Soil temperature in Windsor, Ontario
Soil temperature
28.4°C83°F
at 6cm — germination depth
Cooling over the next 11 days.
Too warm to seed — the soil is heat-stressed. Wait for it to cool.
Most cool-season lawns in the northern US and Canada are bluegrass, tall fescue, or a mix of the two. We assume that, and use12.5°C as the seeding threshold.
I know what grass I have
The differences are small. Ryegrass is the quickest off the mark; bluegrass is the slowest and wants the warmest soil. Everything else sits between.
| Species | Soil temp | Days |
|---|---|---|
| Perennial ryegrass | 8°C | 5–10 |
| Red / chewings fescue | 8–10°C | 10–14 |
| Tall fescuelikely yours | 10–12°C | 10–14 |
| Browntop bentColonial bentgrass | 10–12°C | 14–21 |
| Smooth-stalked meadow grassKentucky bluegrasslikely yours | 12–13°C | 14–28 |
Soil temperature at 6cm in Windsor, Ontario is currently 28.4°C, and falling about 26.1°C over the next 11 days. That depth matters because it is where grass seed sits and where roots start working, and it lags air temperature by days — which is why a warm afternoon here tells you very little on its own.
Lawns in this area are typically Kentucky bluegrass with tall fescue, the usual mix for cool-season lawns at this latitude. That blend needs the soil to hold above 12.5°C before seed germinates reliably. Too warm to seed — the soil is heat-stressed. Wait for it to cool.
7 of the next 10 days are good mowing days. The best weekend slot right now is Sunday 10am–8pm, on the basis that ground soft in places — 31mm rain over the last week.
The next recommended window in Windsor opens at 8pm on Tuesday 1 September, and holds while conditions stay put. Underfoot, the ground reads as soft in places after 19mm rain over the last week.
The next 10 days
Column height is how mowable the day is; the lighter band is the best stretch within it. The line is soil temperature at 6cm. It crosses the seeding threshold inside this forecast.
12.5°C — seeding
Soil at 6cm 28.4°C cooling to 0.0°C
Tuesday 1 September: Good. 8pm–9pm — ground soft in places — 19mm rain over the last week
Tuesday 1 September · 8pm–9pmConfident
8pm–9pm — ground soft in places — 19mm rain over the last week
- Good:Grass wetness
- Grass dryno rain since Sunday
- Good:Ground firmness
- Ground soft in places19mm rain over the last week
- Good:Growth
- Growing wellgrowth potential 0.52
- Poor:Temperature
- Heat stress28°C
- Good:Wind
- Wind light17 km/h
- Sociable hours
- Your neighbours will remember it
Limiting factor:ground firmness
Wednesday 2 September: Good. 8am–11am — ground soft in places — 19mm rain over the last week
Wednesday 2 September · 8am–11amConfident
8am–11am — ground soft in places — 19mm rain over the last week
- Good:Grass wetness
- Grass dryno rain since Sunday
- Marginal:Ground firmness
- Ground soft in places19mm rain over the last week
- Marginal:Growth
- Growing slowlygrowth potential 0.35
- Poor:Temperature
- Cool24°C
- Good:Wind
- Wind light13 km/h
- Sociable hours
- A bit early or late, but finestarts when it stops being antisocial
Limiting factor:ground firmness
Thursday 3 September: Good. No — ground waterlogged.
Thursday 3 SeptemberConfident
No — ground waterlogged.
- Marginal:Grass wetness
- Grass dryrain earlier today
- Marginal:Ground firmness
- Ground soft in places19mm rain over the last week
- Good:Growth
- Growing steadilygrowth potential 0.50
- Poor:Temperature
- Temperature22°C
- Good:Wind
- Wind light9 km/h
Limiting factor:grass wetness
Friday 4 September: Not worth it. No — ground waterlogged.
Friday 4 SeptemberConfident
No — ground waterlogged.
- Marginal:Grass wetness
- Grass dryrain earlier today
- Marginal:Ground firmness
- Ground soft in places27mm rain over the last week
- Good:Growth
- Growing wellgrowth potential 0.86
- Good:Temperature
- Temperature22°C
- Good:Wind
- Wind light7 km/h
Limiting factor:ground firmness
Saturday 5 September: Good. 6pm–8pm — ground soft in places — 31mm rain over the last week
Saturday 5 September · 6pm–8pmReasonably confident
6pm–8pm — ground soft in places — 31mm rain over the last week
- Good:Grass wetness
- Grass dryrain earlier today
- Marginal:Ground firmness
- Ground soft in places31mm rain over the last week
- Good:Growth
- Growing wellgrowth potential 0.98
- Good:Temperature
- Temperature17°C
- Good:Wind
- Wind light7 km/h
- Sociable hours
- A bit early or late, but finestarts when it stops being antisocial
Limiting factor:ground firmness
Sunday 6 September: Good. 10am–8pm — ground soft in places — 31mm rain over the last week
Sunday 6 September · 10am–8pmReasonably confident
10am–8pm — ground soft in places — 31mm rain over the last week
- Good:Grass wetness
- Grass dryno rain since Friday
- Marginal:Ground firmness
- Ground soft in places31mm rain over the last week
- Good:Growth
- Growing wellgrowth potential 0.99
- Good:Temperature
- Temperature19°C
- Good:Wind
- Wind light8 km/h
- Sociable hours
- Fine by the neighboursstarts when it stops being antisocial
Limiting factor:ground firmness
Monday 7 September: Good. 8am–3pm — ground soft in places — 12mm rain over the last week
Monday 7 September · 8am–3pmReasonably confident
8am–3pm — ground soft in places — 12mm rain over the last week
- Good:Grass wetness
- Grass dryno rain since Friday
- Good:Ground firmness
- Ground soft in places12mm rain over the last week
- Good:Growth
- Growing wellgrowth potential 0.95
- Marginal:Temperature
- Temperature18°C
- Good:Wind
- Wind light6 km/h
- Sociable hours
- A bit early or late, but finestarts at first light
Limiting factor:ground firmness
Tuesday 8 September: Good. 8am–8pm — ground soft in places — 12mm rain over the last week
Tuesday 8 September · 8am–8pmReasonably confident
8am–8pm — ground soft in places — 12mm rain over the last week
- Good:Grass wetness
- Grass dryno rain since Friday
- Good:Ground firmness
- Ground soft in places12mm rain over the last week
- Good:Growth
- Growing wellgrowth potential 0.87
- Good:Temperature
- Temperature20°C
- Good:Wind
- Wind light8 km/h
- Sociable hours
- A bit early or late, but finestarts at first light
Limiting factor:ground firmness
Wednesday 9 September: Not worth it. No — ground frozen.
Wednesday 9 SeptemberLow confidence this far out
No — ground frozen.
- Good:Grass wetness
- Grass dryno rain since Friday
- Good:Ground firmness
- Ground firm12mm rain over the last week
- Good:Growth
- Growing wellgrowth potential 0.96
- Good:Temperature
- Temperature19°C
- Good:Wind
- Wind light12 km/h
Limiting factor:none
Thursday 10 September: Not worth it. No — ground frozen.
Thursday 10 SeptemberLow confidence this far out
No — ground frozen.
- Good:Grass wetness
- Grass dryrain earlier today
- Good:Ground firmness
- Ground firm12mm rain over the last week
- Good:Growth
- Growing wellgrowth potential 0.88
- Good:Temperature
- Temperature21°C
- Good:Wind
- Wind light20 km/h
Limiting factor:none
Nearby
Your own postcode
These are town-centre figures. Yours will differ a little.