Lafayette, CO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Lafayette, a city in Boulder County, Colorado.
This Afternoon
83°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms. Mostly cloudy. High near 83, with temperatures falling to around 74 in the afternoon. Southwest wind around 7 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Lafayette
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 83°F | Chance Showers And Thunderstorms | 7 mph SW | 45% |
| Tonight | 54°F | Chance Showers And Thunderstorms then Partly Cloudy | 3 to 7 mph WSW | 31% |
| Saturday | 75°F | Partly Sunny then Chance Showers And Thunderstorms | 2 to 7 mph WNW | 67% |
| Saturday Night | 49°F | Chance Showers And Thunderstorms | 5 mph W | 53% |
| Sunday | 71°F | Showers And Thunderstorms Likely | 1 to 5 mph NE | 55% |
| Sunday Night | 48°F | Chance Showers And Thunderstorms then Partly Cloudy | 1 to 5 mph S | 34% |
| Monday | 74°F | Mostly Sunny | 1 to 6 mph NE | 2% |
| Monday Night | 50°F | Mostly Clear | 1 to 6 mph NNW | 10% |
| Tuesday | 76°F | Mostly Sunny | 1 to 5 mph NE | 13% |
| Tuesday Night | 52°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 5 mph WSW | 19% |
| Wednesday | 77°F | Partly Sunny | 2 to 6 mph NNE | 14% |
| Wednesday Night | 52°F | Slight Chance Rain Showers then Mostly Cloudy | 3 mph S | 18% |
| Thursday | 77°F | Mostly Sunny | 2 to 6 mph NNE | 14% |
| Thursday Night | 53°F | Chance Rain Showers then Mostly Cloudy | 1 to 5 mph SSW | 28% |
Forecast source: National Weather Service (api.weather.gov) for Lafayette (39.995, -105.100). Updated through the day.
Growing snapshot for Lafayette
Last spring frost
May 6
First fall frost
Oct 5
Growing season
151 days
Hardiness zone
6a
More local growing data for Lafayette: nearby ZIP 80026 weather · frost dates · planting calendar · Colorado frost dates
Nearby towns & communities
Allenspark
Altona
Bark Ranch
Bonanza Mountain Estates
Boulder
Coal Creek
Crisman
Eldorado Springs
Glendale
Gold Hill
Gunbarrel
Hidden Lake
Jamestown
Lazy Acres
Leyner
Longmont
Louisville
Lyons
Mountain Meadows
Nederland
Niwot
Paragon Estates
Pine Brook Hill
Seven Hills
St. Ann Highlands
Sugarloaf
Sunshine
Superior
Tall Timber
Valmont
Climate data from the nearest NOAA station, Boulder, Co (8.9 mi from Lafayette). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 18, 2026.