Boise Mushroom Calendar
Boise has a notably dry climate — about 11.5 inches of rain a year, most of it falling in the cool months from fall into spring. The ground warms and reaches early fruiting potential around March, by which point the average last frost (Apr 24) has usually passed. Summer dries out — June through September typically see under an inch of rain — and fruiting goes quiet until the rains return in October, kicking off the year's main flush. The first frosts around Oct 21 eventually close the main season, though hardy cool-season species hang on.
Best months
April, May, and October
Ground warms
~March
Frost-free
Apr 24 – Oct 21
Annual rain
11.5"
Driest
June through September
Species tracked
7
What Fruits When Near Boise
JFMAMJJASONDMorelKing BoleteOysterBear's HeadBlewitThe 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)
Track the Season as It Happens
This calendar shows typical timing. A free Salish Mushrooms account adds live environmental layers — soil moisture, soil temperature, snow cover, and recent precipitation — on the Forayz map.
Species to Know Near Boise
Common Questions
When is mushroom season in Boise?
Mushroom season near Boise 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 April, May, and October.
When do morels fruit near Boise?
Morel reports near Boise peak in April. Timing tracks soil temperature, so south-facing slopes and lower elevations start earlier and higher ground runs later.
What mushrooms grow near Boise?
7 species show up in the observation record within about 10 miles of Boise, including Morel, King Bolete, Oyster, Bear's Head, Blewit, The Prince, Shaggy Mane. 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.