The lawn-mowing weather app
Knowday watches the dry grass, the firm ground, and the closing dry window, then just tells you when today is a good day to mow.
Today · your lawn
What matters for mowing
Mow before the rain
Knowday spots the closing dry window. Rain starts Thursday — so it tells you to catch today, not guess at the radar.
Dry grass, firm ground
Mowing a soggy lawn clumps, ruts, and tears the grass. Knowday models the soil near you and calls a hard Skip when the ground's too soft to hold the mower.
How fast it's drying out
After rain, Knowday reads how fast the lawn is drying — slow, normal, or fast — so you know whether it's a day or two until it's mow-ready.
Too hot to cut
Cutting in real heat stresses the grass. Pushing 90°, Knowday says cut high and easy — or wait for cooler air.
How it works
It models the soil moisture, the last day's rain, the dry window before the next rain, the heat, and the wind — and reads how fast the lawn's drying after a soak.
Everything is modeled near you, not measured in your yard, so shady low corners stay wet longer than the read suggests. And let the morning dew burn off first — wet grass clumps and clogs the deck.
Mowing is one of fourteen plans Knowday reads — walks and rides, the lawn, the garden, camping, the night sky, and the water.
See all plansNo catch
Free to use. No sign-up. Your location is only used to fetch your forecast.