How often does weather delay flights at Paris-Charles-de-Gaulle?
From January 2018 to September 2026, EUROCONTROL recorded arrival restrictions for weather (regulation reason W) at Paris-Charles-de-Gaulle (CDG) on 534 of 3,195 days (17%). The worst month is November: 28% of days and 0.7 minutes of weather delay per arriving flight on average. Calmest: March (8% of days). Weather caused 62% 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 | 23% | 10% | 0.46 |
| February | 15% | 7% | 0.19 |
| March | 8% | 3% | 0.09 |
| April | 9% | 4% | 0.12 |
| May | 17% | 5% | 0.20 |
| June | 17% | 7% | 0.27 |
| July | 15% | 4% | 0.14 |
| August | 13% | 4% | 0.13 |
| September | 15% | 4% | 0.17 |
| October | 19% | 8% | 0.32 |
| November | 28% | 12% | 0.70 |
| December | 24% | 11% | 0.44 |
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 45 (34%), week 50 (30%), week 43 (29%).
Year by year
| Year | Days with weather restrictions | Minutes per arriving flight | Arrivals |
|---|---|---|---|
| 2018 | 92 of 365 | 0.26 | 243,973 |
| 2019 | 78 of 365 | 0.25 | 252,357 |
| 2020 | 19 of 366 | 0.10 | 110,353 |
| 2021 | 36 of 365 | 0.10 | 127,988 |
| 2022 | 60 of 365 | 0.19 | 204,649 |
| 2023 | 46 of 365 | 0.10 | 227,557 |
| 2024 | 74 of 366 | 0.26 | 233,362 |
| 2025 | 74 of 365 | 0.52 | 239,863 |
| 2026 (Jan–Sep) | 55 of 273 | 0.40 | 180,891 |
2020–2021: far fewer flights during the pandemic.
Weather among all causes
| Cause of arrival regulation | Share of delay minutes |
|---|---|
| Weather | 62% |
| Aerodrome capacity | 12% |
| Atc staffing | 7% |
| Industrial action (non-atc) | 7% |
| Special event | 4% |
| Air traffic control capacity | 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 | 16% | 1.8% | — |
| Fog or visibility under 800 m | 29% | 2.2% | 13.2× |
| Cloud base at or below 200 ft | 27% | 1.7% | — |
| Gusts of 30 knots or more | 8.8% | 6.8% | 1.3× |
| Crosswind of 20 knots or more on the best runway | 2.6% | 1.8% | — |
| Snow | 5.2% | 1.6% | — |
| Freezing rain or drizzle | 0.0% | 0.0% | — |
On 40% 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 3,195 days with full METAR coverage.
The heaviest days
| Date and reported weather | Weather delay, minutes | Arrivals | Minutes per arrival |
|---|---|---|---|
| 5 December 2025 Fog or visibility under 800 m; Cloud base at or below 200 ft | 14,675 | 624 | 23.5 |
| 7 January 2026 Snow | 12,325 | 506 | 24.4 |
| 22 November 2025 Fog or visibility under 800 m; Cloud base at or below 200 ft | 12,305 | 561 | 21.9 |
| 5 January 2026 Fog or visibility under 800 m; Cloud base at or below 200 ft; Snow | 11,363 | 633 | 18.0 |
| 9 November 2025 Fog or visibility under 800 m | 9,462 | 602 | 15.7 |
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 LFPG, IATA CDG. Ranking by share of restriction days: 9 of 94 airports on this site.