Gunungsitoli climate — normals and trends
Gunungsitoli (Indonesia) has a tropical rainforest climate (Af) under the Köppen-Geiger classification. Its mean annual temperature is 26.4 °C and it receives 3,747 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 (27.0 °C on average) and the coldest is November (25.8 °C). Rainfall peaks in October.
Gunungsitoli averages 0 frost days, 104 hot days (≥ 30 °C) and 325 rainy days per year.
Gunungsitoli 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 33.4 °C (on 14 March 2020) and the coldest 22.0 °C (on 30 July 1956).
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
GunungsitoliNorth Sumatra
- coords
- 1.29°, 97.61°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
26.4°C
Average daily high
29.1°C
Average daily low
24.5°C
Annual rainfall
3,747mm
Sunshine / day
9.3h
Mean relative humidity
86%
Average peak wind
8.9km/h
Seasonal range
1.2°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
104 d/yr
Rainy days (≥ 1 mm)
325 d/yr
Annual snowfall
0.0 cm
Average feels-like high
35.7 °C
Average feels-like low
29.2 °C
Average peak gust
22.3 km/h
Tropical nights (≥ 20 °C)
365 d/yr
Solar radiation
17.6 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.7 °C
since 1940
+0.2 °C per decade · r² = 0.84 · 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
33.4 °C
14 March 2020
Coldest day
22.0 °C
30 July 1956
Wettest day
228 mm
12 October 1969
Windiest day
31.8 km/h
20 October 2025
Strongest gust
61.2 km/h
19 May 2020
Hottest feels-like
43.3 °C
11 April 2024
Coldest feels-like
24.7 °C
24 November 1953
Sunniest day
12.0 h
14 June 1944
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 | 29.7 °C | +0.6 °C | 460 mm | +188 mm |
| Feb | 30.4 °C | +0.9 °C | 229 mm | -2 mm |
| Mar | 30.0 °C | +0.5 °C | 460 mm | +152 mm |
| Apr | 30.0 °C | +0.6 °C | 302 mm | -27 mm |
| May | 30.4 °C | +0.7 °C | 192 mm | -78 mm |
| Jun | 30.6 °C | +1.1 °C | 147 mm | -55 mm |
| Jul | 30.0 °C | +0.9 °C | 207 mm | -28 mm |
| Aug | 30.0 °C | +1.1 °C | 250 mm | -44 mm |
| Sep | 29.6 °C | +0.9 °C | 323 mm | -27 mm |
| Oct | 29.8 °C | +1.4 °C | 308 mm | -136 mm |
| Nov | 28.1 °C | -0.2 °C | 532 mm | +90 mm |
| Dec | 28.8 °C | +0.2 °C | 357 mm | -13 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 Gunungsitoli?
Gunungsitoli has a tropical rainforest climate (Köppen Af). Over 1940-2025, the average annual temperature is 26.4 °C and it receives 3,747 mm of precipitation per year.
What is the hottest day ever recorded in Gunungsitoli?
The hottest day measured in Gunungsitoli between 1940 and 2025 was 14 March 2020, reaching 33.4 °C.
What is the coldest day in Gunungsitoli?
The coldest day measured in Gunungsitoli between 1940 and 2025 was 30 July 1956, at 22.0 °C.
Does it snow in Gunungsitoli?
Almost never: Gunungsitoli sees virtually no snow, with about 0 frost days per year.
Has the climate of Gunungsitoli warmed?
Yes: Gunungsitoli warmed by +1.7 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Gunungsitoli?
The wettest day measured in Gunungsitoli between 1940 and 2025 was 12 October 1969, with 228 mm of rain in 24 hours.
What was the windiest day in Gunungsitoli?
The windiest day measured in Gunungsitoli between 1940 and 2025 was 20 October 2025, with winds reaching 31.8 km/h.
What is the warmest month in Gunungsitoli?
The warmest month in Gunungsitoli is May (27.0 °C on average); the coldest is November (25.8 °C).
How much does it rain in Gunungsitoli?
Gunungsitoli receives on average 3,747 mm of precipitation per year, spread over about 325 rainy days.
Is it sunny in Gunungsitoli?
Gunungsitoli gets on average 9.3 hours of sunshine per day, roughly 3,395 hours per year over 1940-2025.
Are there tropical nights in Gunungsitoli?
Yes: Gunungsitoli has on average 365 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Gunungsitoli?
In Gunungsitoli, between 1940 and 2025, the highest apparent temperature reached 43.3 °C on 11 April 2024, and the lowest was 24.7 °C on 24 November 1953.
Compare Gunungsitoli with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Gunungsitoli