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Semarang weather by month
Historical averages 2016–2025 · not a forecast
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When is the best time to visit Semarang?
For a warm holiday, the best week has been 11–17 July (Weather Index 78). Favourable start dates for a 7-day trip run from 6 July to 2 August. August, September and October are warmest (34°C), August is driest and July to October have the most sun.
- Warmest
- August, September and October 34°C
- Coolest
- January and February 31°C
- Driest
- August 16% rain-day chance
- Wettest
- February 99% rain-day chance
- Sunniest
- July to October 11 hours a day
A rain day has 1 mm or more, snow included, so a short shower counts. Monthly averages below give the amounts.
Monthly averages in Semarang
Semarang historical monthly estimates, 2016–2025. Temperatures and sunshine are daily averages.
| Month | High (°C) | Low (°C) | Rain-day chance (%) | Expected rain days | Precipitation (mm/month) | Sunshine (hours/day) |
|---|---|---|---|---|---|---|
| January | 31.1 | 25.1 | 95.8 | 29.7 | 398.9 | 8.4 |
| February | 30.8 | 25.0 | 98.9 | 27.7 | 368.1 | 8.2 |
| March | 31.6 | 25.2 | 96.1 | 29.8 | 349.2 | 9.3 |
| April | 32.4 | 25.4 | 85.3 | 25.6 | 212.6 | 10.1 |
| May | 33.0 | 25.5 | 50.3 | 15.6 | 107.5 | 10.4 |
| June | 32.9 | 24.9 | 41.0 | 12.3 | 77.1 | 10.5 |
| July | 33.2 | 24.3 | 18.4 | 5.7 | 31.8 | 10.9 |
| August | 33.8 | 24.6 | 15.8 | 4.9 | 31.8 | 11.1 |
| September | 34.3 | 25.1 | 30.0 | 9.0 | 64.2 | 10.9 |
| October | 34.2 | 25.6 | 51.3 | 15.9 | 162.6 | 10.6 |
| November | 32.7 | 25.3 | 88.0 | 26.4 | 318.7 | 9.3 |
| December | 31.7 | 25.1 | 91.3 | 28.3 | 369.3 | 8.8 |
Each month averages its own days. Precipitation includes snow. About the data
Sources
Open-Meteo · 1 Jan 2016 – 31 Dec 2025
- Open-Meteo Historical Weather API
- Local days, 2016–2025, every year weighted equally. Each weekly chart averages its own seven days, without smoothing.
- Shading shows the 10th–90th percentile of past days, not forecast confidence.
- A rain day has at least 1 mm, snow included. The last weekly period has eight days.
- Wind is the average daytime (10:00–18:00) maximum, not gusts. Daylight is calculated from latitude. Missing readings stay blank.
- Mugginess (dew point) comes from the original daily summaries, on UTC days.
- The live two-week forecast comes from the Open-Meteo Weather Forecast API. The Weather Index does not use it.