Biak, Indonesia Climate
The warmest month is October, with an average high of 29°C; the coldest is July, with an average low of 27°C. A normal year brings 2882 mm of precipitation.
Temperature through the year
The normal daily high and low and the record for every date at Biak/Frans Kaisiepo, since 1944. The line marks today.
- Normal low
- Normal high
- Record high
- Record low
Normals for Oct 5
- Normal high
- 29°C
- Normal low
- 27°C
- Record high
- 33°Cin 2007
- Record low
- 23°Cin 1986
- Chance of a wet day
- 80%
- Daylight
- 12 h 07 min
Month by month
Averages for 1991-2020. Wet days have at least 1 mm of precipitation in the reanalysis. Each month links to its own page.
| Month | Avg high | Avg low | Record high | Record low | Precipitation | Wet days |
|---|---|---|---|---|---|---|
| January | 28°C | 27°C | 37°C (1991) | 21°C (2008) | 260 mm | 27.9 |
| February | 28°C | 27°C | 36°C (2000) | 21°C (1958) | 215 mm | 25.4 |
| March | 28°C | 27°C | 33°C (2018) | 20°C (2006) | 276 mm | 27.9 |
| April | 28°C | 27°C | 33°C (2008) | 20°C (1995) | 243 mm | 27.0 |
| May | 29°C | 28°C | 33°C (1980) | 20°C (1999) | 220 mm | 27.9 |
| June | 28°C | 27°C | 33°C (1995) | 20°C (1980) | 273 mm | 27.0 |
| July | 28°C | 27°C | 33°C (1980) | 19°C (1980) | 264 mm | 27.9 |
| August | 28°C | 27°C | 34°C (1980) | 20°C (1979) | 233 mm | 24.8 |
| September | 28°C | 27°C | 34°C (1992) | 20°C (1979) | 210 mm | 27.0 |
| October | 29°C | 27°C | 34°C (1996) | 22°C (1996) | 205 mm | 24.8 |
| November | 29°C | 28°C | 34°C (1979) | 20°C (1984) | 207 mm | 27.0 |
| December | 28°C | 27°C | 33°C (1986) | 20°C (1980) | 276 mm | 27.9 |
| Year | 28°C | 27°C | 2882 mm | 323 |
Precipitation
Rain and melted snow together. The chance of a wet day is the share of days with at least 1 mm of precipitation in the reanalysis.
2882 mm in a normal year, most in March.
Chance of a wet day
- Chance of a wet day
Humidity and comfort
NASA POWER reanalysis, 1991-2020, for the grid cell around Biak.
The muggiest month is January, when 100 percent of days are muggy or worse, with a mean dew point of 18°C or more.
| Month | Dew point | Humidity | Dry | Comfortable | Humid | Muggy | Oppressive | Miserable |
|---|---|---|---|---|---|---|---|---|
| January | 24°C | 82% | 0% | 0% | 0% | 0% | 20% | 80% |
| February | 24°C | 82% | 0% | 0% | 0% | 0% | 26% | 74% |
| March | 24°C | 83% | 0% | 0% | 0% | 0% | 21% | 79% |
| April | 25°C | 82% | 0% | 0% | 0% | 0% | 10% | 90% |
| May | 25°C | 82% | 0% | 0% | 0% | 0% | 10% | 90% |
| June | 24°C | 82% | 0% | 0% | 0% | 0% | 21% | 79% |
| July | 24°C | 82% | 0% | 0% | 0% | 0% | 43% | 57% |
| August | 24°C | 80% | 0% | 0% | 0% | 0% | 52% | 48% |
| September | 24°C | 80% | 0% | 0% | 0% | 0% | 47% | 53% |
| October | 24°C | 80% | 0% | 0% | 0% | 0% | 29% | 71% |
| November | 25°C | 81% | 0% | 0% | 0% | 0% | 13% | 87% |
| December | 25°C | 82% | 0% | 0% | 0% | 0% | 8% | 92% |
Comfort is judged by the day's mean dew point: dry below 13°C, comfortable to 16°C, humid to 18°C, muggy to 21°C, oppressive to 24°C, miserable above.
Clouds
Average share of the sky covered, from satellite (CERES and GEWEX SRB) by way of NASA POWER, 1991-2020.
The clearest month is May, with the sky 69 percent covered on average; the cloudiest is February, at 82 percent.
Wind
The mean wind speed over the whole day, from the MERRA-2 reanalysis by way of NASA POWER. Gusts run well above it.
The windiest month is March, averaging 14.0 km/h at 10 meters (33 feet) above the ground.
Daylight and sunshine
The longest day is Jan 1, with 12 h 12 min of daylight; the shortest is May 22, with 12 h 03 min.
- Day length
Solar energy
Average daily sunshine reaching the ground on a flat surface, in kilowatt-hours per square meter, clouds included.
Month pages
The weather in Biak in each month, day by day.
What this means
A normal is the average of the thirty years 1991 to 2020, the period the World Meteorological Organization and NOAA use for comparison. It is an average, not a forecast: most days depart from it, and some by a long way.
A record is the highest or lowest value on the date in every year the station has reported, back to 1944. It rests on one station, so a neighbor a few miles away can hold different ones.
Cloud, humidity, wind and sunshine come from a reanalysis: a weather model run over the past with every observation fed in, averaged over a grid cell about 50 km across. It is consistent everywhere on Earth; it smooths local detail such as a lake shore or a valley.
More for this place
Sources
Records: NOAA GHCN-Daily, station ID000097560, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine, and temperature and precipitation: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.