Sewon climate — normals and trends
Sewon (Indonesia) has a tropical savanna climate (Aw) under the Köppen-Geiger classification. Its mean annual temperature is 25.7 °C and it receives 1,800 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 April (26.4 °C on average) and the coldest is August (24.6 °C). Rainfall peaks in December.
Sewon averages 0 frost days, 0 hot days (≥ 30 °C) and 228 rainy days per year.
Sewon has warmed by +0.7 °C between 1940 and 2025, or +0.08 °C per decade. This trend is statistically significant.
The hottest day of the period reached 30.5 °C (on 16 May 2010) and the coldest 19.6 °C (on 22 July 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
SewonSpecial Region of Yogyakarta
- coords
- -7.88°, 110.36°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
25.7°C
Average daily high
26.9°C
Average daily low
24.5°C
Annual rainfall
1,800mm
Sunshine / day
10.2h
Mean relative humidity
84%
Average peak wind
20.7km/h
Seasonal range
1.8°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
228 d/yr
Annual snowfall
0.0 cm
Average feels-like high
31.1 °C
Average feels-like low
28.0 °C
Average peak gust
30.2 km/h
Tropical nights (≥ 20 °C)
365 d/yr
Solar radiation
19.5 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+0.7 °C
since 1940
+0.1 °C per decade · r² = 0.27 · 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
30.5 °C
16 May 2010
Coldest day
19.6 °C
22 July 1997
Wettest day
226 mm
7 February 1975
Windiest day
47.1 km/h
2 January 2007
Strongest gust
73.1 km/h
2 January 2007
Hottest feels-like
38.2 °C
25 April 1983
Coldest feels-like
21.9 °C
9 August 1976
Sunniest day
12.5 h
23 December 1941
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 | 27.7 °C | +0.6 °C | 384 mm | +104 mm |
| Feb | 28.2 °C | +1.0 °C | 247 mm | +16 mm |
| Mar | 28.4 °C | +1.0 °C | 202 mm | -14 mm |
| Apr | 28.2 °C | +0.4 °C | 112 mm | -31 mm |
| May | 28.1 °C | +0.3 °C | 218 mm | +116 mm |
| Jun | 28.2 °C | +1.0 °C | 65 mm | -7 mm |
| Jul | 26.8 °C | +0.4 °C | 30 mm | -15 mm |
| Aug | 27.2 °C | +1.4 °C | 94 mm | +70 mm |
| Sep | 27.1 °C | +1.3 °C | 97 mm | +51 mm |
| Oct | 27.3 °C | +0.8 °C | 351 mm | +222 mm |
| Nov | 27.3 °C | +0.3 °C | 473 mm | +250 mm |
| Dec | 27.8 °C | +0.8 °C | 157 mm | -132 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 Sewon?
Sewon has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 25.7 °C and it receives 1,800 mm of precipitation per year.
What is the hottest day ever recorded in Sewon?
The hottest day measured in Sewon between 1940 and 2025 was 16 May 2010, reaching 30.5 °C.
What is the coldest day in Sewon?
The coldest day measured in Sewon between 1940 and 2025 was 22 July 1997, at 19.6 °C.
Does it snow in Sewon?
Almost never: Sewon sees virtually no snow, with about 0 frost days per year.
Has the climate of Sewon warmed?
Yes: Sewon warmed by +0.7 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Sewon?
The wettest day measured in Sewon between 1940 and 2025 was 7 February 1975, with 226 mm of rain in 24 hours.
What was the windiest day in Sewon?
The windiest day measured in Sewon between 1940 and 2025 was 2 January 2007, with winds reaching 47.1 km/h.
What is the warmest month in Sewon?
The warmest month in Sewon is April (26.4 °C on average); the coldest is August (24.6 °C).
How much does it rain in Sewon?
Sewon receives on average 1,800 mm of precipitation per year, spread over about 228 rainy days.
Is it sunny in Sewon?
Sewon gets on average 10.2 hours of sunshine per day, roughly 3,723 hours per year over 1940-2025.
Are there tropical nights in Sewon?
Yes: Sewon has on average 365 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Sewon?
In Sewon, between 1940 and 2025, the highest apparent temperature reached 38.2 °C on 25 April 1983, and the lowest was 21.9 °C on 9 August 1976.
Compare Sewon with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Sewon