How often does weather delay flights at Annemasse?
From January 2018 to September 2026, EUROCONTROL recorded arrival restrictions for weather (regulation reason W) at Annemasse on 20 of 2,894 days (0.7%). Weather caused 43% of all arrival-regulation delay minutes at this airport. Source: EUROCONTROL.
Too few weather-restriction days for monthly patterns to mean much; this page is shown for completeness.
Month by month
| Month | Days with weather restrictions | Days with ≥ 1 min per arrival | Minutes per arriving flight |
|---|---|---|---|
| January | 0% | 0% | 0.00 |
| February | 0% | 0% | 0.04 |
| March | 0% | 0% | 0.20 |
| April | 0% | 0% | 0.00 |
| May | 2% | 2% | 0.21 |
| June | 2% | 2% | 0.10 |
| July | 1% | 1% | 0.06 |
| August | 1% | 1% | 0.05 |
| September | 1% | 1% | 0.22 |
| October | 0% | 0% | 0.02 |
| November | 0% | 0% | 0.00 |
| December | 0% | 0% | 0.00 |
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 27 (5%), week 32 (3%), week 25 (3%).
Year by year
| Year | Days with weather restrictions | Minutes per arriving flight | Arrivals |
|---|---|---|---|
| 2018 | 12 of 318 | 0.60 | 684 |
| 2019 | 8 of 313 | 0.52 | 674 |
| 2020 | 0 of 256 | 0.00 | 597 |
| 2021 | 0 of 346 | 0.00 | 1,104 |
| 2022 | 0 of 351 | 0.00 | 1,114 |
| 2023 | 0 of 351 | 0.00 | 1,023 |
| 2024 | 0 of 346 | 0.00 | 963 |
| 2025 | 0 of 345 | 0.00 | 857 |
| 2026 (Jan–Sep) | 0 of 268 | 0.00 | 693 |
2020–2021: far fewer flights during the pandemic.
Weather among all causes
| Cause of arrival regulation | Share of delay minutes |
|---|---|
| Weather | 43% |
| Aerodrome capacity | 35% |
| Atc staffing | 14% |
| Air traffic control capacity | 6% |
Causes with at least 2% of all arrival-regulation delay minutes, 2018–2026.
The heaviest days
| Date and reported weather | Weather delay, minutes | Arrivals | Minutes per arrival |
|---|---|---|---|
| 8 September 2019 | 180 | 9 | 20.0 |
| 21 May 2018 | 138 | 9 | 15.3 |
| 5 March 2018 | 114 | 2 | 57.0 |
| 9 May 2018 | 36 | 4 | 9.0 |
| 11 August 2019 | 32 | 5 | 6.4 |
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 LFLI. Ranking by share of restriction days: 78 of 94 airports on this site.