Best time to visit Klagenfurt
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 Klagenfurt
6 top-rated tours via Viator. Booking links earn this site a commission at no cost to you. Map locations are approximate (centred on Klagenfurt).
- 1
Klagenfurt Scavenger Hunt and Sights Self-Guided Tour - 2
In-depth private tour through every corner of Klagenfurt - 3
Klagenfurt - Private Walking Tour - 4
Klagenfurt Private Walking Tour - 5
The Best of Klagenfurt: A Self-Guided Audio Tour - 6
Herzensjagd durch Klagenfurt (virtuelle Schnitzeljagd)
Last refreshed 2026-06-26.
Similar climatesGraz96% · Maribor95% · Vienna94%
Other destinations with the most-alike year-round climate to Klagenfurt (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 Klagenfurt'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 | -5–3 | 0 | 7 | 94 | 13.4 | 74% | 8 | 132 | 1 | Quiet | 5 |
| Feb | -3–8 | 5 | 5 | 71 | 14.2 | 64% | 10 | 160 | 2 | Quiet | 6 |
| Mar | 0–11 | 8 | 8 | 96 | 12.0 | 56% | 11 | 194 | 3 | Quiet | 6 |
| Apr | 3–15 | 12 | 8 | 112 | 14.0 | 53% | 12 | 222 | 4 | Quiet | 7 |
| May | 9–19 | 18 | 16 | 181 | 11.3 | 59% | 12 | 236 | 4 | Quiet | 7 |
| Jun | 14–25 | 25 | 13 | 129 | 9.9 | 57% | 11 | 267 | 6 | Quiet | 8 |
| Jul | 16–27 | 28 | 11 | 102 | 9.3 | 56% | 11 | 290 | 6 | Quiet | 8 |
| Aug | 16–26 | 27 | 11 | 116 | 10.5 | 60% | 10 | 254 | 6 | Peak | 8 |
| Sep | 11–21 | 21 | 11 | 125 | 11.4 | 63% | 9 | 212 | 4 | Moderate | 8 |
| Oct | 8–16 | 15 | 10 | 111 | 11.1 | 72% | 8 | 165 | 2 | Moderate | 7 |
| Nov | 1–8 | 6 | 9 | 90 | 10.0 | 78% | 7 | 126 | 1 | Busy | 5 |
| Dec | -3–3 | 0 | 10 | 128 | 12.8 | 81% | 7 | 103 | 1 | Busy | 4 |
UV Index in Klagenfurt by Month
UV index in Klagenfurt peaks at 6 (high) in July, dropping to 1 (low) in January. July have high UV — SPF 30+ and sunglasses recommended.
Best months in detail
July
8/1016–27°C (feels 28°C) · 11 rain days (102h) · 290 sun hours · 56% humidity · Quiet crowd · UV 6 (high) · sunniest 1 in 10 days reach 8 (high)
August
8/1016–26°C (feels 27°C) · 11 rain days (116h) · 254 sun hours · 60% humidity · Peak crowd · UV 6 (moderate) · sunniest 1 in 10 days reach 7 (high)
June
8/1014–25°C · 13 rain days (129h) · 267 sun hours · 57% humidity · Quiet crowd · UV 6 (moderate) · sunniest 1 in 10 days reach 8 (high)
Every month
Show the other 9 months in detail
January
5/10-5–3°C (feels 0°C) · 7 rain days (94h) · 132 sun hours · 74% humidity · Quiet crowd · UV 1 (low)
February
6/10-3–8°C (feels 5°C) · 5 rain days (71h) · 160 sun hours · 64% humidity · Quiet crowd · UV 2 (low)
March
6/100–11°C (feels 8°C) · 8 rain days (96h) · 194 sun hours · 56% humidity · Quiet crowd · UV 3 (low) · sunniest 1 in 10 days reach 4 (moderate)
April
7/103–15°C (feels 12°C) · 8 rain days (112h) · 222 sun hours · 53% humidity · Quiet crowd · UV 4 (moderate) · sunniest 1 in 10 days reach 6 (moderate)
May
7/109–19°C (feels 18°C) · 16 rain days (181h) · 236 sun hours · 59% humidity · Quiet crowd · UV 4 (moderate) · sunniest 1 in 10 days reach 6 (high)
September
8/1011–21°C · 11 rain days (125h) · 212 sun hours · 63% humidity · Moderate crowd · UV 4 (moderate) · sunniest 1 in 10 days reach 6 (moderate)
October
7/108–16°C · 10 rain days (111h) · 165 sun hours · 72% humidity · Moderate crowd · UV 2 (low) · sunniest 1 in 10 days reach 4 (moderate)
November
5/101–8°C (feels 6°C) · 9 rain days (90h) · 126 sun hours · 78% humidity · Busy crowd · UV 1 (low)
December
4/10-3–3°C (feels 0°C) · 10 rain days (128h) · 103 sun hours · 81% humidity · Busy crowd · UV 1 (low)
Frequently asked questions about visiting Klagenfurt
When is the best time to visit Klagenfurt?
July is the highest-scoring month (8/10 on the Holiday Climate Index). Typical conditions: 16–27°C (11 rainy days). The top three months by score are July, August, June.
What is the worst time to visit Klagenfurt?
December is the lowest-scoring month (4/10). Typical conditions: -3–3°C (10 rainy days).
When are crowds lowest in Klagenfurt?
Search-interest seasonality (Google Trends 2021-2025) is lowest in January and peaks in August. 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 Klagenfurt have good weather but fewer tourists?
June (climate 8/10, crowd index 0) and July (climate 8/10, crowd index 10) — shoulder months with above-average climate and below-median search-interest. Often the best value-for-weather trade.
What is the UV index in Klagenfurt by month?
UV peaks at 6 (high) in July and is lowest in January at 1 (low). Monthly peak values: Jan 1, Feb 2, Mar 3, Apr 4, May 4, Jun 6, Jul 6, Aug 6, Sep 4, Oct 2, Nov 1, Dec 1.
What is the UV index in Klagenfurt in July?
July is the peak UV month in Klagenfurt, with a daily-peak UV index of 6 (high). Apply SPF 30+, wear sunglasses, and seek shade during midday hours.
How high can UV get in Klagenfurt 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. July is the worst case: typical days average UV 6 (high), 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, October. Plan sun protection for the worst case, not the average.
Is air quality in Klagenfurt bad for travelers?
PM2.5 (fine-particle pollution) exceeds the WHO sensitive-group guideline (15 µg/m³) in 6 months: January, February, March, October, November, December. The worst month is February with a typical-day mean of 21 µg/m³ (unhealthy for sensitive); on the worst 10% of days PM2.5 reaches 29 µg/m³ (unhealthy) 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.