Best time to visit Nantes
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 Nantes
6 top-rated tours via Viator. Booking links earn this site a commission at no cost to you. Map locations are approximate (centred on Nantes).
- 1
Nantes Self-Guided Scavenger Hunt and Sights - 2
Nantes Challenges EVG EVJF City Challenge team - 3
Surprise Walk of Nantes with a Local - 4
Nantes Must-see Attractions Walking Tour With A Guide - 5
Private Transfer from Airports to Nantes - 6
Nantes Private Walking Tour With A Professional Guide
Last refreshed 2026-06-18.
Similar climatesColmar94% · Versailles94% · Strasbourg94%
Other destinations with the most-alike year-round climate to Nantes (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 Nantes'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 | 4–9 | 6 | 14 | 165 | 11.8 | 83% | 21 | 109 | 1 | Quiet | 4 |
| Feb | 5–11 | 8 | 11 | 138 | 12.5 | 78% | 23 | 116 | 1 | Quiet | 5 |
| Mar | 6–13 | 10 | 12 | 161 | 13.4 | 71% | 22 | 188 | 3 | Quiet | 5 |
| Apr | 8–16 | 14 | 9 | 123 | 13.7 | 63% | 20 | 223 | 4 | Quiet | 7 |
| May | 11–20 | 18 | 12 | 148 | 12.3 | 62% | 20 | 262 | 5 | Quiet | 7 |
| Jun | 14–23 | 23 | 11 | 136 | 12.4 | 61% | 18 | 268 | 6 | Quiet | 8 |
| Jul | 15–25 | 24 | 9 | 107 | 11.9 | 58% | 19 | 281 | 6 | Quiet | 9 |
| Aug | 16–25 | 25 | 9 | 104 | 11.6 | 61% | 19 | 260 | 5 | Peak | 8 |
| Sep | 14–23 | 22 | 12 | 114 | 9.5 | 64% | 18 | 218 | 4 | Busy | 8 |
| Oct | 11–18 | 17 | 14 | 169 | 12.1 | 75% | 21 | 164 | 2 | Moderate | 6 |
| Nov | 7–13 | 11 | 10 | 125 | 12.5 | 80% | 21 | 131 | 1 | Peak | 6 |
| Dec | 5–10 | 7 | 15 | 166 | 11.1 | 85% | 22 | 102 | 1 | Moderate | 4 |
UV Index in Nantes by Month
UV index in Nantes peaks at 6 (moderate) in June, dropping to 1 (low) in January.
Best months in detail
July
9/1015–25°C · 9 rain days (107h) · 281 sun hours · 58% humidity · Quiet crowd · UV 6 (moderate) · sunniest 1 in 10 days reach 8 (high)
August
8/1016–25°C · 9 rain days (104h) · 260 sun hours · 61% humidity · Peak crowd · UV 5 (moderate) · sunniest 1 in 10 days reach 7 (high)
September
8/1014–23°C · 12 rain days (114h) · 218 sun hours · 64% humidity · Busy crowd · UV 4 (moderate)
Every month
Show the other 9 months in detail
January
4/104–9°C (feels 6°C) · 14 rain days (165h) · 109 sun hours · 83% humidity · Quiet crowd · UV 1 (low)
February
5/105–11°C (feels 8°C) · 11 rain days (138h) · 116 sun hours · 78% humidity · Quiet crowd · UV 1 (low)
March
5/106–13°C (feels 10°C) · 12 rain days (161h) · 188 sun hours · 71% humidity · Quiet crowd · UV 3 (low) · sunniest 1 in 10 days reach 4 (moderate)
April
7/108–16°C (feels 14°C) · 9 rain days (123h) · 223 sun hours · 63% humidity · Quiet crowd · UV 4 (moderate) · sunniest 1 in 10 days reach 5 (moderate)
May
7/1011–20°C (feels 18°C) · 12 rain days (148h) · 262 sun hours · 62% humidity · Quiet crowd · UV 5 (moderate) · sunniest 1 in 10 days reach 7 (high)
June
8/1014–23°C · 11 rain days (136h) · 268 sun hours · 61% humidity · Quiet crowd · UV 6 (moderate) · sunniest 1 in 10 days reach 8 (very high)
October
6/1011–18°C (feels 17°C) · 14 rain days (169h) · 164 sun hours · 75% humidity · Moderate crowd · UV 2 (low) · sunniest 1 in 10 days reach 4 (moderate)
November
6/107–13°C (feels 11°C) · 10 rain days (125h) · 131 sun hours · 80% humidity · Peak crowd · UV 1 (low)
December
4/105–10°C (feels 7°C) · 15 rain days (166h) · 102 sun hours · 85% humidity · Moderate crowd · UV 1 (low)
Frequently asked questions about visiting Nantes
When is the best time to visit Nantes?
July is the highest-scoring month (9/10 on the Holiday Climate Index). Typical conditions: 15–25°C (9 rainy days). The top three months by score are July, August, September.
What is the worst time to visit Nantes?
December is the lowest-scoring month (4/10). Typical conditions: 5–10°C (15 rainy days).
When are crowds lowest in Nantes?
Search-interest seasonality (Google Trends 2021-2025) is lowest in February 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 Nantes have good weather but fewer tourists?
July (climate 9/10, crowd index 26) and June (climate 8/10, crowd index 15) — shoulder months with above-average climate and below-median search-interest. Often the best value-for-weather trade.
What is the UV index in Nantes 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 3, Apr 4, May 5, Jun 6, Jul 6, Aug 5, Sep 4, Oct 2, Nov 1, Dec 1.
What is the UV index in Nantes in June?
June is the peak UV month in Nantes, with a daily-peak UV index of 6 (moderate). Standard sun protection — sunglasses and light SPF — is recommended.
How high can UV get in Nantes 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 (very high) — and even higher. Months where the sunniest days routinely exceed the typical reading: March, April, May, June, July, August, October. Plan sun protection for the worst case, not the average.
Is air quality in Nantes bad for travelers?
PM2.5 (fine-particle pollution) exceeds the WHO sensitive-group guideline (15 µg/m³) in 5 months: January, February, March, November, December. The worst month is February with a typical-day mean of 12 µg/m³ (moderate); on the worst 10% of days PM2.5 reaches 22 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.