Best time to visit Cologne
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.
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 Cologne
12 top-rated tours via Viator. Booking links earn this site a commission at no cost to you. Map locations are approximate (centred on Cologne).
- 1
Aachen Private Walking Tour With A Professional Guide - 2
Cologne Private Walking Tour With A Professional Guide - 3
Private Vacation Photoshoot with Photographer in Cologne - 4
Gothic Elegance Photoshoot at Cologne Cathedral - 5
Cologne 2 Hours Guided Bike Ride to the Top 5 Highlights - 6
Exclusive E Bike Tour of Cologne with Guide in Small Group - 7
Best of Cologne in 1-Day Private Guided Tour with Transport - 8
Cologne Old Town Highlights Private Guided Walking Tour - 9
Cologne: EL-DE Haus and Old Town Private Guided Tour - 10
Jewish Quarter History Walking Tour in Cologne’s Old Town - 11
Cologne EL-DE Haus and WWII Jewish Holocaust History Tour - 12
Private German Beer Tasting Tour in Cologne Old Town
Last refreshed 2026-05-27.
Similar climatesHamburg93% · Amsterdam92% · Versailles92%
Other destinations with the most-alike year-round climate to Cologne (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 Cologne'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 | 2–6 | 3 | 14 | 189 | 13.5 | 81% | 21 | 81 | 1 | Quiet | 3 |
| Feb | 3–10 | 6 | 15 | 179 | 11.9 | 73% | 24 | 105 | 1 | Quiet | 4 |
| Mar | 3–12 | 8 | 14 | 160 | 11.4 | 66% | 20 | 173 | 2 | Quiet | 5 |
| Apr | 5–14 | 11 | 12 | 146 | 12.2 | 60% | 19 | 206 | 3 | Quiet | 6 |
| May | 9–19 | 17 | 14 | 146 | 10.4 | 58% | 18 | 256 | 4 | Quiet | 7 |
| Jun | 14–24 | 23 | 12 | 118 | 9.8 | 56% | 17 | 260 | 5 | Quiet | 8 |
| Jul | 15–24 | 23 | 14 | 148 | 10.6 | 57% | 18 | 258 | 5 | Quiet | 8 |
| Aug | 16–25 | 25 | 12 | 125 | 10.4 | 59% | 16 | 251 | 5 | Moderate | 8 |
| Sep | 13–21 | 21 | 11 | 114 | 10.4 | 63% | 15 | 211 | 3 | Moderate | 8 |
| Oct | 9–17 | 15 | 15 | 146 | 9.7 | 73% | 19 | 140 | 2 | Quiet | 6 |
| Nov | 5–11 | 8 | 13 | 146 | 11.2 | 79% | 18 | 101 | 1 | Peak | 5 |
| Dec | 3–7 | 4 | 17 | 197 | 11.6 | 84% | 19 | 62 | 1 | Peak | 3 |
UV Index in Cologne by Month
UV index in Cologne peaks at 5 (moderate) in June, dropping to 1 (low) in January.
Best months in detail
June
8/1014–24°C · 12 rain days (118h) · 260 sun hours · 56% humidity · Quiet crowd · UV 5 (moderate) · sunniest 1 in 10 days reach 8 (high)
August
8/1016–25°C · 12 rain days (125h) · 251 sun hours · 59% humidity · Moderate crowd · UV 5 (moderate) · sunniest 1 in 10 days reach 6 (high)
September
8/1013–21°C · 11 rain days (114h) · 211 sun hours · 63% humidity · Moderate crowd · UV 3 (moderate) · sunniest 1 in 10 days reach 5 (moderate)
Every month
Show the other 9 months in detail
January
3/102–6°C (feels 3°C) · 14 rain days (189h) · 81 sun hours · 81% humidity · Quiet crowd · UV 1 (low)
February
4/103–10°C (feels 6°C) · 15 rain days (179h) · 105 sun hours · 73% humidity · Quiet crowd · UV 1 (low)
March
5/103–12°C (feels 8°C) · 14 rain days (160h) · 173 sun hours · 66% humidity · Quiet crowd · UV 2 (low) · sunniest 1 in 10 days reach 3 (moderate)
April
6/105–14°C (feels 11°C) · 12 rain days (146h) · 206 sun hours · 60% humidity · Quiet crowd · UV 3 (moderate)
May
7/109–19°C (feels 17°C) · 14 rain days (146h) · 256 sun hours · 58% humidity · Quiet crowd · UV 4 (moderate) · sunniest 1 in 10 days reach 6 (moderate)
July
8/1015–24°C · 14 rain days (148h) · 258 sun hours · 57% humidity · Quiet crowd · UV 5 (moderate) · sunniest 1 in 10 days reach 7 (high)
October
6/109–17°C (feels 15°C) · 15 rain days (146h) · 140 sun hours · 73% humidity · Quiet crowd · UV 2 (low)
November
5/105–11°C (feels 8°C) · 13 rain days (146h) · 101 sun hours · 79% humidity · Peak crowd · UV 1 (low)
December
3/103–7°C (feels 4°C) · 17 rain days (197h) · 62 sun hours · 84% humidity · Peak crowd · UV 1 (low)
Frequently asked questions about visiting Cologne
When is the best time to visit Cologne?
June is the highest-scoring month (8/10 on the Holiday Climate Index). Typical conditions: 14–24°C (12 rainy days). The top three months by score are June, August, September.
What is the worst time to visit Cologne?
December is the lowest-scoring month (3/10). Typical conditions: 3–7°C (17 rainy days).
When are crowds lowest in Cologne?
Search-interest seasonality (Google Trends 2021-2025) is lowest in January and peaks in December. 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 Cologne have good weather but fewer tourists?
June (climate 8/10, crowd index 17) and July (climate 8/10, crowd index 16) — shoulder months with above-average climate and below-median search-interest. Often the best value-for-weather trade.
What is the UV index in Cologne by month?
UV peaks at 5 (moderate) in June and is lowest in January at 1 (low). Monthly peak values: Jan 1, Feb 1, Mar 2, Apr 3, May 4, Jun 5, Jul 5, Aug 5, Sep 3, Oct 2, Nov 1, Dec 1.
What is the UV index in Cologne in June?
June is the peak UV month in Cologne, with a daily-peak UV index of 5 (moderate). Standard sun protection — sunglasses and light SPF — is recommended.
How high can UV get in Cologne 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 5 (moderate), but the top 10% of days reach UV 8 (high) — and even higher. Months where the sunniest days routinely exceed the typical reading: March, May, June, July, August, September. Plan sun protection for the worst case, not the average.
Is air quality in Cologne bad for travelers?
PM2.5 (fine-particle pollution) exceeds the WHO sensitive-group guideline (15 µg/m³) in 7 months: January, February, March, April, October, November, December. The worst month is March with a typical-day mean of 14 µg/m³ (moderate); on the worst 10% of days PM2.5 reaches 25 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.