The most comfortable time to visit Denver is from August to early October, and again from late May to early July. For sun, aim for July to August; for walking, go from late April to May.
When to go five ratings · thirty-six ten-day sections · click a cell to read it
For sun, go from July to August. It peaks in mid July, at 71. Avoid October to mid May for this: it falls to 0, mostly because it is too cool. The clearest skies come in September, when the sky is typically 33% covered at midday (mostly clear).
The being outside season here runs from August to early October, with a second spell from late May to early July. It peaks in mid September, at 80. The weakest stretch is from December to early March, when it drops to 0, mostly because it is too cold.
For walking, go from late April to May, with a second spell from late September to October. It peaks in late May, at 73. Avoid early and mid January for this: it falls to 10, mostly because it is too cold.
The year, measured
The average temperature in Denver over the whole year is 10°C. July is the hottest month, with highs of about 29°C; January is the coldest, with lows of about -5°C. Denver has no sharply defined rainy season: the chance of rain on a given day runs from 18% in January, the driest month, to 31% in May, the wettest. Winds in Denver are highest in April, averaging 3.6 m/s (13 km/h), and lightest in September, at 2.7 m/s (10 km/h). The prevailing wind is from the NE. The clearest skies in Denver come in September, when the sky is typically 32% covered; May is the cloudiest month, at 50%.
Month by month Denver climate by month: average temperatures year round · click a month to read it
| Month | High | Low | Feels like | Chance of rain | Cloud | Wind | Being outside | Sun | Walking |
|---|---|---|---|---|---|---|---|---|---|
| January | 4°C | -5°C | -1°C | 18% | 40% | 2.8 m/s | 0 | 0 | 13 |
| February | 5°C | -4°C | -1°C | 22% | 41% | 3.3 m/s | 1 | 0 | 20 |
| March | 10°C | -1°C | 4°C | 21% | 46% | 3.5 m/s | 7 | 0 | 38 |
| April | 14°C | 3°C | 8°C | 23% | 47% | 3.6 m/s | 23 | 0 | 56 |
| May | 18°C | 9°C | 14°C | 31% | 50% | 3.3 m/s | 49 | 4 | 70 |
| June | 26°C | 15°C | 23°C | 24% | 38% | 3.1 m/s | 70 | 39 | 45 |
| July | 29°C | 18°C | 27°C | 22% | 35% | 3.1 m/s | 54 | 68 | 18 |
| August | 28°C | 16°C | 25°C | 21% | 36% | 2.9 m/s | 65 | 60 | 27 |
| September | 25°C | 11°C | 21°C | 28% | 32% | 2.7 m/s | 72 | 31 | 53 |
| October | 16°C | 5°C | 12°C | 25% | 34% | 2.9 m/s | 43 | 1 | 67 |
| November | 10°C | 0°C | 5°C | 20% | 33% | 2.9 m/s | 13 | 0 | 44 |
| December | 6°C | -3°C | 1°C | 22% | 34% | 3.0 m/s | 1 | 0 | 24 |
High and low are the warmest and coolest of four readings a day — midnight, 6am, noon and 6pm — so a true overnight low can sit a degree or two under them. Chance of rain, cloud and wind are the day’s average; feels-like and the three ratings (each out of 100: Good from 55, Ideal from 80) are read at midday.
Seasons, and the year in short Denver weather by season
Year round, Denver has days of about 4°C at their warmest in January, its coolest month, and 29°C in July, its warmest; the coolest hours of the day run from -5°C to 18°C through the year, and the average temperature over the year is 10°C around the clock. Rain is most likely around May and least likely around January. Every figure here is a decade of observations blended into one representative year, so it reads as what this date is usually like, not a forecast for one particular day.
Denver weather in winterDecember to February
Winter in Denver has typical daily highs of about 5°C and lows of about -4°C, with a 21% chance of rain on a given day.
Denver weather in springMarch to May
Spring in Denver has typical daily highs of about 14°C and lows of about 4°C, with a 25% chance of rain on a given day.
Denver weather in summerJune to August
Summer in Denver has typical daily highs of about 28°C and lows of about 16°C, with a 23% chance of rain on a given day.
Denver weather in autumnSeptember to November
Autumn in Denver has typical daily highs of about 17°C and lows of about 5°C, with a 24% chance of rain on a given day.
When is the rainy season in Denver?
Denver has no sharply defined rainy season: the chance of rain on a given day runs from 18% in January, the driest month, to 31% in May, the wettest.
What time of year is Denver windiest?
Winds in Denver are highest in April, averaging 3.6 m/s (13 km/h), and lightest in September, at 2.7 m/s (10 km/h). The prevailing wind is from the NE.
What is the average temperature in Denver year round?
The average temperature in Denver over the whole year is 10°C. July is the hottest month, with highs of about 29°C; January is the coldest, with lows of about -5°C.
Where to go instead in early January, the weakest time here for being outside
How this is worked out
Every figure is a decade of weather-station observations blended into one typical year, in ten-day sections. The ratings, the chart and the feels-like column are read at midday local solar time. Being outside is the Easy outdoors rating, Sun is Sunbathing and Walking is Active outdoors, each out of 100: Good from 55, Ideal from 80. They describe what a time of year is usually like here, not a forecast. The dotted links open the map at that time of year; set its time of day to midday to see these numbers.