Lafayette, CO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Lafayette, a city in Boulder County, Colorado.
Today
79°F
Patchy Smoke
Patchy smoke and a slight chance of rain showers. Mostly sunny. High near 79, with temperatures falling to around 77 in the afternoon. East northeast wind 5 to 9 mph. Chance of precipitation is 20%.
7-day forecast for Lafayette
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 79°F | Patchy Smoke | 5 to 9 mph ENE | 15% |
| Tonight | 56°F | Patchy Smoke | 5 to 8 mph NE | 10% |
| Wednesday | 87°F | Patchy Smoke | 3 to 8 mph NE | 0% |
| Wednesday Night | 58°F | Mostly Clear | 3 to 8 mph N | 2% |
| Thursday | 95°F | Sunny | 2 to 8 mph NNW | 0% |
| Thursday Night | 61°F | Mostly Clear | 3 to 7 mph SW | 1% |
| Friday | 98°F | Sunny | 2 to 8 mph S | 0% |
| Friday Night | 65°F | Mostly Clear | 8 mph S | 0% |
| Saturday | 100°F | Sunny | 2 to 8 mph N | 2% |
| Saturday Night | 65°F | Partly Cloudy | 5 to 8 mph W | 0% |
| Sunday | 99°F | Sunny | 3 to 9 mph NNE | 8% |
| Sunday Night | 67°F | Partly Cloudy | 5 to 9 mph WNW | 4% |
| Monday | 98°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 5 to 10 mph N | 23% |
| Monday Night | 66°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 3 to 10 mph WNW | 16% |
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 Aug 4, 2026.