Poso climate — normals and trends
Poso (Indonesia) has a tropical rainforest climate (Af) under the Köppen-Geiger classification. Its mean annual temperature is 22.8 °C and it receives 3,295 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 (23.1 °C on average) and the coldest is January (22.4 °C). Rainfall peaks in April.
Poso averages 0 frost days, 7 hot days (≥ 30 °C) and 310 rainy days per year.
Poso has warmed by +2.1 °C between 1940 and 2025, or +0.25 °C per decade. This trend is statistically significant.
The hottest day of the period reached 33.8 °C (on 12 October 2023) and the coldest 16.7 °C (on 29 August 1965).
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
PosoCentral Sulawesi
- coords
- -1.40°, 120.75°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
22.8°C
Average daily high
26.7°C
Average daily low
20.2°C
Annual rainfall
3,295mm
Sunshine / day
9.7h
Mean relative humidity
86%
Average peak wind
8.2km/h
Seasonal range
0.7°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
7 d/yr
Rainy days (≥ 1 mm)
310 d/yr
Annual snowfall
0.0 cm
Average feels-like high
31.6 °C
Average feels-like low
23.0 °C
Average peak gust
26.5 km/h
Tropical nights (≥ 20 °C)
228 d/yr
Solar radiation
18.1 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.1 °C
since 1940
+0.3 °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
33.8 °C
12 October 2023
Coldest day
16.7 °C
29 August 1965
Wettest day
174 mm
14 June 1967
Windiest day
14.9 km/h
11 November 1972
Strongest gust
47.2 km/h
7 March 1990
Hottest feels-like
38.0 °C
15 October 2023
Coldest feels-like
15.9 °C
21 August 1972
Sunniest day
12.0 h
30 March 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 | 27.8 °C | +1.8 °C | 416 mm | +153 mm |
| Feb | 28.2 °C | +2.2 °C | 246 mm | +15 mm |
| Mar | 27.8 °C | +1.5 °C | 553 mm | +233 mm |
| Apr | 27.6 °C | +0.9 °C | 414 mm | +27 mm |
| May | 28.1 °C | +1.1 °C | 740 mm | +405 mm |
| Jun | 27.6 °C | +0.9 °C | 323 mm | +57 mm |
| Jul | 28.4 °C | +1.9 °C | 161 mm | -41 mm |
| Aug | 27.8 °C | +0.8 °C | 258 mm | +70 mm |
| Sep | 29.0 °C | +1.5 °C | 192 mm | +1 mm |
| Oct | 28.7 °C | +1.0 °C | 394 mm | +152 mm |
| Nov | 27.9 °C | +0.8 °C | 327 mm | -8 mm |
| Dec | 27.6 °C | +1.3 °C | 260 mm | -76 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 Poso?
Poso has a tropical rainforest climate (Köppen Af). Over 1940-2025, the average annual temperature is 22.8 °C and it receives 3,295 mm of precipitation per year.
What is the hottest day ever recorded in Poso?
The hottest day measured in Poso between 1940 and 2025 was 12 October 2023, reaching 33.8 °C.
What is the coldest day in Poso?
The coldest day measured in Poso between 1940 and 2025 was 29 August 1965, at 16.7 °C.
Does it snow in Poso?
Almost never: Poso sees virtually no snow, with about 0 frost days per year.
Has the climate of Poso warmed?
Yes: Poso warmed by +2.1 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Poso?
The wettest day measured in Poso between 1940 and 2025 was 14 June 1967, with 174 mm of rain in 24 hours.
What was the windiest day in Poso?
The windiest day measured in Poso between 1940 and 2025 was 11 November 1972, with winds reaching 14.9 km/h.
What is the warmest month in Poso?
The warmest month in Poso is May (23.1 °C on average); the coldest is January (22.4 °C).
How much does it rain in Poso?
Poso receives on average 3,295 mm of precipitation per year, spread over about 310 rainy days.
Is it sunny in Poso?
Poso gets on average 9.7 hours of sunshine per day, roughly 3,540 hours per year over 1940-2025.
Are there tropical nights in Poso?
Yes: Poso has on average 228 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Poso?
In Poso, between 1940 and 2025, the highest apparent temperature reached 38.0 °C on 15 October 2023, and the lowest was 15.9 °C on 21 August 1972.
Compare Poso with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Poso