Best time to visit Denver
Re-score for me — drag the dial — every chart on the page recolours live for your heat limit 27°C
Default 27 °C is the upper edge of the Holiday Climate Index "ideal comfort" band (Scott, Rutty, Amelung & Tang, 2016). Above this, most warm-tourism travellers report measurable discomfort.
Greyed factors are scored normally — extreme heat overrides them, so a clear sky or low rain can't lift the period.
Greyed factors are scored normally — extreme heat overrides them, so a clear sky or low rain can't lift the period.
Greyed factors are scored normally — extreme heat overrides them, so a clear sky or low rain can't lift the period.
Greyed factors are scored normally — extreme heat overrides them, so a clear sky or low rain can't lift the period.
How is this scored? HCI / Steadman / CCI gate — full methodology and citations below.
Compare with another destination
Add as many as you like — stacked below the main strips above. Each row is just the recent-window score strip and (for beach destinations) sea-temperature strip.
Tours in Denver
30 top-rated tours via Viator. Booking links earn this site a commission at no cost to you. Map locations are approximate (centred on Denver).
- 1
Best of Denver Bus Tour: Highlights, Views & Local Favorites - 2
Small Group Tour of Pikes Peak and the Garden of the Gods from Denver - 3
Rocky Mountain National Park in Summer Tour from Denver - 4
Shared Half-Day Mountain Tour in Red Rocks Evergreen and Echo Lake - 5
Visit Red Rocks Park, Continental Divide & Breckenridge - 6
Rocky Mountain National Park and Estes Park Tour from Denver Winter and Spring - 7
Denver and Foothills Mountain Small-Group Tour - 8
Breckenridge Ultimate Full Day Mountain Tour from Denver - 9
Wild West Walking Tour - 10
Denver's Beer and Graffiti Walking Tour - 11
Pikes Peak and Garden of the Gods Small Group Tour - 12
Red Rocks & Denver Foothills Scenic Tour - 13
Small-Group Tour of the Rocky Mountain National Park from Denver - 14
Mount Blue Sky Summit Experience & Red Rocks Tour - 15
Ultimate Denver Day Out Bus Tour: Red Rocks, City Sites & Sweets - 16
Colorado Gold Rush Mountain and Mine Half-Day Tour from Denver - 17
Mount Blue Sky, Clear Creek Canyon & Red Rocks Park (Mount Evans) - 18
Red Rocks Express Tour from Denver: Views and Photo Opportunities - 19
Private 4 Hour - Red Rocks & Denver Foothills Scenic Tour - 20
Rocky Mountain National Park - Private Sightseeing Tour - 21
Discover Rocky Mountain National Park-Small Group Tour & Picnic - 22
Downtown Denver Food Tour - 23
Private Pikes Peak COG Railway, Manitou & Garden of the Gods - 24
Red Rocks & Beyond - 25
Rocky Mountain Escape - Scenic Views and Nature Walks - 26
Rocky Mountain 6-Zipline Adventure on CO Longest and Fastest! - 27
2 Hour LoDo Historic Walking Tour in Denver - 28
Rocky Mountain National Park Guided Hiking Adventure - 29
Denver Craft Beer Tour in Lower Downtown - 30
Rocky Mountain National Park Guided Small Group Tour
Last refreshed 2026-10-18.
Similar climatesGöreme92% · Ürgüp91% · Ankara90%
Other destinations with the most-alike year-round climate to Denver (apparent temperature, rain hours, sunshine — matched within the same trip-profile). The ±N chip compares each match's typical score for the current month against Denver's. Based on the 2020-2024 climatology, not this year's actual weather.
Month-by-month
| Month | Temp °C | Feels °C | Rain days | Rain h | Rain h/day | Humidity | Wind km/h | Sun h | UV | Interest | Score |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Jan | -9–5 | 0 | 4 | 63 | 15.8 | 49% | 16 | 179 | 2 | Quiet | 5 |
| Feb | -11–5 | 0 | 7 | 86 | 12.3 | 50% | 18 | 188 | 4 | Quiet | 5 |
| Mar | -5–10 | 6 | 9 | 91 | 10.1 | 43% | 18 | 222 | 5 | Moderate | 6 |
| Apr | 0–16 | 12 | 7 | 84 | 12.0 | 33% | 20 | 240 | 7 | Moderate | 7 |
| May | 6–22 | 18 | 10 | 101 | 10.1 | 37% | 21 | 267 | 8 | Peak | 8 |
| Jun | 13–29 | 26 | 7 | 58 | 8.3 | 30% | 21 | 278 | 9 | Busy | 9 |
| Jul | 16–32 | 30 | 6 | 39 | 6.5 | 27% | 21 | 300 | 10 | Quiet | 7 |
| Aug | 16–32 | 30 | 6 | 37 | 6.2 | 27% | 20 | 280 | 9 | Quiet | 7 |
| Sep | 11–28 | 25 | 5 | 39 | 7.8 | 24% | 18 | 248 | 7 | Moderate | 9 |
| Oct | 4–20 | 16 | 3 | 30 | 10.0 | 28% | 17 | 228 | 5 | Moderate | 8 |
| Nov | -3–12 | 8 | 5 | 53 | 10.6 | 35% | 16 | 189 | 3 | Moderate | 7 |
| Dec | -5–8 | 4 | 4 | 43 | 10.8 | 38% | 16 | 181 | 2 | Busy | 6 |
UV Index in Denver by Month
UV index in Denver peaks at 10 (very high) in July, dropping to 2 (low) in December. June, July, August reach very high or extreme levels — apply SPF 50+, wear a hat and protective clothing, and limit direct sun between 11:00 and 17:00.
