Best time to visit Trier
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 Trier
6 top-rated tours via Viator. Booking links earn this site a commission at no cost to you. Map locations are approximate (centred on Trier).
- 1
Trier Private Walking Tour With A Professional Guide - 2
Private Walking Tour of Germany’s Oldest City Trier - 3
Fairytale Lanes Self-Audio Guided Tour at Bernkastel-Kues - 4
Bicycle Picnic Boat Tour with E Bike from to Traben Trarbach - 5
For the love of Riesling - Mosel Wine tour - 6
Explore Trier's City Highlights with a Local
Last refreshed 2026-06-24.
Similar climatesVianden98% · Heidelberg97% · Luxembourg City97%
Other destinations with the most-alike year-round climate to Trier (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 Trier'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 | 1–6 | 2 | 14 | 190 | 13.6 | 84% | 20 | 71 | 1 | Quiet | 3 |
| Feb | 3–9 | 5 | 14 | 188 | 13.4 | 77% | 23 | 105 | 1 | Quiet | 4 |
| Mar | 3–12 | 8 | 12 | 170 | 14.2 | 67% | 19 | 175 | 2 | Quiet | 5 |
| Apr | 5–15 | 12 | 11 | 137 | 12.5 | 60% | 19 | 222 | 3 | Quiet | 6 |
| May | 9–19 | 17 | 12 | 152 | 12.7 | 61% | 18 | 260 | 5 | Quiet | 7 |
| Jun | 14–24 | 23 | 11 | 115 | 10.5 | 56% | 16 | 263 | 6 | Quiet | 8 |
| Jul | 14–25 | 24 | 12 | 126 | 10.5 | 55% | 18 | 269 | 5 | Quiet | 8 |
| Aug | 15–25 | 25 | 12 | 122 | 10.2 | 58% | 17 | 255 | 5 | Peak | 8 |
| Sep | 12–21 | 21 | 11 | 124 | 11.3 | 64% | 15 | 212 | 4 | Busy | 8 |
| Oct | 9–16 | 15 | 14 | 169 | 12.1 | 77% | 19 | 141 | 2 | Moderate | 6 |
| Nov | 5–10 | 7 | 14 | 174 | 12.4 | 83% | 18 | 90 | 1 | Peak | 4 |
| Dec | 3–7 | 3 | 17 | 205 | 12.1 | 87% | 19 | 51 | 1 | Busy | 3 |
UV Index in Trier by Month
UV index in Trier peaks at 6 (moderate) in June, dropping to 1 (low) in January.
Best months in detail
June
8/1014–24°C · 11 rain days (115h) · 263 sun hours · 56% humidity · Quiet crowd · UV 6 (moderate) · sunniest 1 in 10 days reach 8 (high)
July
8/1014–25°C · 12 rain days (126h) · 269 sun hours · 55% humidity · Quiet crowd · UV 5 (moderate) · sunniest 1 in 10 days reach 7 (high)
August
8/1015–25°C · 12 rain days (122h) · 255 sun hours · 58% humidity · Peak crowd · UV 5 (moderate) · sunniest 1 in 10 days reach 7 (high)
Every month
Show the other 9 months in detail
January
3/101–6°C (feels 2°C) · 14 rain days (190h) · 71 sun hours · 84% humidity · Quiet crowd · UV 1 (low)
February
4/103–9°C (feels 5°C) · 14 rain days (188h) · 105 sun hours · 77% humidity · Quiet crowd · UV 1 (low)
March
5/103–12°C (feels 8°C) · 12 rain days (170h) · 175 sun hours · 67% humidity · Quiet crowd · UV 2 (low) · sunniest 1 in 10 days reach 3 (moderate)
April
6/105–15°C (feels 12°C) · 11 rain days (137h) · 222 sun hours · 60% humidity · Quiet crowd · UV 3 (moderate) · sunniest 1 in 10 days reach 5 (moderate)
May
7/109–19°C (feels 17°C) · 12 rain days (152h) · 260 sun hours · 61% humidity · Quiet crowd · UV 5 (moderate) · sunniest 1 in 10 days reach 6 (high)
September
8/1012–21°C · 11 rain days (124h) · 212 sun hours · 64% humidity · Busy crowd · UV 4 (moderate) · sunniest 1 in 10 days reach 5 (moderate)
October
6/109–16°C (feels 15°C) · 14 rain days (169h) · 141 sun hours · 77% humidity · Moderate crowd · UV 2 (low)
November
4/105–10°C (feels 7°C) · 14 rain days (174h) · 90 sun hours · 83% humidity · Peak crowd · UV 1 (low)
December
3/103–7°C (feels 3°C) · 17 rain days (205h) · 51 sun hours · 87% humidity · Busy crowd · UV 1 (low)
Frequently asked questions about visiting Trier
When is the best time to visit Trier?
June is the highest-scoring month (8/10 on the Holiday Climate Index). Typical conditions: 14–24°C (11 rainy days). The top three months by score are June, July, August.
What is the worst time to visit Trier?
December is the lowest-scoring month (3/10). Typical conditions: 3–7°C (17 rainy days).
When are crowds lowest in Trier?
Search-interest seasonality (Google Trends 2021-2025) is lowest in January and peaks in November. 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 Trier have good weather but fewer tourists?
June (climate 8/10, crowd index 0) and July (climate 8/10, crowd index 21) — shoulder months with above-average climate and below-median search-interest. Often the best value-for-weather trade.
What is the UV index in Trier by month?
UV peaks at 6 (moderate) in June and is lowest in January at 1 (low). Monthly peak values: Jan 1, Feb 1, Mar 2, Apr 3, May 5, Jun 6, Jul 5, Aug 5, Sep 4, Oct 2, Nov 1, Dec 1.
What is the UV index in Trier in June?
June is the peak UV month in Trier, with a daily-peak UV index of 6 (moderate). Standard sun protection — sunglasses and light SPF — is recommended.
How high can UV get in Trier 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 6 (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, April, May, June, July, August, September. Plan sun protection for the worst case, not the average.
Is air quality in Trier bad for travelers?
PM2.5 (fine-particle pollution) exceeds the WHO sensitive-group guideline (15 µg/m³) in 4 months: January, February, March, December. The worst month is March with a typical-day mean of 11 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.