Amherst, CO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Amherst, a community in Phillips County, Colorado.
Tonight
28°F
Clear
Clear, with a low around 28. Northwest wind around 9 mph, with gusts as high as 16 mph.
7-day forecast for Amherst
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 28°F | Clear | 9 mph NW | 7% |
| Wednesday | 56°F | Sunny | 6 to 12 mph NW | 1% |
| Wednesday Night | 32°F | Mostly Cloudy | 6 to 10 mph NNW | 0% |
| Thursday | 54°F | Mostly Sunny | 2 to 10 mph NNW | 0% |
| Thursday Night | 28°F | Mostly Clear | 3 mph W | 0% |
| Friday | 57°F | Mostly Sunny | 5 mph W | 1% |
| Friday Night | 31°F | Mostly Clear | 3 to 7 mph W | 2% |
| Saturday | 60°F | Sunny | 3 to 12 mph WNW | 2% |
| Saturday Night | 31°F | Clear | 2 to 7 mph W | 2% |
| Sunday | 65°F | Sunny | 9 mph SW | 0% |
| Sunday Night | 38°F | Clear | 7 to 10 mph WSW | 0% |
| Monday | 63°F | Sunny | 3 to 10 mph N | 0% |
| Monday Night | 36°F | Partly Cloudy | 6 mph SSE | 0% |
| Tuesday | 61°F | Mostly Sunny | 6 to 9 mph WSW | 1% |
Forecast source: National Weather Service (api.weather.gov) for Amherst (40.683, -102.173). Updated through the day.
Growing snapshot for Amherst
Last spring frost
May 11
First fall frost
Oct 3
Growing season
144 days
Hardiness zone
5b
More local growing data for Amherst: nearby ZIP 80721 weather · frost dates · planting calendar · Colorado frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Holyoke, Co (14 mi from Amherst). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.