Best months in detail
June
9/1013–29°C (feels 26°C) · 7 rain days (58h) · 278 sun hours · 30% humidity · Busy crowd · UV 9 (very high) · sunniest 1 in 10 days reach 11 (extreme)
September
9/1011–28°C (feels 25°C) · 5 rain days (39h) · 248 sun hours · 24% humidity · Moderate crowd · UV 7 (high) · sunniest 1 in 10 days reach 8 (very high)
October
8/104–20°C (feels 16°C) · 3 rain days (30h) · 228 sun hours · 28% humidity · Moderate crowd · UV 5 (moderate) · sunniest 1 in 10 days reach 6 (high)
Every month
Show the other 9 months in detail
January
5/10-9–5°C (feels 0°C) · 4 rain days (63h) · 179 sun hours · 49% humidity · Quiet crowd · UV 2 (low)
February
5/10-11–5°C (feels 0°C) · 7 rain days (86h) · 188 sun hours · 50% humidity · Quiet crowd · UV 4 (moderate)
March
6/10-5–10°C (feels 6°C) · 9 rain days (91h) · 222 sun hours · 43% humidity · Moderate crowd · UV 5 (moderate) · sunniest 1 in 10 days reach 7 (high)
April
7/100–16°C (feels 12°C) · 7 rain days (84h) · 240 sun hours · 33% humidity · Moderate crowd · UV 7 (high) · sunniest 1 in 10 days reach 8 (very high)
May
8/106–22°C (feels 18°C) · 10 rain days (101h) · 267 sun hours · 37% humidity · Peak crowd · UV 8 (high) · sunniest 1 in 10 days reach 9 (very high)
July
7/1016–32°C (feels 30°C) · 6 rain days (39h) · 300 sun hours · 27% humidity · Quiet crowd · UV 10 (very high) · sunniest 1 in 10 days reach 11 (extreme)
August
7/1016–32°C (feels 30°C) · 6 rain days (37h) · 280 sun hours · 27% humidity · Quiet crowd · UV 9 (very high)
November
7/10-3–12°C (feels 8°C) · 5 rain days (53h) · 189 sun hours · 35% humidity · Moderate crowd · UV 3 (low) · sunniest 1 in 10 days reach 4 (moderate)
December
6/10-5–8°C (feels 4°C) · 4 rain days (43h) · 181 sun hours · 38% humidity · Busy crowd · UV 2 (low)
Frequently asked questions about visiting Denver
When is the best time to visit Denver?
June is the highest-scoring month (9/10 on the Holiday Climate Index). Typical conditions: 13–29°C (7 rainy days). The top three months by score are June, September, October.
What is the worst time to visit Denver?
February is the lowest-scoring month (5/10). Typical conditions: -11–5°C (7 rainy days).
Is Denver too hot in summer?
1 month (July) trip the heat deal-breaker in our scoring: apparent temperature crosses the comfort cap, so even with clear skies and low rain the score is held down. Plan around it if heat tolerance is low.
When are crowds lowest in Denver?
Search-interest seasonality (Google Trends 2021-2025) is lowest in February and peaks in May. Interest tracks both in-trip visitors and lead-time planners, so treat it as a "destination is on people's minds" signal rather than literal arrivals.
Which months in Denver have good weather but fewer tourists?
September (climate 9/10, crowd index 44) and April (climate 7/10, crowd index 47) — shoulder months with above-average climate and below-median search-interest. Often the best value-for-weather trade.
What is the UV index in Denver by month?
UV peaks at 10 (very high) in July and is lowest in December at 2 (low). Monthly peak values: Jan 2, Feb 4, Mar 5, Apr 7, May 8, Jun 9, Jul 10, Aug 9, Sep 7, Oct 5, Nov 3, Dec 2. June, July, August reach very high or extreme levels — apply SPF 50+, wear a hat and protective clothing, and limit direct sun between 11:00 and 17:00.
What is the UV index in Denver in July?
July is the peak UV month in Denver, with a daily-peak UV index of 10 (very high). At this level, sunburn can occur in under 20 minutes on unprotected fair skin. Apply SPF 50+, wear protective clothing and a hat, and avoid direct midday sun (11:00–17:00).
How high can UV get in Denver on the sunniest days?
Most days look like the monthly average, but on the sunniest ~1 in 10 days UV climbs higher than the mean suggests. June is the worst case: typical days average UV 9 (very high), but the top 10% of days reach UV 11 (extreme) — and even higher. Months where the sunniest days routinely exceed the typical reading: March, April, May, June, July, September, October, November. Plan sun protection for the worst case, not the average.
Is air quality in Denver bad for travelers?
PM2.5 (fine-particle pollution) exceeds the WHO sensitive-group guideline (15 µg/m³) in 3 months: January, February, December. The worst month is January with a typical-day mean of 12 µg/m³ (moderate); on the worst 10% of days PM2.5 reaches 19 µg/m³ (unhealthy for sensitive) and higher. People with asthma, heart conditions, or sensitive children may want to avoid these months or limit outdoor activity. Source: CAMS via Open-Meteo.