Denver, Colorado weather in May

Averages from 2021–2025 (155 days of record).

Average high: 70°F
Average low: 43°F
Rainy days: ~12 per month
Total precipitation: 3.5 in
Warmest recorded: 89°F
Coldest recorded: 28°F

Expect May days in Denver, Colorado to top out around 70°F and cool to about 43°F overnight, with roughly 12 days of measurable rain across the month. In recent years May has ranged from 28°F to 89°F.

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Current Denver, Colorado forecast → · Historical data by Open-Meteo (ERA5).