Bow Mar, CO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Bow Mar, a town in Jefferson County, Colorado.
Overnight
60°F
Patchy Smoke
Patchy smoke and a slight chance of rain showers. Mostly cloudy. Low around 60, with temperatures rising to around 63 overnight. North northeast wind 8 to 12 mph, with gusts as high as 18 mph. Chance of precipitation is 20%.
7-day forecast for Bow Mar
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 60°F | Patchy Smoke | 8 to 12 mph NNE | 20% |
| Tuesday | 81°F | Patchy Smoke | 8 mph ENE | 22% |
| Tuesday Night | 58°F | Patchy Smoke | 2 to 8 mph NNE | 11% |
| Wednesday | 88°F | Patchy Smoke then Sunny | 2 to 8 mph NNE | 0% |
| Wednesday Night | 61°F | Mostly Clear | 3 to 8 mph SSE | 4% |
| Thursday | 96°F | Sunny | 2 to 9 mph NNW | 0% |
| Thursday Night | 63°F | Clear | 5 to 9 mph S | 2% |
| Friday | 98°F | Sunny | 5 to 8 mph E | 0% |
| Friday Night | 68°F | Mostly Clear | 9 mph SSE | 1% |
| Saturday | 100°F | Sunny | 8 mph NE | 0% |
| Saturday Night | 68°F | Partly Cloudy | 9 mph S | 0% |
| Sunday | 99°F | Sunny | 5 to 8 mph ESE | 8% |
| Sunday Night | 69°F | Partly Cloudy | 8 mph W | 2% |
| Monday | 98°F | Sunny | 6 to 10 mph NW | 14% |
Forecast source: National Weather Service (api.weather.gov) for Bow Mar (39.627, -105.051). Updated through the day.
Growing snapshot for Bow Mar
Last spring frost
May 2
First fall frost
Oct 11
Growing season
160 days
Hardiness zone
6a
More local growing data for Bow Mar: nearby ZIP 80123 weather · frost dates · planting calendar · Colorado frost dates
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Climate data from the nearest NOAA station, Marston Fltr Plt, Co (0.4 mi from Bow Mar). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.