Sibolga climate — normals and trends
Sibolga (Indonesia) has a tropical rainforest climate (Af) under the Köppen-Geiger classification. Its mean annual temperature is 25.1 °C and it receives 3,628 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 May (25.8 °C on average) and the coldest is October (24.7 °C). Rainfall peaks in November.
Sibolga averages 0 frost days, 10 hot days (≥ 30 °C) and 299 rainy days per year.
Sibolga 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 33.2 °C (on 11 March 2010) and the coldest 20.4 °C (on 19 January 1940).
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
SibolgaNorth Sumatra
- coords
- 1.74°, 98.78°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
25.1°C
Average daily high
27.7°C
Average daily low
23.2°C
Annual rainfall
3,628mm
Sunshine / day
9.4h
Mean relative humidity
86%
Average peak wind
10.0km/h
Seasonal range
1.1°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
10 d/yr
Rainy days (≥ 1 mm)
299 d/yr
Annual snowfall
0.0 cm
Average feels-like high
33.4 °C
Average feels-like low
27.3 °C
Average peak gust
25.9 km/h
Tropical nights (≥ 20 °C)
365 d/yr
Solar radiation
18.5 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.8 °C
since 1940
+0.2 °C per decade · r² = 0.88 · 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
33.2 °C
11 March 2010
Coldest day
20.4 °C
19 January 1940
Wettest day
296 mm
12 December 1990
Windiest day
26.6 km/h
25 November 2025
Strongest gust
57.2 km/h
25 November 2025
Hottest feels-like
40.1 °C
7 March 2016
Coldest feels-like
22.8 °C
10 November 1964
Sunniest day
12.1 h
21 June 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 | +0.6 °C | 323 mm | +7 mm |
| Feb | 29.0 °C | +0.8 °C | 248 mm | -48 mm |
| Mar | 28.5 °C | +0.4 °C | 496 mm | +133 mm |
| Apr | 28.8 °C | +0.7 °C | 400 mm | +58 mm |
| May | 29.2 °C | +0.9 °C | 112 mm | -119 mm |
| Jun | 29.1 °C | +0.9 °C | 147 mm | +6 mm |
| Jul | 28.4 °C | +0.6 °C | 129 mm | -41 mm |
| Aug | 28.5 °C | +1.0 °C | 276 mm | +45 mm |
| Sep | 27.9 °C | +0.7 °C | 210 mm | -87 mm |
| Oct | 28.4 °C | +1.3 °C | 302 mm | -90 mm |
| Nov | 26.9 °C | -0.1 °C | 846 mm | +402 mm |
| Dec | 27.5 °C | +0.2 °C | 408 mm | +3 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 Sibolga?
Sibolga has a tropical rainforest climate (Köppen Af). Over 1940-2025, the average annual temperature is 25.1 °C and it receives 3,628 mm of precipitation per year.
What is the hottest day ever recorded in Sibolga?
The hottest day measured in Sibolga between 1940 and 2025 was 11 March 2010, reaching 33.2 °C.
What is the coldest day in Sibolga?
The coldest day measured in Sibolga between 1940 and 2025 was 19 January 1940, at 20.4 °C.
Does it snow in Sibolga?
Almost never: Sibolga sees virtually no snow, with about 0 frost days per year.
Has the climate of Sibolga warmed?
Yes: Sibolga warmed by +1.8 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Sibolga?
The wettest day measured in Sibolga between 1940 and 2025 was 12 December 1990, with 296 mm of rain in 24 hours.
What was the windiest day in Sibolga?
The windiest day measured in Sibolga between 1940 and 2025 was 25 November 2025, with winds reaching 26.6 km/h.
What is the warmest month in Sibolga?
The warmest month in Sibolga is May (25.8 °C on average); the coldest is October (24.7 °C).
How much does it rain in Sibolga?
Sibolga receives on average 3,628 mm of precipitation per year, spread over about 299 rainy days.
Is it sunny in Sibolga?
Sibolga gets on average 9.4 hours of sunshine per day, roughly 3,431 hours per year over 1940-2025.
Are there tropical nights in Sibolga?
Yes: Sibolga has on average 365 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Sibolga?
In Sibolga, between 1940 and 2025, the highest apparent temperature reached 40.1 °C on 7 March 2016, and the lowest was 22.8 °C on 10 November 1964.
Compare Sibolga with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Sibolga