How often does weather delay flights at Bordeaux-Mérignac?
From January 2018 to September 2026, EUROCONTROL recorded arrival restrictions for weather (regulation reason W) at Bordeaux-Mérignac (BOD) on 86 of 3,194 days (2.7%). The worst month is October: 7% of days and 0.1 minutes of weather delay per arriving flight on average. Calmest: March (0% of days). Weather caused 4% 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% | 1% | 0.03 |
| February | 2% | 1% | 0.04 |
| March | 0% | 0% | 0.00 |
| April | 1% | 1% | 0.02 |
| May | 3% | 1% | 0.02 |
| June | 2% | 1% | 0.02 |
| July | 1% | 1% | 0.02 |
| August | 1% | 1% | 0.01 |
| September | 2% | 2% | 0.05 |
| October | 7% | 2% | 0.09 |
| November | 2% | 0% | 0.01 |
| December | 5% | 3% | 0.13 |
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 4 (11%), week 52 (11%), week 44 (9%).
Year by year
| Year | Days with weather restrictions | Minutes per arriving flight | Arrivals |
|---|---|---|---|
| 2018 | 7 of 365 | 0.04 | 34,701 |
| 2019 | 14 of 365 | 0.03 | 37,333 |
| 2020 | 2 of 365 | 0.00 | 14,852 |
| 2021 | 2 of 365 | 0.01 | 19,316 |
| 2022 | 15 of 365 | 0.03 | 27,505 |
| 2023 | 16 of 365 | 0.09 | 30,091 |
| 2024 | 11 of 366 | 0.03 | 28,989 |
| 2025 | 10 of 365 | 0.02 | 25,839 |
| 2026 (Jan–Sep) | 9 of 273 | 0.03 | 20,296 |
2020–2021: far fewer flights during the pandemic.
Weather among all causes
| Cause of arrival regulation | Share of delay minutes |
|---|---|
| Atc staffing | 43% |
| Industrial action (atc) | 20% |
| Air traffic control capacity | 20% |
| Weather | 4% |
| Aerodrome capacity | 4% |
| Other | 3% |
| Special event | 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 | 20% | 5.2% | 3.8× |
| Fog or visibility under 800 m | 58% | 10% | 5.8× |
| Cloud base at or below 200 ft | 17% | 3.0% | 5.8× |
| Gusts of 30 knots or more | 7.0% | 5.0% | 1.4× |
| Crosswind of 20 knots or more on the best runway | 0.0% | 0.0% | — |
| Snow | 0.0% | 0.8% | — |
| Freezing rain or drizzle | 0.0% | 0.0% | — |
On 17% 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 3,194 days with full METAR coverage.
The heaviest days
| Date and reported weather | Weather delay, minutes | Arrivals | Minutes per arrival |
|---|---|---|---|
| 18 December 2023 Fog or visibility under 800 m | 738 | 72 | 10.2 |
| 9 October 2018 Fog or visibility under 800 m; Cloud base at or below 200 ft | 468 | 101 | 4.6 |
| 11 October 2018 none of these in the airport's METAR | 460 | 122 | 3.8 |
| 29 December 2019 Fog or visibility under 800 m; Cloud base at or below 200 ft | 434 | 89 | 4.9 |
| 22 September 2023 none of these in the airport's METAR | 388 | 117 | 3.3 |
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 LFBD, IATA BOD. Ranking by share of restriction days: 48 of 94 airports on this site.