Powell County, Montana · Frost dates
Powell County frost dates.
First-frost, last-frost, and growing-season length for Powell County, Montana. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 4b
32°F — light freeze
Last spring frost
- 10%
- —
- 20%
- —
- 50%
- —
- 80%
- —
- 90%
- —
First fall frost
- 10%
- —
- 20%
- —
- 50%
- —
- 80%
- —
- 90%
- —
28°F — killing freeze
Last spring freeze
- 10%
- 06-18
- 20%
- 06-07
- 50%
- 05-26
- 80%
- 05-16
- 90%
- 05-11
First fall freeze
- 10%
- 08-30
- 20%
- 09-02
- 50%
- 09-11
- 80%
- 09-20
- 90%
- 09-25
Growing season length (days, 28°F threshold)
- Short year
- 73
- Median
- 108
- Long year
- 137
Source NOAA station
OVANDO 9 SSE, MT US
6.5 mi · 30 yrs of record (1991–2020) · 4325 ft elev.
Data from OVANDO 9 SSE, MT US, 6.5 miles away with 30-year NOAA record (1991-2020).
Bield Farm earns its predictions.
14-day free trial. No credit card. Cancel anytime.