GreenlyFrost dates and when to plant in South Australia
Australia
None of the 2 cities in South Australia had frost in 2016–2025, so crops are planted by warmth and rain rather than by frost dates.
Frost dates by city in South Australia
| City | Last spring frost | First autumn frost | Frost-free days | Climate zone | Tomato: window |
|---|---|---|---|---|---|
| Adelaide | none in ten years | none in ten years | — | No frost in ten years | — |
| Mount Gambier | none in ten years | none in ten years | — | No frost 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.
Weather by month in South Australia
Across the 2 cities the warmest month is January (average days 25.7 … 28.1 °C) and the coldest July (average nights 7.2 … 9.2 °C). No city here averages below 0 °C at night in any month.
| Month | Day, °C | Night, °C | Rain, mm |
|---|---|---|---|
| January | 25.7 … 28.1 °C | 14.2 … 18.2 °C | 31 |
| February | 24.3 … 26.8 °C | 13.9 … 17.7 °C | 23 |
| March | 22.9 … 25.5 °C | 13.2 … 16.9 °C | 25 |
| April | 19.4 … 21.7 °C | 11.3 … 14.4 °C | 44 |
| May | 15.8 … 17.6 °C | 9.2 … 11.6 °C | 73 |
| June | 13.3 … 14.8 °C | 7.3 … 9.7 °C | 92 |
| July | 12.8 … 14.1 °C | 7.2 … 9.2 °C | 107 |
| August | 13.8 … 15.1 °C | 7.5 … 9.6 °C | 102 |
| September | 15.2 … 17.2 °C | 8.3 … 10.6 °C | 77 |
| October | 17.6 … 20.2 °C | 9.3 … 12.4 °C | 73 |
| November | 20.1 … 22.6 °C | 10.9 … 14.1 °C | 64 |
| December | 22.7 … 25.8 °C | 12.2 … 16.1 °C | 33 |
Day and night: the lowest … highest monthly average among the cities; rain: the middle city (ERA5 via Open-Meteo).
