Jember climate — normals and trends
Jember (Indonesia) has a tropical monsoon climate (Am) under the Köppen-Geiger classification. Its mean annual temperature is 23.3 °C and it receives 2,156 mm of precipitation per year.
These figures are normals computed over 86 complete calendar years, from 1940 to 2025, using ERA5 reanalysis data from the Copernicus programme.
The warmest month is March (24.0 °C on average) and the coldest is August (21.9 °C). Rainfall peaks in January.
Jember averages 0 frost days, 18 hot days (≥ 30 °C) and 240 rainy days per year.
Jember has warmed by +1.7 °C between 1940 and 2025, or +0.20 °C per decade. This trend is statistically significant.
The hottest day of the period reached 32.6 °C (on 26 November 1982) and the coldest 12.4 °C (on 9 October 1997).
Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.
Climate normals · ERA5
JemberEast Java
- coords
- -8.17°, 113.70°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
23.3°C
Average daily high
27.7°C
Average daily low
20.1°C
Annual rainfall
2,156mm
Sunshine / day
9.9h
Mean relative humidity
86%
Average peak wind
9.5km/h
Seasonal range
2.1°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
18 d/yr
Rainy days (≥ 1 mm)
240 d/yr
Annual snowfall
0.0 cm
Average feels-like high
32.5 °C
Average feels-like low
23.1 °C
Average peak gust
29.3 km/h
Tropical nights (≥ 20 °C)
228 d/yr
Solar radiation
18.4 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.7 °C
since 1940
+0.2 °C per decade · r² = 0.79 · p = < 0.001
Trend fitted by linear regression (ordinary least squares) on annual means. A trend is shown only when it is statistically significant (p < 0.05).
A climograph overlays rainfall (bars) and temperature (line): the standard reading in climatology, where you can see at a glance whether the warm season is also the dry one.
Records for the period
Hottest day
32.6 °C
26 November 1982
Coldest day
12.4 °C
9 October 1997
Wettest day
187 mm
23 November 1988
Windiest day
23.3 km/h
14 December 1950
Strongest gust
60.1 km/h
13 February 2001
Hottest feels-like
40.3 °C
25 March 2006
Coldest feels-like
10.7 °C
9 October 1997
Sunniest day
12.5 h
19 December 1940
Normals computed over complete calendar years 1940–2025.
A specific year
Pick a year and see how it compares to normal — warmer, drier or more extreme than usual?
Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 28.4 °C | +0.7 °C | 397 mm | +72 mm |
| Feb | 29.3 °C | +1.4 °C | 271 mm | -44 mm |
| Mar | 28.9 °C | +0.8 °C | 309 mm | +13 mm |
| Apr | 28.9 °C | +0.5 °C | 121 mm | -60 mm |
| May | 28.6 °C | +0.6 °C | 354 mm | +221 mm |
| Jun | 27.8 °C | +0.5 °C | 55 mm | -24 mm |
| Jul | 26.3 °C | -0.3 °C | 65 mm | +14 mm |
| Aug | 27.3 °C | +0.5 °C | 67 mm | +28 mm |
| Sep | 27.5 °C | 0.0 °C | 165 mm | +102 mm |
| Oct | 28.5 °C | +0.2 °C | 258 mm | +131 mm |
| Nov | 28.2 °C | 0.0 °C | 398 mm | +154 mm |
| Dec | 28.7 °C | +0.9 °C | 261 mm | -43 mm |
The year's extremes
What was the weather like that day?
Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.
Frequently asked questions
What is the climate of Jember?
Jember has a tropical monsoon climate (Köppen Am). Over 1940-2025, the average annual temperature is 23.3 °C and it receives 2,156 mm of precipitation per year.
What is the hottest day ever recorded in Jember?
The hottest day measured in Jember between 1940 and 2025 was 26 November 1982, reaching 32.6 °C.
What is the coldest day in Jember?
The coldest day measured in Jember between 1940 and 2025 was 9 October 1997, at 12.4 °C.
Does it snow in Jember?
Almost never: Jember sees virtually no snow, with about 0 frost days per year.
Has the climate of Jember warmed?
Yes: Jember warmed by +1.7 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Jember?
The wettest day measured in Jember between 1940 and 2025 was 23 November 1988, with 187 mm of rain in 24 hours.
What was the windiest day in Jember?
The windiest day measured in Jember between 1940 and 2025 was 14 December 1950, with winds reaching 23.3 km/h.
What is the warmest month in Jember?
The warmest month in Jember is March (24.0 °C on average); the coldest is August (21.9 °C).
How much does it rain in Jember?
Jember receives on average 2,156 mm of precipitation per year, spread over about 240 rainy days.
Is it sunny in Jember?
Jember gets on average 9.9 hours of sunshine per day, roughly 3,614 hours per year over 1940-2025.
Are there tropical nights in Jember?
Yes: Jember has on average 228 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Jember?
In Jember, between 1940 and 2025, the highest apparent temperature reached 40.3 °C on 25 March 2006, and the lowest was 10.7 °C on 9 October 1997.
Compare Jember with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Jember