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Biak, Indonesia climate
Af Tropical rainforest
Biak has a remarkably steady tropical climate (Tropical rainforest, Köppen Af). The hottest month is May with an average daily high near 87°F, while the coldest is July averaging around 75°F at night. Around 59 inches of precipitation falls each year, peaking in February (7.2 inches) and easing off in November (3.5 inches).
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)Biak climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 87 | 86 | 86 | 87 | 87 | 86 | 86 | 86 | 86 | 87 | 87 | 87 |
| Avg temp (°F) | 81 | 81 | 81 | 81 | 81 | 81 | 81 | 81 | 81 | 81 | 81 | 81 |
| Avg low (°F) | 75 | 75 | 75 | 76 | 76 | 75 | 75 | 75 | 75 | 76 | 76 | 76 |
| Precipitation (in) | 5.9 | 7.2 | 5.6 | 4.8 | 3.9 | 4.2 | 4.7 | 4.5 | 4.2 | 4.7 | 3.5 | 6.0 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°F) | 87 | 86 | 86 | 87 | 87 | 86 |
| Avg temp (°F) | 81 | 81 | 81 | 81 | 81 | 81 |
| Avg low (°F) | 75 | 75 | 75 | 76 | 76 | 75 |
| Precipitation (in) | 5.9 | 7.2 | 5.6 | 4.8 | 3.9 | 4.2 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°F) | 86 | 86 | 86 | 87 | 87 | 87 |
| Avg temp (°F) | 81 | 81 | 81 | 81 | 81 | 81 |
| Avg low (°F) | 75 | 75 | 75 | 76 | 76 | 76 |
| Precipitation (in) | 4.7 | 4.5 | 4.2 | 4.7 | 3.5 | 6.0 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 83 | 85 | 84 | 80 | 71 | 76 | 75 | 74 | 74 | 76 | 79 | 82 |
| Relative humidity (%) | 82 | 82 | 83 | 82 | 82 | 82 | 81 | 80 | 80 | 80 | 81 | 82 |
| Wind speed (mph) | 7.3 | 7.6 | 7.6 | 6.9 | 6.6 | 6.2 | 6.3 | 6.2 | 6.0 | 6.2 | 6.8 | 7.1 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 83 | 85 | 84 | 80 | 71 | 76 |
| Relative humidity (%) | 82 | 82 | 83 | 82 | 82 | 82 |
| Wind speed (mph) | 7.3 | 7.6 | 7.6 | 6.9 | 6.6 | 6.2 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 75 | 74 | 74 | 76 | 79 | 82 |
| Relative humidity (%) | 81 | 80 | 80 | 80 | 81 | 82 |
| Wind speed (mph) | 6.3 | 6.2 | 6.0 | 6.2 | 6.8 | 7.1 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 24 years of daily observations at Frans Kaisiepo, a weather station, about 3 km from the city centre. The underlying daily records come from NOAA's global station network.
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.