Mount Rainier, MD 20018 Frost Dates
When can you plant in Mount Rainier, MD?
Around 03/29 is the usual last spring frost, about 213 days away. The first fall frost typically arrives around 11/08, about 224 frost-free days later.
Mount Rainier sits in USDA Zone 7b (5 to 10°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
What to do before the first frost
About 10 weeks of growing season left in Mount Rainier before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
How much risk comes with planting early here
03/29 is the middle of 30 years of NOAA records, not a promise. Plant by 03/15 and you're betting against frost in roughly 9 years out of 10. 04/11 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Mount Rainier compares
About 224 days separate Mount Rainier's last and first frost, putting it 11,810 of 40,283 ZIP codes nationally. Within MD, it ranks 118 of 583.
Learn more
the frost range covers how to read the range around Mount Rainier's dates instead of trusting one. local microclimates covers what one yard in Mount Rainier can differ from the 20018 normal.