Fort Lupton, CO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Fort Lupton, a city in Weld County, Colorado.
Overnight
33°F
Mostly Clear
Mostly clear, with a low around 33. Southwest wind around 3 mph.
7-day forecast for Fort Lupton
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 33°F | Mostly Clear | 3 mph SW | 0% |
| Wednesday | 57°F | Partly Sunny | 2 to 7 mph ESE | 6% |
| Wednesday Night | 35°F | Mostly Cloudy | 2 to 6 mph NW | 6% |
| Thursday | 58°F | Sunny | 3 mph S | 0% |
| Thursday Night | 35°F | Partly Cloudy | 5 mph SSW | 1% |
| Friday | 58°F | Mostly Sunny | 5 mph N | 6% |
| Friday Night | 33°F | Mostly Clear | 3 mph WNW | 6% |
| Saturday | 59°F | Sunny | 3 mph ESE | 2% |
| Saturday Night | 34°F | Mostly Clear | 5 mph SSW | 0% |
| Sunday | 65°F | Sunny | 1 to 5 mph SSE | 0% |
| Sunday Night | 37°F | Mostly Clear | 5 mph SW | 0% |
| Monday | 64°F | Sunny | 1 to 5 mph ESE | 0% |
| Monday Night | 36°F | Partly Cloudy | 3 mph SW | 0% |
| Tuesday | 64°F | Mostly Sunny | 2 mph SE | 0% |
Forecast source: National Weather Service (api.weather.gov) for Fort Lupton (40.083, -104.806). Updated through the day.
Growing snapshot for Fort Lupton
Last spring frost
May 3
First fall frost
Oct 7
Growing season
155 days
Hardiness zone
5b
More local growing data for Fort Lupton: nearby ZIP 80621 weather · frost dates · planting calendar · Colorado frost dates
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Severance
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Climate data from the nearest NOAA station, Brighton 3 Se, Co (11.5 mi from Fort Lupton). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.