Larkspur, CO Weather & Growing Conditions
Today
72°F
Mostly Sunny then Chance Showers And Thunderstorms
A chance of showers and thunderstorms after 1pm. Mostly sunny. High near 72, with temperatures falling to around 61 in the afternoon. Southwest wind 3 to 7 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 72°F | Mostly Sunny then Chance Showers And Thunderstorms | 3 to 7 mph SW | 44% |
| Tonight | 46°F | Chance Showers And Thunderstorms then Partly Cloudy | 6 mph WSW | 42% |
| Sunday | 67°F | Mostly Sunny then Chance Showers And Thunderstorms | 3 to 8 mph SW | 53% |
| Sunday Night | 46°F | Chance Showers And Thunderstorms | 1 to 7 mph NW | 46% |
| Monday | 68°F | Mostly Sunny | 1 to 12 mph SSE | 8% |
| Monday Night | 48°F | Chance Showers And Thunderstorms | 14 mph S | 38% |
| Tuesday | 70°F | Mostly Sunny then Chance Showers And Thunderstorms | 6 to 14 mph S | 28% |
| Tuesday Night | 48°F | Chance Showers And Thunderstorms then Mostly Cloudy | 9 to 13 mph S | 33% |
| Wednesday | 71°F | Partly Sunny then Slight Chance Showers And Thunderstorms | 6 to 10 mph S | 22% |
| Wednesday Night | 49°F | Chance Showers And Thunderstorms then Mostly Cloudy | 2 to 7 mph SSW | 28% |
| Thursday | 71°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 2 to 8 mph E | 19% |
| Thursday Night | 50°F | Slight Chance Rain Showers then Mostly Cloudy | 8 mph S | 24% |
| Friday | 71°F | Mostly Sunny then Chance Showers And Thunderstorms | 6 to 12 mph S | 32% |
| Friday Night | 50°F | Chance Rain Showers | 7 to 12 mph S | 36% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Larkspur, CO
Last spring frost
May 14
First fall frost
Oct 1
Growing season
138 days
Hardiness zone
5b
Explore more for Larkspur, CO: full frost dates · planting calendar · Colorado frost dates
Climate data from the nearest NOAA station, Monument, Co (6.1 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.