Environment Canada outlook signals above-normal heat and variable precipitation across Ontario’s 2026 growing season.
Ontario producers are heading into the 2026 growing season under a familiar but complex weather pattern. According to Environment and Climate Change Canada’s latest seasonal outlook, temperatures across much of the province are expected to trend above normal, while precipitation signals remain mixed and uncertain.
The result is a growing season that could deliver strong crop potential in some regions but introduce moisture stress and variability in others.
Environment Canada’s seasonal forecasting system indicates that Ontario, particularly southern and northwestern regions, has a meaningful probability of experiencing above-normal temperatures through late spring and into summer. In many areas, the likelihood of warmer-than-usual conditions ranges from approximately 40 to 70 percent, depending on location.
Ontario’s 2026 growing season is expected to be warmer than average overall.
Heat Expected to Boost Growth but Raise Moisture Demand
Warmer temperatures could benefit crop production by accelerating development and increasing growing degree day accumulation. For corn and soybean producers, this could support stronger growth potential and earlier maturity under favorable moisture conditions.
However, heat also increases evapotranspiration, placing greater pressure on soil moisture reserves. This means crops will require consistent rainfall to keep pace with higher water demand.
Even in areas that receive near-normal precipitation totals, elevated temperatures can create conditions that feel drier in practice. For producers, this will increase the importance of rainfall timing during key growth stages.
Rainfall Outlook Remains Highly Variable
Unlike temperature, precipitation forecasts provide far less clarity, so farmers will have to make their best guess. Environment Canada’s seasonal outlook framework frequently shows “equal chances” for above, near, or below normal rainfall across large areas, including Ontario.
This reflects a known limitation in long-range forecasting, where precipitation patterns are more difficult to predict with confidence. Environment Canada's current outlooks suggest Ontario could see a mix of weather conditions, including periods of warm, dry weather interrupted by rainfall events and thunderstorms - not that helpful.
Regional differences are also expected:
- Northern Ontario may see more consistent warmth with variable moisture
- Southern Ontario could experience alternating warm periods and unsettled conditions - what the area has already been exepriencing
- Localized areas may trend wetter or drier depending on storm tracks
This variability means that conditions will likely differ significantly even within relatively short distances.
Soil Moisture Conditions Entering the Season
Current drought monitoring data shows that Ontario enters the 2026 growing season in relatively stable condition compared to the Prairies. As of April, only a small portion of the province is classified under drought, although a larger share is considered “abnormally dry.” (Read the article: El Niño Could Mean Hotter Summer Raises Moisture and Drought Risks for the Prairies.)
This starting point provides some resilience heading into planting. Early-season precipitation and snowmelt have helped maintain soil moisture levels in many regions, reducing immediate drought concerns.
However, this advantage could diminish quickly if rainfall becomes inconsistent as temperatures rise, as farmers in Eastern Ontario will remember last year's drought.
El Niño Influence Increases Forecast Uncertainty
The 2026 growing season is also being shaped by a transition toward El Niño conditions. This large-scale climate pattern is known to influence temperature and precipitation across North America.
For eastern Canada, including Ontario, El Niño often introduces greater variability. Some forecasts suggest the province could experience more unsettled weather patterns, with alternating warm spells and periods of cloud cover and precipitation.
In certain scenarios, this could limit prolonged heat extremes but increase the frequency of storms and shifting conditions. Other model interpretations suggest that eastern regions may be influenced by low-pressure systems that disrupt stable summer weather patterns.
The key takeaway is that El Niño adds complexity rather than clarity to the precipitation outlook - nothing new from a farmer's perspective.
A Season Defined by Regional Differences
Unlike the Prairies, where heat and dryness risks are more uniform, Ontario’s 2026 season is expected to vary considerably across regions.
Potential scenarios include:
- Favorable growing conditions in areas that receive timely rainfall
- Periodic stress in regions that experience extended dry intervals
- Increased risk of heavy rainfall events and localized flooding in some zones
- More frequent weather swings affecting field operations
This regional variability reinforces the need for localized monitoring and responsive farm management decision making.
Key considerations include:
- Monitoring soil moisture closely as temperatures rise
- Adjusting management practices based on rainfall timing
- Being prepared for both dry spells and short periods of excess moisture
- Remaining flexible with field operations and crop inputs
The lack of a strong precipitation signal means that proactive decision-making will play a critical role in managing risk.
Outlook Suggests Opportunity with Caution
The 2026 growing season in Ontario presents both opportunity and uncertainty - just like every other growing season.