Best time to visit Lille
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 Lille
7 top-rated tours via Viator. Booking links earn this site a commission at no cost to you. Map locations are approximate (centred on Lille).
- 1
Unique Tour of Lille by Convertible 2CV - 1h00 - 2
1 Hour Private Lille Tour by Convertible 2CV with a Local Products Tasting - 3
Private Lille Tour by Classic Convertible 2CV with Champagne - 4
30-Minutes Private Guided Tour of Lille by Convertible 2CV - 5
Rallye "Discoveries and Surprises" - 6
Lille Challenges EVG, EVJF City Challenge team - 7
Best Intro to Lille in 2 hours with a Local
Last refreshed 2026-06-18.
Similar climatesGhent98% · Mechelen98% · Leuven98%
Other destinations with the most-alike year-round climate to Lille (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 Lille'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 | 156 | 12.0 | 84% | 23 | 82 | 1 | Quiet | 4 |
| Feb | 4–10 | 6 | 13 | 150 | 11.5 | 76% | 27 | 101 | 1 | Quiet | 4 |
| Mar | 4–12 | 8 | 14 | 167 | 11.9 | 68% | 23 | 163 | 2 | Quiet | 5 |
| Apr | 5–14 | 11 | 10 | 121 | 12.1 | 60% | 21 | 218 | 3 | Quiet | 6 |
| May | 9–18 | 16 | 11 | 134 | 12.2 | 61% | 21 | 255 | 4 | Quiet | 7 |
| Jun | 13–22 | 21 | 10 | 120 | 12.0 | 60% | 19 | 261 | 5 | Quiet | 8 |
| Jul | 14–23 | 22 | 12 | 139 | 11.6 | 61% | 20 | 262 | 5 | Quiet | 8 |
| Aug | 15–24 | 23 | 11 | 120 | 10.9 | 61% | 20 | 248 | 5 | Peak | 8 |
| Sep | 13–21 | 20 | 11 | 121 | 11.0 | 65% | 19 | 199 | 3 | Peak | 8 |
| Oct | 10–16 | 14 | 14 | 154 | 11.0 | 75% | 22 | 146 | 2 | Moderate | 6 |
| Nov | 6–11 | 8 | 12 | 129 | 10.8 | 83% | 22 | 90 | 1 | Peak | 5 |
| Dec | 4–8 | 4 | 14 | 166 | 11.9 | 86% | 22 | 63 | 1 | Moderate | 3 |
UV Index in Lille by Month
UV index in Lille peaks at 5 (moderate) in June, dropping to 1 (low) in January.
Best months in detail
June
8/1013–22°C (feels 21°C) · 10 rain days (120h) · 261 sun hours · 60% humidity · Quiet crowd · UV 5 (moderate) · sunniest 1 in 10 days reach 7 (high)
August
8/1015–24°C · 11 rain days (120h) · 248 sun hours · 61% humidity · Peak crowd · UV 5 (moderate) · sunniest 1 in 10 days reach 6 (high)
September
8/1013–21°C · 11 rain days (121h) · 199 sun hours · 65% humidity · Peak crowd · UV 3 (moderate) · sunniest 1 in 10 days reach 5 (moderate)
Every month
Show the other 9 months in detail
January
4/102–7°C (feels 3°C) · 13 rain days (156h) · 82 sun hours · 84% humidity · Quiet crowd · UV 1 (low)
February
4/104–10°C (feels 6°C) · 13 rain days (150h) · 101 sun hours · 76% humidity · Quiet crowd · UV 1 (low)
March
5/104–12°C (feels 8°C) · 14 rain days (167h) · 163 sun hours · 68% humidity · Quiet crowd · UV 2 (low) · sunniest 1 in 10 days reach 3 (moderate)
April
6/105–14°C (feels 11°C) · 10 rain days (121h) · 218 sun hours · 60% humidity · Quiet crowd · UV 3 (moderate) · sunniest 1 in 10 days reach 5 (moderate)
May
7/109–18°C (feels 16°C) · 11 rain days (134h) · 255 sun hours · 61% humidity · Quiet crowd · UV 4 (moderate) · sunniest 1 in 10 days reach 6 (moderate)
July
8/1014–23°C · 12 rain days (139h) · 262 sun hours · 61% humidity · Quiet crowd · UV 5 (moderate) · sunniest 1 in 10 days reach 7 (high)
October
6/1010–16°C (feels 14°C) · 14 rain days (154h) · 146 sun hours · 75% humidity · Moderate crowd · UV 2 (low)
November
5/106–11°C (feels 8°C) · 12 rain days (129h) · 90 sun hours · 83% humidity · Peak crowd · UV 1 (low)
December
3/104–8°C (feels 4°C) · 14 rain days (166h) · 63 sun hours · 86% humidity · Moderate crowd · UV 1 (low)
Frequently asked questions about visiting Lille
When is the best time to visit Lille?
June is the highest-scoring month (8/10 on the Holiday Climate Index). Typical conditions: 13–22°C (10 rainy days). The top three months by score are June, August, September.
What is the worst time to visit Lille?
December is the lowest-scoring month (3/10). Typical conditions: 4–8°C (14 rainy days).
When are crowds lowest in Lille?
Search-interest seasonality (Google Trends 2021-2025) is lowest in February 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 Lille have good weather but fewer tourists?
June (climate 8/10, crowd index 10) and July (climate 8/10, crowd index 20) — shoulder months with above-average climate and below-median search-interest. Often the best value-for-weather trade.
What is the UV index in Lille 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 Lille in June?
June is the peak UV month in Lille, with a daily-peak UV index of 5 (moderate). Standard sun protection — sunglasses and light SPF — is recommended.
How high can UV get in Lille 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, September. Plan sun protection for the worst case, not the average.
Is air quality in Lille bad for travelers?
PM2.5 (fine-particle pollution) exceeds the WHO sensitive-group guideline (15 µg/m³) in 9 months: January, February, March, April, May, June, 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 28 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.