Indonesia: frost dates by city

The average last spring frost and first autumn frost in Indonesia, from ten years of weather.

City	Last spring frost	First autumn frost	Frost-free days	Soil at 10 °C	Tomato: planting out	Places to buy (OpenStreetMap)
Bandar Lampung	none in ten years	none in ten years	—	already in the first week of July	—	9
Bandung	none in ten years	none in ten years	—	already in the first week of July	—	63
Batam	none in ten years	none in ten years	—	already in the first week of January	—	48
Denpasar	none in ten years	none in ten years	—	already in the first week of July	—	74
Jakarta	none in ten years	none in ten years	—	already in the first week of July	—	230
Makassar	none in ten years	none in ten years	—	already in the first week of July	—	339
Malang	none in ten years	none in ten years	—	already in the first week of July	—	47
Manado	none in ten years	none in ten years	—	already in the first week of January	—	68
Medan	none in ten years	none in ten years	—	already in the first week of January	—	47
Padang	none in ten years	none in ten years	—	already in the first week of July	—	15
Palembang	none in ten years	none in ten years	—	already in the first week of July	—	26
Pekanbaru	none in ten years	none in ten years	—	already in the first week of January	—	40
Pontianak	none in ten years	none in ten years	—	already in the first week of January	—	10
Semarang	none in ten years	none in ten years	—	already in the first week of July	—	65
Surabaya	none in ten years	none in ten years	—	already in the first week of July	—	99
Yogyakarta	none in ten years	none in ten years	—	already in the first week of July	—	146

Places: © OpenStreetMap contributors, ODbL.

Gardening in Indonesia: climate zones and crops by region

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.