Colorado weather by county

Colorado in September 2026

• 64 of 64 counties ran at least 1° warmer than usual in September 2026, and 0 ran at least 1° cooler.
• Warmest against its own records: Adams County (1st-warmest September of 132). Even the least warm, Archuleta County, had its 20th-warmest.
• Wettest September against its records: Baca County, 5.4 inches (1st-wettest).
• 57 of 64 counties were in moderate drought or worse on NOAA's Palmer reading for September.
• Since 1970 the state's counties have warmed about 0.5° per decade on average, Alamosa County the most at 0.7°.

This week's forecast against the usual, and every month since 1895, for all 64 counties in Colorado. 59 had a top-10 warm September in 2026.

• Adams County 1st warmest Sep
• Alamosa County 2nd warmest Sep
• Arapahoe County 1st warmest Sep
• Archuleta County 20th warmest Sep
• Baca County 3rd warmest Sep
• Bent County 3rd warmest Sep
• Boulder County 1st warmest Sep
• Broomfield County 1st warmest Sep
• Chaffee County 8th warmest Sep
• Cheyenne County 1st warmest Sep
• Clear Creek County 7th warmest Sep
• Conejos County 4th warmest Sep
• Costilla County 8th warmest Sep
• Crowley County 2nd warmest Sep
• Custer County 2nd warmest Sep
• Delta County 10th warmest Sep
• Denver County 1st warmest Sep
• Dolores County 9th warmest Sep
• Douglas County 1st warmest Sep
• Eagle County 5th warmest Sep
• El Paso County 2nd warmest Sep
• Elbert County 2nd warmest Sep
• Fremont County 2nd warmest Sep
• Garfield County 7th warmest Sep
• Gilpin County 7th warmest Sep
• Grand County 5th warmest Sep
• Gunnison County 5th warmest Sep
• Hinsdale County 13th warmest Sep
• Huerfano County 5th warmest Sep
• Jackson County 8th warmest Sep
• Jefferson County 1st warmest Sep
• Kiowa County 2nd warmest Sep
• Kit Carson County 1st warmest Sep
• La Plata County 14th warmest Sep
• Lake County 10th warmest Sep
• Larimer County 1st warmest Sep
• Las Animas County 3rd warmest Sep
• Lincoln County 2nd warmest Sep
• Logan County 1st warmest Sep
• Mesa County 7th warmest Sep
• Mineral County 10th warmest Sep
• Moffat County 7th warmest Sep
• Montezuma County 9th warmest Sep
• Montrose County 8th warmest Sep
• Morgan County 1st warmest Sep
• Otero County 2nd warmest Sep
• Ouray County 10th warmest Sep
• Park County 2nd warmest Sep
• Phillips County 1st warmest Sep
• Pitkin County 6th warmest Sep
• Prowers County 2nd warmest Sep
• Pueblo County 2nd warmest Sep
• Rio Blanco County 7th warmest Sep
• Rio Grande County 4th warmest Sep
• Routt County 6th warmest Sep
• Saguache County 5th warmest Sep
• San Juan County 17th warmest Sep
• San Miguel County 11th warmest Sep
• Sedgwick County 1st warmest Sep
• Summit County 6th warmest Sep
• Teller County 1st warmest Sep
• Washington County 1st warmest Sep
• Weld County 1st warmest Sep
• Yuma County 1st warmest Sep

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