Best time to visit Leuven

Re-score for me — drag the dial — every chart on the page recolours live for your heat limit 27°C
I'm comfortable up to 27°C feels-like
22° heat-averse 30° heat-loving

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.

Saved to this browser. Changes update the strips below.
Recent · 2020-2024
Interest Google Trends 2021-2025 searches, not arrivals (?)
Day · avg daily high (?)
Night · avg overnight low (?)
UV index · On a typical day around midday, UV is about this (?)
112345553211
On the sunniest 1 in 10 days, UV reaches this — and even higher
356777
PM2.5 air quality · on a typical day (?)
1313141110978881012
On the worst 1 in 10 days, PM2.5 reaches this — and even higher
272327171814101212142023
June 8/10 feels 22°C (+2°C vs 1991-2020) · HCI 83/100
Day 22° · Night 13° 59% humidity 17 km/h wind 11 rain days (118h) 259h sun
Thermal 9
Sky 8
Rain 7
Wind 10

Higher = better, including rain & wind (green = "doesn't hurt the score", not "lots of it").

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.

Similar climatesMechelen99% · Brussels98% · Ghent98%

Other destinations with the most-alike year-round climate to Leuven (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 Leuven'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 2–7 3 13 160 12.3 84% 23 81 1 Quiet 3
Feb 4–10 5 14 162 11.6 76% 26 104 1 Quiet 4
Mar 4–11 8 12 166 13.8 68% 21 169 2 Quiet 5
Apr 5–14 11 10 127 12.7 60% 20 212 3 Quiet 6
May 9–18 16 12 134 11.2 60% 19 255 4 Quiet 7
Jun 13–22 22 11 118 10.7 59% 17 259 5 Quiet 8
Jul 14–23 22 12 144 12.0 62% 19 264 5 Quiet 8
Aug 15–24 24 14 135 9.6 62% 18 250 5 Busy 8
Sep 12–21 20 11 122 11.1 66% 17 206 3 Busy 8
Oct 10–16 14 14 143 10.2 76% 22 141 2 Moderate 6
Nov 5–11 8 13 139 10.7 82% 21 96 1 Peak 4
Dec 3–8 4 14 171 12.2 86% 22 61 1 Busy 3

UV Index in Leuven by Month

UV index in Leuven peaks at 5 (moderate) in June, dropping to 1 (low) in January.

Best months in detail

June

8/10

13–22°C · 11 rain days (118h) · 259 sun hours · 59% humidity · Quiet crowd · UV 5 (moderate) · sunniest 1 in 10 days reach 7 (high)

September

8/10

12–21°C · 11 rain days (122h) · 206 sun hours · 66% humidity · Busy crowd · UV 3 (moderate)

July

8/10

14–23°C · 12 rain days (144h) · 264 sun hours · 62% humidity · Quiet crowd · UV 5 (moderate) · sunniest 1 in 10 days reach 7 (high)

Every month

Show the other 9 months in detail

January

3/10

2–7°C (feels 3°C) · 13 rain days (160h) · 81 sun hours · 84% humidity · Quiet crowd · UV 1 (low)

February

4/10

4–10°C (feels 5°C) · 14 rain days (162h) · 104 sun hours · 76% humidity · Quiet crowd · UV 1 (low)

March

5/10

4–11°C (feels 8°C) · 12 rain days (166h) · 169 sun hours · 68% humidity · Quiet crowd · UV 2 (low) · sunniest 1 in 10 days reach 3 (moderate)

April

6/10

5–14°C (feels 11°C) · 10 rain days (127h) · 212 sun hours · 60% humidity · Quiet crowd · UV 3 (moderate) · sunniest 1 in 10 days reach 5 (moderate)

May

7/10

9–18°C (feels 16°C) · 12 rain days (134h) · 255 sun hours · 60% humidity · Quiet crowd · UV 4 (moderate) · sunniest 1 in 10 days reach 6 (moderate)

August

8/10

15–24°C · 14 rain days (135h) · 250 sun hours · 62% humidity · Busy crowd · UV 5 (moderate) · sunniest 1 in 10 days reach 7 (high)

October

6/10

10–16°C (feels 14°C) · 14 rain days (143h) · 141 sun hours · 76% humidity · Moderate crowd · UV 2 (low)

November

4/10

5–11°C (feels 8°C) · 13 rain days (139h) · 96 sun hours · 82% humidity · Peak crowd · UV 1 (low)

December

3/10

3–8°C (feels 4°C) · 14 rain days (171h) · 61 sun hours · 86% humidity · Busy crowd · UV 1 (low)

Frequently asked questions about visiting Leuven

When is the best time to visit Leuven?

June is the highest-scoring month (8/10 on the Holiday Climate Index). Typical conditions: 13–22°C (11 rainy days). The top three months by score are June, September, July.

What is the worst time to visit Leuven?

December is the lowest-scoring month (3/10). Typical conditions: 3–8°C (14 rainy days).

When are crowds lowest in Leuven?

Search-interest seasonality (Google Trends 2021-2025) is lowest in May 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 Leuven have good weather but fewer tourists?

June (climate 8/10, crowd index 1) and July (climate 8/10, crowd index 23) — shoulder months with above-average climate and below-median search-interest. Often the best value-for-weather trade.

What is the UV index in Leuven 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 Leuven in June?

June is the peak UV month in Leuven, with a daily-peak UV index of 5 (moderate). Standard sun protection — sunglasses and light SPF — is recommended.

How high can UV get in Leuven 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 7 (high) — and even higher. Months where the sunniest days routinely exceed the typical reading: March, April, May, June, July, August. Plan sun protection for the worst case, not the average.

Is air quality in Leuven bad for travelers?

PM2.5 (fine-particle pollution) exceeds the WHO sensitive-group guideline (15 µg/m³) in 7 months: January, February, March, April, May, 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 27 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.