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

59°F

Patchy Smoke

Patchy smoke. Mostly cloudy. Low around 59, with temperatures rising to around 62 overnight. North northeast wind around 12 mph, with gusts as high as 18 mph.

7-day forecast for Fort Lupton

When	Temp	Forecast	Wind	Precip
Overnight	59°F	Patchy Smoke	12 mph NNE	9%
Tuesday	79°F	Patchy Smoke	8 to 12 mph ENE	7%
Tuesday Night	56°F	Patchy Smoke	5 to 13 mph ENE	9%
Wednesday	87°F	Patchy Smoke	5 to 10 mph NE	0%
Wednesday Night	58°F	Patchy Smoke then Mostly Clear	3 to 12 mph S	1%
Thursday	97°F	Sunny	3 to 8 mph N	0%
Thursday Night	61°F	Mostly Clear	5 to 8 mph SSW	1%
Friday	99°F	Sunny	3 to 8 mph SSE	0%
Friday Night	66°F	Mostly Clear	7 to 10 mph S	0%
Saturday	102°F	Sunny	3 to 8 mph NNW	1%
Saturday Night	65°F	Partly Cloudy	6 to 9 mph W	1%
Sunday	101°F	Sunny	3 to 8 mph NNW	5%
Sunday Night	66°F	Partly Cloudy	5 to 9 mph W	5%
Monday	100°F	Sunny	5 to 12 mph N	12%

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

More local growing data for Fort Lupton: nearby ZIP 80621 weather · frost dates · planting calendar · Colorado frost dates

Nearby towns & communities

Aristocrat Ranchettes Ault Berthoud Briggsdale Dacono Eaton Erie Evans Firestone Frederick Garden City Gilcrest Greeley Grover Hudson Johnstown Keenesburg Kersey La Salle Mead Milliken Nunn Orchard Pierce Platteville Raymer (New Raymer) Severance Windsor

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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 Aug 4, 2026.