Climate averages 1991–2020
Sewon weather
in December.
A hot, very wet month: the coolest and the wettest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a hot month in Sewon: daytime highs average 28.3°C and nights cool to about 23.7°C. By daytime temperature it is the coolest month of the year.
Expect about 339 mm of rain on roughly 28 days, which makes December a very wet month (the wettest month of the year). Daylight, from sunrise to sunset, lasts about 12 h 34 min on an average December day.
The nearest other city in this atlas is Kasihan (6 km away). In December its highs average 27.9°C, about as warm as Sewon, with 377 mm of rain.
Among the 200 cities listed in Indonesia, Sewon ranks joint 125th of 200 for the warmest December highs and 112th of 200 for the driest December (rainfall, lowest first). The mean December high of those 200 cities is 28.4°C; Sewon is 0.1°C cooler than that mean.
From December to January, average highs rise by 0.1°C to 28.4°C, and monthly rainfall falls from 339 mm to 283 mm.
The annual picture
December in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Sewon climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 28.4°C23.6°C | 23.6°C | 283 | 28.0 | 12.513 h |
| February | 28.6°C23.6°C | 23.6°C | 233 | 24.6 | 12.412 h |
| March | 28.9°C23.6°C | 23.6°C | 211 | 26.5 | 12.212 h |
| April | 29.2°C23.7°C | 23.7°C | 161 | 23.0 | 11.912 h |
| May | 29.4°C23.4°C | 23.4°C | 82 | 14.5 | 11.812 h |
| June | 29.3°C22.7°C | 22.7°C | 62 | 9.8 | 11.712 h |
| July | 28.9°C21.9°C | 21.9°C | 29 | 5.9 | 11.712 h |
| August | 29.0°C21.6°C | 21.6°C | 18 | 3.6 | 11.912 h |
| September | 29.5°C22.3°C | 22.3°C | 36 | 7.9 | 12.112 h |
| October | 29.7°C23.2°C | 23.2°C | 121 | 17.1 | 12.312 h |
| November | 29.0°C23.8°C | 23.8°C | 242 | 25.2 | 12.512 h |
| December, selected | 28.3°C23.7°C | 23.7°C | 339 | 27.6 | 12.613 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
December in nearby cities
- Kasihan in DecemberIndonesia · 6 kmHigh 27.9°C · Low 22.9°C · 377 mm rain
- Yogyakarta in DecemberIndonesia · 8 kmHigh 28.1°C · Low 22.6°C · 377 mm rain
- Wonosari in DecemberIndonesia · 29 kmHigh 28.0°C · Low 23.1°C · 310 mm rain
- Klaten in DecemberIndonesia · 33 kmHigh 28.3°C · Low 22.0°C · 391 mm rain
- Muntilan in DecemberIndonesia · 34 kmHigh 27.2°C · Low 21.2°C · 394 mm rain
- Magelang in DecemberIndonesia · 48 kmHigh 27.0°C · Low 20.7°C · 394 mm rain
- Kartasura in DecemberIndonesia · 55 kmHigh 28.6°C · Low 22.3°C · 313 mm rain
- Salatiga in DecemberIndonesia · 62 kmHigh 27.2°C · Low 20.8°C · 467 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Sewon) is explained once on the Sewon year overview and on the Sources, method and limits page.