Jamestown Weather Forecast
- 57
- 82
Chance Thunderstorms
- 56
- 76
Chance Thunderstorms
- 59
- 79
Mostly Sunny
- 64
- 88
Mostly Sunny
- 61
- 88
Slight Chance Thunderstorms
- 56
- 75
Chance Thunderstorms
Today 30 Jul Larimer and Boulder Counties Between 6000 and 9000 Feet
Partly cloudy in the Morning, then mostly cloudy with a chance of Thunderstorms early in the afternoon. Mostly cloudy with a slight chance of Thunderstorms late in the afternoon. Highs 78 to 88. Northwest Winds 10 to 15 Mph in the afternoon. Chance of precipitation 30 percent.
Tonight 30 Jul Larimer and Boulder Counties Between 6000 and 9000 Feet
Partly cloudy. Slight chance of Thunderstorms in the evening. Lows 49 to 59. Chance of precipitation 20 percent.
Jamestown Temperature Statistics
July Temperature
Boulder Municipal Airport (9.9 miles)
Lowest 1 July, 2026
55.4 °FAverage July
78.9 °FHighest 25 July, 2026
102.2 °F
Climate (2021–2026)
Boulder Municipal Airport (9.9 miles)
Average Low 2021–2026
41.3 °FAverage 2021–2026
53.7 °FAverage High 2021–2026
66.3 °F