(as a percent of scheduled flights)
Excel | CSV | Graphic Version
| Year | Month | Weather-related Delays (%) | Weather-related Cancellations (%) |
|---|---|---|---|
| 2004 | 1 | 2.26 | 1.52 |
| 2004 | 2 | 1.68 | 0.50 |
| 2004 | 3 | 0.99 | 0.41 |
| 2004 | 4 | 0.89 | 0.12 |
| 2004 | 5 | 1.78 | 0.48 |
| 2004 | 6 | 2.68 | 0.30 |
| 2004 | 7 | 1.69 | 0.29 |
| 2004 | 8 | 1.71 | 0.46 |
| 2004 | 9 | 0.78 | 1.79 |
| 2004 | 10 | 1.27 | 0.21 |
| 2004 | 11 | 1.65 | 0.30 |
| 2004 | 12 | 2.15 | 1.14 |
| 2005 | 1 | 2.32 | 2.65 |
| 2005 | 2 | 1.41 | 0.62 |
| 2005 | 3 | 1.48 | 0.48 |
| 2005 | 4 | 0.94 | 0.40 |
| 2005 | 5 | 1.00 | 0.18 |
| 2005 | 6 | 1.81 | 0.36 |
| 2005 | 7 | 2.73 | 0.63 |
| 2005 | 8 | 1.90 | 0.67 |
| 2005 | 9 | 0.84 | 0.82 |
| 2005 | 10 | 1.09 | 0.68 |
| 2005 | 11 | 1.12 | 0.24 |
| 2005 | 12 | 1.98 | 0.89 |
| 2006 | 1 | 1.41 | 0.52 |
| 2006 | 2 | 1.66 | 1.17 |
| 2006 | 3 | 1.48 | 0.33 |
| 2006 | 4 | 1.22 | 0.18 |
| 2006 | 5 | 1.41 | 0.21 |
| 2006 | 6 | 2.11 | 0.36 |
| 2006 | 7 | 1.92 | 0.29 |
| 2006 | 8 | 1.60 | 0.34 |
| 2006 | 9 | 1.49 | 0.31 |
| 2006 | 10 | 1.70 | 0.51 |
| 2006 | 11 | 1.36 | 0.56 |
| 2006 | 12 | 1.74 | 1.66 |
| 2007 | 1 | 2.04 | 1.33 |
| 2007 | 2 | 2.40 | 2.81 |
| 2007 | 3 | 1.42 | 1.29 |
| 2007 | 4 | 1.24 | 0.56 |
| 2007 | 5 | 1.35 | 0.27 |
| 2007 | 6 | 2.71 | 0.65 |
| 2007 | 7 | 2.36 | 0.49 |
| 2007 | 8 | 1.75 | 0.32 |
| 2007 | 9 | 0.87 | 0.17 |
| 2007 | 10 | 1.06 | 0.27 |
| 2007 | 11 | 0.83 | 0.22 |
| 2007 | 12 | 2.57 | 1.80 |
| 2008 | 1 | 1.61 | 1.11 |
| 2008 | 2 | 2.14 | 1.76 |
| 2008 | 3 | 1.66 | 1.22 |
| 2008 | 4 | 0.92 | 0.25 |
| 2008 | 5 | 0.94 | 0.24 |
| 2008 | 6 | 1.97 | 0.57 |
| 2008 | 7 | 1.60 | 0.42 |
| 2008 | 8 | 1.41 | 0.59 |
| 2008 | 9 | 0.58 | 1.20 |
| 2008 | 10 | 0.45 | 0.11 |
| 2008 | 11 | 0.70 | 0.18 |
| 2008 | 12 | 3.06 | 1.84 |
| 2009 | 1 | 1.75 | 1.25 |
| 2009 | 2 | 0.78 | 0.38 |
| 2009 | 3 | 1.20 | 1.11 |
| 2009 | 4 | 1.31 | 0.58 |
| 2009 | 5 | 1.06 | 0.22 |
| 2009 | 6 | 1.42 | 0.48 |
| 2009 | 7 | 1.33 | 0.31 |
| 2009 | 8 | 1.19 | 0.25 |
| 2009 | 9 | 0.60 | 0.13 |
| 2009 | 10 | 1.05 | 0.32 |
| 2009 | 11 | 0.35 | 0.13 |
| 2009 | 12 | 2.06 | 1.85 |
| 2010 | 1 | 1.17 | 1.30 |
| 2010 | 2 | 1.42 | 4.19 |
SOURCE: U.S. Department of Transportation, Research and Innovative Technology Administration, Bureau of Transportation Statistics, Airline On-Time Performance Database, February 2010