What August feels like in Denver
Late summer arrives in Denver with August. Afternoons are hot, so sightseeing works best in the morning or evening. The day–night swing is wide (about 15°C (27°F)): nights stay mild, so mornings and evenings feel very different from midday. Moderate humidity keeps the air pleasant.
Rain in Denver in August
Rain turns up now and then — about one day in 5. Each rainy day adds about 5.7 mm (0.2 in), a proper wetting rather than a sprinkle. Across the year Denver averages about 5.7 mm per rainy day, so August is typical.
Daylight and sunshine in August
Mid-month, Denver gets 13 h 47 min of daylight, from sunrise near 6:11 am to sunset near 7:58 pm. Evenings are drawing in — 57 min less daylight than mid-July. About 89% of daylight hours are sunny; in short, skies are mostly clear.
How August compares to the rest of the year
Ranked by average high, August comes out as the 2nd warmest month in Denver. Afternoons run 1°C (1.8°F) cooler than in July, with 4 mm less rain. The cooling trend carries on into September. September averages a high of 26.2°C (79.2°F).
Who August suits
- Sightseeing: a good fit — daytime temperatures are fine for walking around.
- Parks & outdoor: less ideal — afternoons are too warm to linger outside.
- Hiking: less ideal — too hot for long hikes.
Tips for visiting Denver in August
Versatile Layers
Mornings and evenings are cooler than midday, so dress in layers.
Sun Protection
Sunscreen, a hat and sunglasses; light breathable clothes.
Quick questions
How warm is Denver in August?
It feels hot: typical highs are 29.9°C (85.8°F), with lows near 14.9°C (58.8°F).
Does it rain a lot in Denver in August?
Only moderately: roughly 6 wet days and 34 mm, usually moderate rain.
What should I wear in Denver in August?
Based on the averages: versatile layers and sun protection. Bring something extra for the cooler evenings.
Is August or September better for visiting Denver?
September scores better on our climate ranking (#1 of 12 vs #3), rated Great against Good. September is cooler and has fewer rainy days.