Milliken, CO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Milliken, a town in Weld County, Colorado.
This Afternoon
80°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms. Mostly cloudy. High near 80, with temperatures falling to around 74 in the afternoon. Northeast wind around 8 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Milliken
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 80°F | Chance Showers And Thunderstorms | 8 mph NE | 51% |
| Tonight | 50°F | Chance Showers And Thunderstorms | 1 to 8 mph WSW | 39% |
| Sunday | 69°F | Chance Showers And Thunderstorms | 2 to 7 mph NNE | 40% |
| Sunday Night | 48°F | Slight Chance Rain Showers then Partly Cloudy | 1 to 7 mph NNW | 21% |
| Monday | 73°F | Sunny | 1 to 9 mph NE | 1% |
| Monday Night | 48°F | Partly Cloudy | 2 to 9 mph NE | 5% |
| Tuesday | 78°F | Mostly Sunny | 2 to 6 mph NE | 1% |
| Tuesday Night | 52°F | Partly Cloudy | 3 to 7 mph NE | 12% |
| Wednesday | 80°F | Partly Sunny | 6 mph NNE | 4% |
| Wednesday Night | 52°F | Mostly Cloudy | 5 mph NNW | 7% |
| Thursday | 82°F | Mostly Sunny | 2 to 9 mph NE | 3% |
| Thursday Night | 54°F | Partly Cloudy | 2 to 9 mph ENE | 6% |
| Friday | 81°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 2 to 9 mph S | 18% |
| Friday Night | 54°F | Slight Chance Rain Showers then Partly Cloudy | 3 to 9 mph S | 24% |
Forecast source: National Weather Service (api.weather.gov) for Milliken (40.311, -104.858). Updated through the day.
Growing snapshot for Milliken
Last spring frost
May 2
First fall frost
Oct 8
Growing season
159 days
Hardiness zone
5b
More local growing data for Milliken: nearby ZIP 80543 weather · frost dates · planting calendar · Colorado frost dates
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Climate data from the nearest NOAA station, Greeley Unc, Co (9.1 mi from Milliken). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.