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Jember, Indonesia climate
Aw Tropical savanna (dry winter)
Jember has a remarkably steady tropical climate (Tropical savanna (dry winter), Köppen Aw). The hottest month is November with an average daily high near 34°C, while the coldest is August averaging around 22°C at night. Precipitation totals about 1430 mm a year and is strongly seasonal — February alone averages 308 mm while August barely receives 1 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)Jember climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 32 | 32 | 32 | 32 | 32 | 32 | 31 | 31 | 33 | 34 | 34 | 33 |
| Avg temp (°C) | 28 | 28 | 28 | 28 | 28 | 28 | 27 | 27 | 28 | 29 | 29 | 29 |
| Avg low (°C) | 24 | 24 | 24 | 25 | 24 | 24 | 23 | 22 | 23 | 24 | 25 | 24 |
| Precipitation (mm) | 295 | 308 | 229 | 135 | 72 | 48 | 20 | 1 | 3 | 37 | 90 | 191 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 32 | 32 | 32 | 32 | 32 | 32 |
| Avg temp (°C) | 28 | 28 | 28 | 28 | 28 | 28 |
| Avg low (°C) | 24 | 24 | 24 | 25 | 24 | 24 |
| Precipitation (mm) | 295 | 308 | 229 | 135 | 72 | 48 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 31 | 31 | 33 | 34 | 34 | 33 |
| Avg temp (°C) | 27 | 27 | 28 | 29 | 29 | 29 |
| Avg low (°C) | 23 | 22 | 23 | 24 | 25 | 24 |
| Precipitation (mm) | 20 | 1 | 3 | 37 | 90 | 191 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 86 | 86 | 79 | 72 | 55 | 49 | 43 | 38 | 38 | 56 | 75 | 86 |
| Relative humidity (%) | 88 | 89 | 88 | 86 | 84 | 80 | 72 | 64 | 58 | 60 | 71 | 83 |
| Wind speed (km/h) | 6.1 | 6.1 | 4.8 | 4.6 | 5.3 | 5.9 | 6.8 | 7.5 | 7.7 | 6.7 | 5.1 | 5.3 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 86 | 86 | 79 | 72 | 55 | 49 |
| Relative humidity (%) | 88 | 89 | 88 | 86 | 84 | 80 |
| Wind speed (km/h) | 6.1 | 6.1 | 4.8 | 4.6 | 5.3 | 5.9 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 43 | 38 | 38 | 56 | 75 | 86 |
| Relative humidity (%) | 72 | 64 | 58 | 60 | 71 | 83 |
| Wind speed (km/h) | 6.8 | 7.5 | 7.7 | 6.7 | 5.1 | 5.3 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 29 years of daily observations at Surabaya Juanda, a weather station, about 134 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.