Bitung climate — normals and trends
Bitung (Indonesia) has a tropical rainforest climate (Af) under the Köppen-Geiger classification. Its mean annual temperature is 26.5 °C and it receives 1,950 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 (26.8 °C on average) and the coldest is January (26.1 °C). Rainfall peaks in May.
Bitung averages 0 frost days, 17 hot days (≥ 30 °C) and 266 rainy days per year.
Bitung has warmed by +1.5 °C between 1940 and 2025, or +0.17 °C per decade. This trend is statistically significant.
The hottest day of the period reached 32.7 °C (on 7 December 2019) and the coldest 22.5 °C (on 4 September 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
BitungNorth Sulawesi
- coords
- 1.44°, 125.13°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
26.5°C
Average daily high
28.2°C
Average daily low
25.1°C
Annual rainfall
1,950mm
Sunshine / day
10.6h
Mean relative humidity
84%
Average peak wind
13.1km/h
Seasonal range
0.7°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
17 d/yr
Rainy days (≥ 1 mm)
266 d/yr
Annual snowfall
0.0 cm
Average feels-like high
34.0 °C
Average feels-like low
29.2 °C
Average peak gust
30.0 km/h
Tropical nights (≥ 20 °C)
365 d/yr
Solar radiation
20.4 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.5 °C
since 1940
+0.2 °C per decade · r² = 0.83 · 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
32.7 °C
7 December 2019
Coldest day
22.5 °C
4 September 1997
Wettest day
145 mm
1 May 1982
Windiest day
33.2 km/h
12 August 2006
Strongest gust
74.2 km/h
13 September 2019
Hottest feels-like
40.6 °C
8 May 2019
Coldest feels-like
24.2 °C
17 August 2015
Sunniest day
11.9 h
8 February 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 | 29.1 °C | +1.4 °C | 405 mm | +224 mm |
| Feb | 29.1 °C | +1.5 °C | 187 mm | +15 mm |
| Mar | 29.0 °C | +1.0 °C | 374 mm | +204 mm |
| Apr | 29.0 °C | +0.6 °C | 299 mm | +112 mm |
| May | 29.3 °C | +0.8 °C | 360 mm | +124 mm |
| Jun | 29.0 °C | +0.9 °C | 312 mm | +103 mm |
| Jul | 29.3 °C | +1.5 °C | 120 mm | -24 mm |
| Aug | 28.5 °C | +0.5 °C | 229 mm | +131 mm |
| Sep | 28.8 °C | +0.5 °C | 168 mm | +71 mm |
| Oct | 29.4 °C | +0.7 °C | 203 mm | +74 mm |
| Nov | 29.8 °C | +1.2 °C | 133 mm | -29 mm |
| Dec | 29.2 °C | +1.1 °C | 135 mm | -31 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 Bitung?
Bitung has a tropical rainforest climate (Köppen Af). Over 1940-2025, the average annual temperature is 26.5 °C and it receives 1,950 mm of precipitation per year.
What is the hottest day ever recorded in Bitung?
The hottest day measured in Bitung between 1940 and 2025 was 7 December 2019, reaching 32.7 °C.
What is the coldest day in Bitung?
The coldest day measured in Bitung between 1940 and 2025 was 4 September 1997, at 22.5 °C.
Does it snow in Bitung?
Almost never: Bitung sees virtually no snow, with about 0 frost days per year.
Has the climate of Bitung warmed?
Yes: Bitung warmed by +1.5 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Bitung?
The wettest day measured in Bitung between 1940 and 2025 was 1 May 1982, with 145 mm of rain in 24 hours.
What was the windiest day in Bitung?
The windiest day measured in Bitung between 1940 and 2025 was 12 August 2006, with winds reaching 33.2 km/h.
What is the warmest month in Bitung?
The warmest month in Bitung is May (26.8 °C on average); the coldest is January (26.1 °C).
How much does it rain in Bitung?
Bitung receives on average 1,950 mm of precipitation per year, spread over about 266 rainy days.
Is it sunny in Bitung?
Bitung gets on average 10.6 hours of sunshine per day, roughly 3,869 hours per year over 1940-2025.
Are there tropical nights in Bitung?
Yes: Bitung has on average 365 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Bitung?
In Bitung, between 1940 and 2025, the highest apparent temperature reached 40.6 °C on 8 May 2019, and the lowest was 24.2 °C on 17 August 2015.
Compare Bitung with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Bitung