Calgary's dry summers and occasional Stage 2 water restrictions make irrigation timing critical — water at the wrong time of day and you lose 30-50% to evaporation or promote lawn disease. This guide explains the optimal watering window for Calgary lawns and how J.G. Irrigation programs controllers to hit it automatically.
Watering Time Comparison — Calgary Irrigation
| Time of Day | Effectiveness | Reason |
|---|---|---|
| Early morning (4am-8am) | Best — recommended for Calgary | Low wind, low temp, water soaks before heat evaporates it. Blades dry by midday, preventing fungal disease |
| Midday (10am-4pm) | Worst — avoid | 30-50% evaporation loss. Calgary summer wind (chinook gusts) disperses spray. Prohibited in Stage 2 restrictions |
| Evening (6pm-9pm) | Acceptable but not ideal | Lower evaporation but wet blades overnight = Calgary lawn fungus risk (especially in humid August) |
| Stage 2 restriction allowed times | 6am-9am or 6pm-9pm only | City bylaw — $250 fine for violation |
Rachio 3 smart controllers automatically water in the early morning window and skip during rain or high wind. J.G. Irrigation programs all newly installed Calgary systems to begin watering at 4-5am for optimal performance. Call 587-433-4795 to get your system programmed for the ideal Calgary watering window.
Calgary Controller Programming — Optimal Watering Time Built In
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