How often does weather delay flights at Nantes-Atlantique?
From January 2018 to September 2026, EUROCONTROL recorded arrival restrictions for weather (regulation reason W) at Nantes-Atlantique (NTE) on 133 of 3,188 days (4.2%). The worst month is October: 8% of days and 0.4 minutes of weather delay per arriving flight on average. Calmest: July (0% of days). Weather caused 57% of all arrival-regulation delay minutes at this airport. Source: EUROCONTROL.
Month by month
| Month | Days with weather restrictions | Days with ≥ 1 min per arrival | Minutes per arriving flight |
|---|---|---|---|
| January | 5% | 3% | 0.14 |
| February | 6% | 5% | 0.25 |
| March | 2% | 0% | 0.01 |
| April | 3% | 1% | 0.11 |
| May | 3% | 2% | 0.05 |
| June | 4% | 3% | 0.22 |
| July | 0% | 0% | 0.01 |
| August | 3% | 1% | 0.04 |
| September | 6% | 3% | 0.17 |
| October | 8% | 6% | 0.39 |
| November | 7% | 5% | 0.29 |
| December | 6% | 4% | 0.24 |
Share of days on which EUROCONTROL's network manager limited arrivals because of weather at or around the airport (regulation reason W), 2018–2026. Minutes per arriving flight = weather-regulation delay ÷ all arrivals that month. Worst weeks of the year: week 43 (16%), week 44 (14%), week 24 (10%).
Year by year
| Year | Days with weather restrictions | Minutes per arriving flight | Arrivals |
|---|---|---|---|
| 2018 | 13 of 365 | 0.08 | 30,507 |
| 2019 | 11 of 365 | 0.06 | 32,763 |
| 2020 | 1 of 359 | 0.00 | 12,518 |
| 2021 | 5 of 365 | 0.02 | 15,241 |
| 2022 | 4 of 365 | 0.03 | 23,333 |
| 2023 | 6 of 365 | 0.09 | 25,350 |
| 2024 | 32 of 366 | 0.27 | 26,295 |
| 2025 | 38 of 365 | 0.46 | 26,821 |
| 2026 (Jan–Sep) | 23 of 273 | 0.24 | 20,703 |
2020–2021: far fewer flights during the pandemic.
Weather among all causes
| Cause of arrival regulation | Share of delay minutes |
|---|---|
| Weather | 57% |
| Atc equipment | 13% |
| Industrial action (atc) | 10% |
| Air traffic control capacity | 8% |
| Aerodrome capacity | 5% |
| Equipment (non-atc) | 2% |
Causes with at least 2% of all arrival-regulation delay minutes, 2018–2026.
What the weather was like on those days
| In the airport's weather reports (METAR, 05–21 UTC) | Days with weather restrictions | Other days | Ratio |
|---|---|---|---|
| Thunderstorm reported | 6.0% | 3.7% | 1.6× |
| Fog or visibility under 800 m | 45% | 4.5% | 10.1× |
| Cloud base at or below 200 ft | 23% | 3.5% | 6.4× |
| Gusts of 30 knots or more | 9.0% | 6.3% | 1.4× |
| Crosswind of 20 knots or more on the best runway | 1.5% | 1.0% | — |
| Snow | 3.0% | 0.5% | — |
| Freezing rain or drizzle | 0.8% | 0.1% | — |
On 34% of the restriction days none of these showed up in the airport's own reports: restrictions are also set on forecasts, for weather on the approach or elsewhere in the area, and when the wind direction forces a less efficient runway layout. The weather is what came with the delays, not proof of their cause. Based on 3,188 days with full METAR coverage.
The heaviest days
| Date and reported weather | Weather delay, minutes | Arrivals | Minutes per arrival |
|---|---|---|---|
| 3 October 2025 none of these in the airport's METAR | 2,553 | 80 | 31.9 |
| 5 June 2025 none of these in the airport's METAR | 1,846 | 91 | 20.3 |
| 9 December 2023 none of these in the airport's METAR | 1,568 | 40 | 39.2 |
| 4 November 2024 Fog or visibility under 800 m; Cloud base at or below 200 ft | 1,432 | 83 | 17.3 |
| 3 June 2026 none of these in the airport's METAR | 1,297 | 86 | 15.1 |
What these numbers cover
- Only delays from air traffic flow management (ATFM) regulations on arrivals are counted — not all delays, not departures, and not cancellations or diversions. A day with restrictions does not mean every flight was late.
- Airport ICAO code LFRS, IATA NTE. Ranking by share of restriction days: 37 of 94 airports on this site.