In September, Denver averages a high of 78°F (26°C) and a low of 48°F (9°C). Most runs feel like about 63°F (17°C) once you factor in a typical morning or evening start, so dress for that number rather than the thermometer. Altitude, sun, and dry air mean big day-to-night temperature swings in Denver.
78°F (26°C)
48°F (9°C)
Feels like 63°F (17°C)
Almost any time works this month. Early mornings are coolest if you prefer to avoid the 78°F (26°C) afternoon high.
Short Sleeve Tech Shirt
Breathable running tee
Running Shorts
Lightweight with built-in brief
Running Shoes
Your regular training shoes
$85
$50
$349
$17
$16
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In September, Denver runs feel like about 63°F (17°C). A short or long-sleeve tech shirt with shorts or light tights is ideal. Carry a packable layer if it is windy.
September is some of the best running weather of the year in Denver, with average highs near 78°F (26°C) and lows near 48°F (9°C).
Shorts are the standard in Denver in September. At feels-like 63°F (17°C) tights will leave you overheating.
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