Jamestown Weather Forecast
- 67
- 87
Chance Thunderstorms
- 62
- 84
Thunderstorms Likely
- 61
- 80
Rain Showers
- 60
- 80
Rain Showers
- 61
- 81
Thunderstorms Likely
- 60
- 81
Chance Thunderstorms
Today 26 Jul Larimer and Boulder Counties Between 6000 and 9000 Feet
Partly cloudy in the Morning, then mostly cloudy with a slight chance of Thunderstorms early in the afternoon. Mostly cloudy with a chance of Thunderstorms late in the afternoon. Highs 85 to 95. Chance of precipitation 40 percent.
Tonight 26 Jul Larimer and Boulder Counties Between 6000 and 9000 Feet
Mostly cloudy. Slight chance of Thunderstorms in the Evening, then a slight chance of Showers after midnight. Lows 59 to 69. Chance of rain 20 percent.
Jamestown Temperature Statistics
July Temperature
Boulder Municipal Airport (9.9 miles)
Lowest 1 July, 2026
55.4 °FAverage July
78.2 °FHighest 20 July, 2026
100.4 °F
Climate (2021–2026)
Boulder Municipal Airport (9.9 miles)
Average Low 2021–2026
41.2 °FAverage 2021–2026
53.6 °FAverage High 2021–2026
66.3 °F