10-Day Weather Forecast - Johnstown, CO

Areas of smoke in the morning. Mostly sunny in the morning then mostly cloudy with a slight chance of thunderstorms in the afternoon. Highs around 90. Chance of precipitation 20 percent.

Mostly cloudy with a slight chance of thunderstorms in the evening then partly cloudy after midnight. Lows in the lower to mid 50s. Chance of precipitation 20 percent.

Mostly sunny. Highs in the upper 80s. North winds 10 to 15 mph with gusts up to 20 mph.

Mostly clear. Lows in the 50s.

Mostly clear. Highs in the mid 90s. Lows in the mid to upper 50s.

Mostly clear. Highs in the mid 90s. Lows in the mid to upper 50s.

Partly cloudy. Highs in the upper 90s.

Mostly clear. Lows 56 to 62.

Partly cloudy. Highs in the mid to upper 90s. Lows near 60.

Partly cloudy. Highs in the mid to upper 90s. Lows near 60.

Partly cloudy. Highs in the mid to upper 90s. Lows near 60.

Partly cloudy. Highs in the mid to upper 90s. Lows near 60.

Partly cloudy. Highs in the mid to upper 90s. Lows near 60.

Partly cloudy. Low temperature around 62F. Dew point will be around 51F with an average humidity of 50%. Winds will be 3 mph from the NW.

Partly cloudy with a chance of rain. Chance of precipitation 40%. High temperature around 90F. Dew point will be around 53F with an average humidity of 42%. Winds will be 4 mph from the E.

Partly cloudy. Low temperature around 58F. Dew point will be around 54F with an average humidity of 63%. Winds will be 5 mph from the N.

Mostly sunny. High temperature around 84F. Dew point will be around 56F with an average humidity of 55%. Winds will be 5 mph from the E.

Mostly cloudy. Low temperature around 57F. Dew point will be around 55F with an average humidity of 69%. Winds will be 5 mph from the E.