Ione Mushroom Calendar

Ione sits in the Northern Rockies and a moderately damp climate — about 28.2 inches of rain a year. The ground warms and reaches early fruiting potential around April, by which point the average last frost (May 4) has usually passed. Summer dries out — August typically sees under an inch of rain — and fruiting goes quiet until the rains return in September, kicking off the year's main flush. Winter then shuts the season down hard and early.

Best months May, September, and October
Ground warms ~April
Frost-free May 4 – Oct 4
Annual rain 28.2"
Driest August
Species tracked 9

What Fruits When Near Ione

JFMAMJJASONDMorelSpring KingKing BoleteMatsutakeChanterelleOysterBear's HeadThe PrinceShaggy Mane

Shading shows when each species typically fruits within about 10 miles, not abundance. Based on iNaturalist observation trends.

The Shape of the Season

All species combined — local observations within about 10 miles, by month.

Weather Through the Year

Average daily high–low (°F)

Average monthly precipitation (inches)

The Forest Around Ione

Dominant tree species within about 10 km — the hosts that shape which mushrooms grow here.

  • Douglas-fir55.6%
  • Western Hemlock18%
  • Grand Fir13.6%
  • Lodgepole Pine10.1%
  • Ponderosa Pine2.8%

Species to Know Near Ione

Morel Morel Peaks in May Shaggy Mane Shaggy Mane Peaks in September Photo: Jeremy Collison (CC BY-NC) King Bolete King Bolete Peaks in May and September

Common Questions

When is mushroom season in Ione?

Mushroom season near Ione comes in two waves: a spring window after snowmelt and a larger fall window with the first soaking rains. The strongest months in the local observation record are May, September, and October.

When do morels fruit near Ione?

Morel reports near Ione peak in May. Timing tracks soil temperature, so south-facing slopes and lower elevations start earlier and higher ground runs later.

What mushrooms grow near Ione?

9 species show up in the observation record within about 10 miles of Ione, including Morel, Spring King, King Bolete, Matsutake, Chanterelle, Oyster, Bear's Head, The Prince. The calendar above shows when each one typically fruits.

Want live conditions instead of climatology? The Forayz map layers soil moisture, soil temperature, snow cover, and recent burns over the same area.

Nearby Calendars in Washington

Climate normals: NOAA NCEI U.S. Climate Normals (1991–2020). Season-onset timing is an air-temperature proxy, not a soil reading.