Semarang climate — normals and trends
Semarang (Indonesia) has a tropical monsoon climate (Am) under the Köppen-Geiger classification. Its mean annual temperature is 26.5 °C and it receives 2,263 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 October (27.7 °C on average) and the coldest is January (25.5 °C). Rainfall peaks in December.
Semarang averages 0 frost days, 262 hot days (≥ 30 °C) and 229 rainy days per year.
Semarang has warmed by +1.8 °C between 1940 and 2025, or +0.21 °C per decade. This trend is statistically significant.
The hottest day of the period reached 38.0 °C (on 25 October 1977) and the coldest 17.2 °C (on 9 June 1944).
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
SemarangCentral Java
- coords
- -6.99°, 110.42°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
26.5°C
Average daily high
31.1°C
Average daily low
23.1°C
Annual rainfall
2,263mm
Sunshine / day
10.2h
Mean relative humidity
79%
Average peak wind
10.4km/h
Seasonal range
2.2°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
262 d/yr
Rainy days (≥ 1 mm)
229 d/yr
Annual snowfall
0.0 cm
Average feels-like high
36.5 °C
Average feels-like low
26.9 °C
Average peak gust
27.8 km/h
Tropical nights (≥ 20 °C)
361 d/yr
Solar radiation
19.4 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.8 °C
since 1940
+0.2 °C per decade · r² = 0.69 · 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
38.0 °C
25 October 1977
Coldest day
17.2 °C
9 June 1944
Wettest day
243 mm
22 March 1994
Windiest day
34.7 km/h
25 January 2012
Strongest gust
73.8 km/h
25 January 2012
Hottest feels-like
43.2 °C
17 November 2018
Coldest feels-like
17.3 °C
2 July 1986
Sunniest day
12.4 h
21 December 2023
Normals computed over complete calendar years 1940–2025.
A specific year
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Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 30.0 °C | +1.0 °C | 504 mm | +145 mm |
| Feb | 30.1 °C | +1.1 °C | 253 mm | -84 mm |
| Mar | 30.4 °C | +0.5 °C | 355 mm | +37 mm |
| Apr | 30.9 °C | +0.1 °C | 186 mm | -15 mm |
| May | 31.1 °C | -0.1 °C | 308 mm | +193 mm |
| Jun | 31.2 °C | -0.3 °C | 92 mm | +28 mm |
| Jul | 31.9 °C | 0.0 °C | 25 mm | -16 mm |
| Aug | 31.4 °C | -1.2 °C | 156 mm | +126 mm |
| Sep | 32.2 °C | -1.0 °C | 101 mm | +48 mm |
| Oct | 32.8 °C | -0.3 °C | 207 mm | +75 mm |
| Nov | 30.7 °C | -0.8 °C | 411 mm | +162 mm |
| Dec | 30.6 °C | +0.6 °C | 406 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 Semarang?
Semarang has a tropical monsoon climate (Köppen Am). Over 1940-2025, the average annual temperature is 26.5 °C and it receives 2,263 mm of precipitation per year.
What is the hottest day ever recorded in Semarang?
The hottest day measured in Semarang between 1940 and 2025 was 25 October 1977, reaching 38.0 °C.
What is the coldest day in Semarang?
The coldest day measured in Semarang between 1940 and 2025 was 9 June 1944, at 17.2 °C.
Does it snow in Semarang?
Almost never: Semarang sees virtually no snow, with about 0 frost days per year.
Has the climate of Semarang warmed?
Yes: Semarang warmed by +1.8 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Semarang?
The wettest day measured in Semarang between 1940 and 2025 was 22 March 1994, with 243 mm of rain in 24 hours.
What was the windiest day in Semarang?
The windiest day measured in Semarang between 1940 and 2025 was 25 January 2012, with winds reaching 34.7 km/h.
What is the warmest month in Semarang?
The warmest month in Semarang is October (27.7 °C on average); the coldest is January (25.5 °C).
How much does it rain in Semarang?
Semarang receives on average 2,263 mm of precipitation per year, spread over about 229 rainy days.
Is it sunny in Semarang?
Semarang gets on average 10.2 hours of sunshine per day, roughly 3,723 hours per year over 1940-2025.
Are there tropical nights in Semarang?
Yes: Semarang has on average 361 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Semarang?
In Semarang, between 1940 and 2025, the highest apparent temperature reached 43.2 °C on 17 November 2018, and the lowest was 17.3 °C on 2 July 1986.
Compare Semarang with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Semarang