Climate of Denver, United States

Dfa

Köppen-Geiger climate classification: Dfa — Cold, no dry season, hot summer.

Denver has a mean annual temperature of 10.3 °C and receives 405 mm of precipitation per year (1991–2020 climate normals). The warmest month is July with a mean temperature of 23.1 °C, while December is the coldest month at -0.7 °C. Most precipitation falls in May (65 mm); the driest month is January (14 mm).

Climate Diagram

Climate diagram for Denver: monthly mean temperature (red line, left axis, °C) and monthly precipitation (blue bars, right axis, mm), 1991–2020 0 0 10 20 20 40 30 60 40 80 °C mm J F M A M J J A S O N D

Walter–Lieth diagram: blue bars show monthly precipitation (right axis, mm), the red line shows monthly mean temperature (left axis, °C). Scale: 1 °C ≡ 2 mm.

Climate Table

MonthMean temperature (°C)Precipitation (mm)
January-0.413.6
February0.815.8
March5.132.9
April8.648.2
May13.964.8
June19.742.8
July23.150.2
August21.941.7
September17.631.8
October10.426.6
November3.822.2
December-0.714.4
Year10.3404.9

Live Forecast

Looking for the current weather instead of climate averages? Open the live forecast diagrams in WZ Diagrams — 15 weather models, ensemble spread, radar and more.

Data Source

Climate normals and Köppen-Geiger classification: Beck et al. (2023), Scientific Data 10, 724, CC BY 4.0. Period 1991–2020. Classification resolution ≈ 1 km; monthly climate data resolution ≈ 1 km (0.01°, Original 2023 release; predates the January 2026 correction), sampled at the grid cell containing the city coordinates (39.74°, -104.99°). Climate normals describe the long-term average, not current weather.