Singapore in September: what to plant
Over the last 5 years, September in Singapore has run 24.3–29.9°C with about 240 mm of rain across the month. Here is what weather like that will carry to harvest.
Everything above is a five-year average. In the game it is this — the weather Singapore is actually having, today.
Grow one in Singapore's weather right now →❄️ No sub-zero nights in September in the last 5 years — frost is not the limiting factor here.
🗓️ No night at or below 0°C in the last 5 years — frost is not a limiting factor here, and tender crops can stay out year-round.
☀️ About 9.2 h of sunshine a day this month. Temperatures hold steady through the month.
Sow this month — when would you harvest?
Assuming you sow in mid-September, then adding up the warmth Singapore usually gets, one day at a time — which is why some of these run past the end of the month.
| Crop | Days | Harvest around |
|---|---|---|
| 🧅 Onion | 48 | Nov 1 |
| 🍈 Winter melon | 107 | Dec 30 |
| 🌱 Microgreens | 5 | Sep 19 |
| 🏵️ Marigold | 30 | Oct 14 |
| 🌿 Amaranth greens | 33 | Oct 17 |
| 🥢 Green Beans | 35 | Oct 19 |
| 🥒 Zucchini | 38 | Oct 22 |
| 🌽 Sweet Corn | 53 | Nov 6 |
| 🌻 Sunflower | 53 | Nov 6 |
| 🌿 Basil | 20 | Oct 4 |
| 🍃 Mint | 20 | Oct 4 |
| 🧅 Chives | 22 | Oct 6 |
Best crops to sow now
They are all ideal for this month — the only real difference is how long each one takes, so pick whatever you want to eat.
- 🧅 Onion about 48 days to harvest Recent mean 27.1°C — right in the sweet spot
- 🍈 Winter melon about 106 days to harvest Recent mean 27.1°C — right in the sweet spot
- 🌱 Microgreens about 5 days to harvest 🪴 Windowsill pot — sheltered from outdoor weather
- 🏵️ Marigold about 30 days to harvest Recent mean 27.1°C — right in the sweet spot
- 🌿 Amaranth greens about 33 days to harvest Recent mean 27.1°C — right in the sweet spot
- 🥢 Green Beans about 36 days to harvest Recent mean 27.1°C — right in the sweet spot
- 🥒 Zucchini about 39 days to harvest Recent mean 27.1°C — right in the sweet spot
- 🌽 Sweet Corn about 53 days to harvest Recent mean 27.1°C — right in the sweet spot
- 🌻 Sunflower about 53 days to harvest Recent mean 27.1°C — right in the sweet spot
- 🌿 Basil about 20 days to harvest 🪴 Windowsill pot — sheltered from outdoor weather
- 🍃 Mint about 20 days to harvest 🪴 Windowsill pot — sheltered from outdoor weather
- 🧅 Chives about 22 days to harvest 🪴 Windowsill pot — sheltered from outdoor weather
Leave these for another month
- 🌿 Dill — Recent mean 27.1°C is too hot (ideal 9–26°C)
- 🌿 Parsley — Recent mean 27.1°C is too hot (ideal 7–25°C)
- 🌿 Coriander — Recent mean 27.1°C is too hot (ideal 8–24°C)
Other months in Singapore
📍 Somewhere else? Look up your own city →
Temperature and rainfall come from Open-Meteo's historical observations for Singapore, averaged day by day over the last 5 years. Whether a crop finishes in time is worked out from its own starting temperature and heat requirement — those numbers are listed on each crop page if you want to check them.