Climate averages 1991–2020
Sidoarjo weather
in January.
A hot, very wet month: the 11th warmest and the wettest of the year.
Long-term climate patterns, not a forecast for a particular trip.
January is a hot month in Sidoarjo: daytime highs average 29.6°C and nights cool to about 23.7°C. By daytime temperature it is the 11th warmest of the 12 months.
Expect about 298 mm of rain on roughly 29 days, which makes January a very wet month (the wettest month of the year). Daylight, from sunrise to sunset, lasts about 12 h 30 min on an average January day.
The nearest other city in this atlas is Bangil (20 km away). In January its highs average 29.1°C, 0.6°C cooler than Sidoarjo, with 298 mm of rain.
Among the 200 cities listed in Indonesia, Sidoarjo ranks joint 10th of 200 for the warmest January highs and joint 84th of 200 for the driest January (rainfall, lowest first). The mean January high of those 200 cities is 28.2°C; Sidoarjo is 1.4°C warmer than that mean.
From January to February, average highs fall by 0.1°C to 29.5°C, and monthly rainfall falls from 298 mm to 280 mm.
The annual picture
January 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
Sidoarjo climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January, selected | 29.6°C23.7°C | 23.7°C | 298 | 28.9 | 12.513 h |
| February | 29.5°C23.6°C | 23.6°C | 280 | 27.3 | 12.312 h |
| March | 29.8°C23.6°C | 23.6°C | 253 | 27.8 | 12.112 h |
| April | 30.1°C23.7°C | 23.7°C | 144 | 21.2 | 11.912 h |
| May | 30.9°C23.6°C | 23.6°C | 49 | 10.1 | 11.812 h |
| June | 30.9°C23.1°C | 23.1°C | 24 | 6.3 | 11.712 h |
| July | 31.2°C22.4°C | 22.4°C | 12 | 3.0 | 11.712 h |
| August | 32.1°C22.4°C | 22.4°C | 3.7 | 1.4 | 11.912 h |
| September | 33.3°C23.1°C | 23.1°C | 11 | 2.7 | 12.112 h |
| October | 33.6°C24.0°C | 24.0°C | 38 | 8.0 | 12.312 h |
| November | 32.1°C24.5°C | 24.5°C | 117 | 18.4 | 12.412 h |
| December | 30.2°C24.0°C | 24.0°C | 253 | 27.5 | 12.513 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
January in nearby cities
- Bangil in JanuaryIndonesia · 20 kmHigh 29.1°C · Low 22.8°C · 298 mm rain
- Surabaya in JanuaryIndonesia · 22 kmHigh 29.3°C · Low 24.8°C · 280 mm rain
- Pasuruan in JanuaryIndonesia · 30 kmHigh 28.6°C · Low 23.0°C · 376 mm rain
- Mojokerto in JanuaryIndonesia · 31 kmHigh 29.8°C · Low 23.0°C · 517 mm rain
- Kebomas in JanuaryIndonesia · 33 kmHigh 29.1°C · Low 24.2°C · 280 mm rain
- Lawang in JanuaryIndonesia · 43 kmHigh 27.6°C · Low 21.4°C · 510 mm rain
- Bangkalan in JanuaryIndonesia · 45 kmHigh 28.8°C · Low 25.2°C · 304 mm rain
- Singosari in JanuaryIndonesia · 50 kmHigh 27.5°C · Low 21.6°C · 387 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 Sidoarjo) is explained once on the Sidoarjo year overview and on the Sources, method and limits page.
Bangil lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.