285 | 268 | 260 | 198 | 198 | 209 | 224 | 203 | 245 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 29 | 29 | 29 | 28 | 28 | 27 |
| Avg temp (°C) | 28 | 28 | 28 | 27 | 27 | 26 |
| Avg low (°C) | 27 | 27 | 27 | 27 | 26 | 25 |
| Precipitation (mm) | 311 | 300 | 308 | 285 | 268 | 260 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 26 | 26 | 27 | 27 | 28 | 29 |
| Avg temp (°C) | 25 | 25 | 26 | 26 | 27 | 28 |
| Avg low (°C) | 25 | 24 | 25 | 26 | 26 | 27 |
| Precipitation (mm) | 198 | 198 | 209 | 224 | 203 | 245 |
How often — frequency of weather events
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Days with high ≥ 32°C (days) | — | — | 0.0 | — | — | — | — | — | — | — | — | — |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Days with high ≥ 32°C (days) | — | — | 0.0 | — | — | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Days with high ≥ 32°C (days) | — | — | — | — | — | — |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 74 | 75 | 75 | 70 | 70 | 71 | 74 | 69 | 67 | 63 | 59 | 63 |
| Relative humidity (%) | 79 | 80 | 81 | 82 | 84 | 84 | 83 | 83 | 82 | 82 | 80 | 79 |
| Wind speed (m/s) | 3.6 | 3.6 | 3.8 | 4.3 | 5.1 | 5.5 | 6.0 | 5.8 | 5.6 | 5.0 | 4.3 | 3.6 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 74 | 75 | 75 | 70 | 70 | 71 |
| Relative humidity (%) | 79 | 80 | 81 | 82 | 84 | 84 |
| Wind speed (m/s) | 3.6 | 3.6 | 3.8 | 4.3 | 5.1 | 5.5 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 74 | 69 | 67 | 63 | 59 | 63 |
| Relative humidity (%) | 83 | 83 | 82 | 82 | 80 | 79 |
| Wind speed (m/s) | 6.0 | 5.8 | 5.6 | 5.0 | 4.3 | 3.6 |
Methodology & sources
Temperature & precipitation — modelled for this location from ERA5-Land reanalysis, a ~9 km global grid, because no long-record weather station is close enough to use.
Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.