Sugar is one of the most weather-sensitive commodities. Understanding weather patterns is essential for anticipating supply disruptions.
Why Weather Matters
| Stage | Weather Need | Risk |
|---|
| Planting | Adequate moisture | Poor germination |
| Growing | Sun + rain balance | Reduced yields |
| Maturation | Dry period | Low sucrose |
| Harvest | Dry conditions | Delays, losses |
Historical Events
| Year | Event | Impact |
|---|
| 2021 | Brazil frost | 5% damage, +15% price |
| 2021 | Brazil drought | -15% crop |
| 2019 | Thailand El Niño | -20% output |
| 2016 | Global El Niño | +100% price |
Sugarcane Requirements
| Factor | Optimal | Risk |
|---|
| Temperature | 20-35°C | <15°C stops growth |
| Rainfall | 1,500-2,500 mm | Drought reduces yield |
| Sunlight | High | Low sun reduces sugar |
| Humidity | 70-85% | Affects disease |
Frost Damage
| Temperature | Impact |
|---|
| 0 to -2°C | Leaf damage |
| -2 to -4°C | Stalk damage |
| < -4°C | Crop destruction |
El Niño & La Niña
What is ENSO?
Climate pattern in Pacific Ocean affecting global weather.
| Phase | Pacific SST | Global Impact |
|---|
| El Niño | Warmer | Drought Asia, rain Americas |
| La Niña | Cooler | Floods Asia, drought Americas |
Impact on Sugar
El Niño
| Region | Effect | Price Impact |
|---|
| Brazil | Better rainfall | Bearish |
| India | Weak monsoon | Bullish |
| Thailand | Drought | Bullish |
| Australia | Drought | Bullish |
| Net | Usually BULLISH | +++ |
La Niña
| Region | Effect | Price Impact |
|---|
| Brazil | Drought risk | Bullish |
| India | Good monsoon | Bearish |
| Thailand | Good rainfall | Bearish |
| Net | Usually BEARISH | --- |
Brazil Weather
Climate Pattern
| Season | Months | Risk |
|---|
| Wet | Oct-Mar | Harvest delays |
| Dry | Apr-Sep | Ideal crushing |
| Winter | Jun-Aug | Frost risk |
Key Risks
Drought Impact
| Deficit | Yield Impact |
|---|
| -10% rain | -3 to -5% |
| -20% rain | -8 to -12% |
| -30% rain | -15 to -20% |
2021: 30% deficit → 15% crop loss
Frost Risk Areas
São Paulo, Paraná, Mato Grosso do Sul
| Frost Type | Impact |
|---|
| Light | Minor leaf damage |
| Moderate | Urgent harvest needed |
| Severe | Major destruction |
India Monsoon
Why Critical
80% of India’s sugar crop is rain-fed.
Monsoon Calendar
| Phase | Timing |
|---|
| Onset | June 1 (Kerala) |
| Advancement | June-July |
| Peak | July-August |
| Withdrawal | September |
Impact by State
| State | Dependence |
|---|
| Maharashtra | Very High |
| Uttar Pradesh | High |
| Karnataka | High |
Monsoon Classification
| Classification | % of Normal |
|---|
| Excess | >110% |
| Normal | 96-104% |
| Below Normal | 90-96% |
| Deficient | <90% |
Normal LPA = 880 mm (June-September)
Thailand Weather
Seasons
| Season | Months | Sugar Impact |
|---|
| Hot | Mar-May | Irrigation needed |
| Rainy | Jun-Oct | Growth phase |
| Cool | Nov-Feb | Harvest |
Drought Vulnerability
Northeast (55% of crop) is highly drought-prone.
| Deficit | Crop Impact |
|---|
| -20% | -10 to -15% |
| -30% | -20 to -30% |
| -40% | -35 to -45% |
2015/16 El Niño: -35% rain → -25% output
Australia Weather
Key Risks
Cyclones
Season: November-April
Zone: North Queensland coast
| Category | Impact |
|---|
| 1-2 | Minor damage |
| 3 | Significant crop damage |
| 4-5 | Severe destruction |
Drought
| Duration | Impact |
|---|
| 3-6 months | 5-10% reduction |
| 6-12 months | 15-25% reduction |
| >12 months | 30%+ reduction |
Seasonal Price Pattern
Typical Annual Pattern
| Period | Driver | Typical Action |
|---|
| Jan-Mar | Brazil off-season | Firm, tight supply |
| Apr-May | Brazil starts | Begin weakening |
| Jun-Aug | Brazil peak | Seasonal lows |
| Sep-Oct | Brazil ending | Start firming |
| Nov-Dec | India/Thai starting | Variable |
Weather Watch Calendar
| Month | Key Watch |
|---|
| Jan | Brazil rains |
| Feb | India harvest |
| May | India monsoon forecast |
| Jun | Monsoon onset |
| Jul-Aug | Brazil frost |
| Sep | Monsoon progress |
| Nov-Dec | Australia cyclone |
Data Sources
Free Resources
ENSO Forecasts
| Source | URL |
|---|
| NOAA CPC | cpc.ncep.noaa.gov |
| Australian BOM | bom.gov.au/climate/enso |
| IRI Columbia | iri.columbia.edu |
Key Takeaways
- Weather = Price driver — Major events move prices
- ENSO is critical — Affects all major producers
- Brazil frost — July-August spike risk
- India monsoon — Single most important event
- Seasonal patterns — Prices follow cycles
- Monitor continuously — Weather changes daily
References