GreenlyLast and first frost dates in Semarang
Indonesia
Semarang had no frost in 2016–2025, so crops are planted by warmth and rain rather than by frost dates.
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| Last spring frost | none in ten years |
|---|---|
| First autumn frost | none in ten years |
Median of 2016–2025 for the 25 km grid cell of the city: the last day at or below 0 °C in spring and the first in autumn (ERA5 reanalysis via Open-Meteo). In a cold year a frost can come a week or two later — Greenly warns 48 hours ahead.
There is no frost season here: crops are planted by warmth and rain rather than by frost dates.
When the soil warms up in Semarang
The day the top 7 cm of soil first averages each temperature over a week, median of 2016–2025 (ERA5 via Open-Meteo).
| Soil | Date |
|---|---|
| 5 °C | already in the first week of July |
| 10 °C | already in the first week of July |
| 15 °C | already in the first week of July |
| 18 °C | already in the first week of July |
Frost dates near Semarang
| City | Distance | Last spring frost | First autumn frost |
|---|---|---|---|
| Yogyakarta | 90 km | — | — |
| Surabaya | 258 km | — | — |
| Malang | 266 km | — | — |
| Bandung | 310 km | — | — |
| Jakarta | 407 km | — | — |
Semarang: weather for the next 7 days
Forecast by Open-Meteo. Nights at or below 0 °C are marked as frost.
Weather in Semarang by month
Average weather in Semarang over 2016–2025: the warmest month is September. Months that average 20 °C or more by day: January–December (29.3–34.7 °C). Months that average 30 °C or more by day: March–December (30.2–34.7 °C). No month averages below 0 °C at night; the coldest nights, in July, average 23.5 °C. About 1890 mm of rain falls in a year, on 223 days; February is the wettest month (274 mm) and July the driest (36 mm).
| Month | Day, °C | Night, °C | Rain, mm | Rainy days |
|---|---|---|---|---|
| January | 29.6 | 24 | 258 | 26 |
| February | 29.3 | 23.9 | 274 | 25 |
| March | 30.2 | 24 | 214 | 26 |
| April | 31.5 | 24.2 | 172 | 24 |
| May | 32.5 | 24.4 | 118 | 16 |
| June | 32.7 | 23.8 | 82 | 14 |
| July | 33.6 | 23.5 | 36 | 7 |
| August | 34.5 | 23.8 | 38 | 6 |
| September | 34.7 | 24.3 | 77 | 10 |
| October | 34 | 24.5 | 143 | 17 |
| November | 32.1 | 24.3 | 245 | 25 |
| December | 30.5 | 24.1 | 233 | 27 |
Average of the daily highs and lows, rain per month and days with at least 1 mm (ERA5 via Open-Meteo, the same grid cell as the frost dates).
