Soil temperature in Elmira, New York

Soil temperature

72°F22.3°C

at 6cm — germination depth

Cooling over the next 11 days.

Seeding conditions are open — soil is 22.3°C at 6cm and holding above 12.5°C.

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.

Soil temperature at 6cm for reliable germination. Sources onthe method page.
SpeciesSoil tempDays
Perennial ryegrass8°C5–10
Red / chewings fescue8–10°C10–14
Tall fescuelikely yours10–12°C10–14
Browntop bentColonial bentgrass10–12°C14–21
Smooth-stalked meadow grassKentucky bluegrasslikely yours12–13°C14–28

Soil temperature at 6cm in Elmira, New York is currently 22.3°C, and falling about 20.8°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. Seeding conditions are open — soil is 22.3°C at 6cm and holding above 12.5°C.

7 of the next 10 days are good mowing days. The other 3 are held back by wet grass or soft ground. The best weekend slot right now is Saturday 1pm–3pm, on the basis that dried off since a shower 1 hour ago, ground firm.

The next recommended window in Elmira opens at 8am on Wednesday 2 September, because anything earlier is the hour your neighbours will remember. Underfoot, the ground reads as firm after 3mm rain over the last week.

See the full mowing forecast for Elmira

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 21.5°C cooling to 0.0°C

Tuesday 1 September: Not worth it. No — cool, 25°C.

Tuesday 1 SeptemberConfident

No — cool, 25°C.

Good:Grass wetness
Grass dryrain earlier today
Good:Ground firmness
Ground firm3mm rain over the last week
Good:Growth
Growing wellgrowth potential 0.83
Good:Temperature
Temperature22°C
Good:Wind
Wind light1 km/h

Limiting factor:temperature

Wednesday 2 September: Good. 8am–8pm — rain earlier today, ground firm

Wednesday 2 September · 8am–8pmConfident

8am–8pm — rain earlier today, ground firm

Good:Grass wetness
Grass dryrain earlier today
Good:Ground firmness
Ground firm6mm rain over the last week
Good:Growth
Growing wellgrowth potential 0.79
Marginal:Temperature
Temperature21°C
Good:Wind
Wind light9 km/h
Sociable hours
A bit early or late, but finestarts when it stops being antisocial

Limiting factor:none

Thursday 3 September: Good. midday–2pm — grass dry — rain earlier today

Thursday 3 September · midday–2pmConfident

midday–2pm — grass dry — rain earlier today

Poor:Grass wetness
Grass dryrain earlier today
Good:Ground firmness
Ground soft in places6mm rain over the last week
Good:Growth
Growing wellgrowth potential 0.80
Marginal:Temperature
Temperature21°C
Good:Wind
Wind light6 km/h
Sociable hours
Fine by the neighboursstarts once the dew has burnt off

Limiting factor:grass wetness

Friday 4 September: Good. midday–8pm — grass dry — dried off since a shower 2 hours ago

Friday 4 September · midday–8pmConfident

midday–8pm — grass dry — dried off since a shower 2 hours ago

Marginal:Grass wetness
Grass drydried off since a shower 2 hours ago
Good:Ground firmness
Ground firm30mm rain over the last week
Good:Growth
Growing wellgrowth potential 0.96
Good:Temperature
Temperature19°C
Good:Wind
Wind light3 km/h
Sociable hours
Fine by the neighboursstarts once the rain has passed

Limiting factor:grass wetness

Saturday 5 September: Good. 1pm–3pm — dried off since a shower 1 hour ago, ground firm

Saturday 5 September · 1pm–3pmReasonably confident

1pm–3pm — dried off since a shower 1 hour ago, ground firm

Good:Grass wetness
Grass drydried off since a shower 0 hours ago
Good:Ground firmness
Ground firm30mm rain over the last week
Good:Growth
Growing wellgrowth potential 0.79
Good:Temperature
Temperature13°C
Good:Wind
Wind light8 km/h
Sociable hours
Fine by the neighboursstarts once the rain has passed

Limiting factor:none

Sunday 6 September: Good. 10am–8pm — rain earlier today, ground firm

Sunday 6 September · 10am–8pmReasonably confident

10am–8pm — rain earlier today, ground firm

Good:Grass wetness
Grass dryrain earlier today
Good:Ground firmness
Ground firm31mm rain over the last week
Good:Growth
Growing wellgrowth potential 0.72
Good:Temperature
Temperature11°C
Good:Wind
Wind light5 km/h
Sociable hours
Fine by the neighboursstarts once the dew has burnt off

Limiting factor:none

Monday 7 September: Good. 10am–8pm — no rain since Saturday, ground firm

Monday 7 September · 10am–8pmReasonably confident

10am–8pm — no rain since Saturday, ground firm

Good:Grass wetness
Grass dryno rain since Saturday
Good:Ground firmness
Ground firm31mm rain over the last week
Good:Growth
Growing wellgrowth potential 0.82
Good:Temperature
Temperature11°C
Good:Wind
Wind light3 km/h
Sociable hours
Fine by the neighboursstarts once the dew has burnt off

Limiting factor:none

Tuesday 8 September: Good. 8am–8pm — no rain since Saturday, ground firm

Tuesday 8 September · 8am–8pmReasonably confident

8am–8pm — no rain since Saturday, ground firm

Good:Grass wetness
Grass dryno rain since Saturday
Good:Ground firmness
Ground firm28mm rain over the last week
Good:Growth
Growing wellgrowth potential 0.97
Good:Temperature
Temperature17°C
Good:Wind
Wind light4 km/h
Sociable hours
A bit early or late, but finestarts when it stops being antisocial

Limiting factor:none

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 Saturday
Good:Ground firmness
Ground firm25mm rain over the last week
Good:Growth
Growing wellgrowth potential 0.76
Good:Temperature
Temperature11°C
Good:Wind
Wind light1 km/h

Limiting factor:grass wetness

Thursday 10 September: Not worth it. No — ground frozen.

Thursday 10 SeptemberLow confidence this far out

No — ground frozen.

Marginal:Grass wetness
Grass drydried off since a shower 0 hours ago
Good:Ground firmness
Ground firm26mm rain over the last week
Good:Growth
Growing wellgrowth potential 0.97
Good:Temperature
Temperature20°C
Good:Wind
Wind light14 km/h

Limiting factor:grass wetness

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