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The frequency of cloud cover is derived from approximately 20 years of observations. Statistics are for mid-transit time give or take one or two hours. Cloud cover in many areas increases during the day and decreases at night, so that at most locations the cloud amount shown will be heavier than at the start of the transit, and less than the end.
| Average Weather Statistics for June | |||||
| North America | |||||
| Percent Frequency of Cloud Cover at mid-transit (08h UT) | |||||
| Location | Clear | Scattered | Broken | Overcast | Obscured |
| United States | |||||
| Boston, MA | 19.2 | 22.8 | 18.5 | 39.5 | 0 |
| Washington, DC | 23.3 | 22.0 | 21.0 | 33.6 | 0 |
| Atlanta, GA | 33.9 | 22.1 | 16.9 | 27.0 | 0 |
| Miami, FL | 16.9 | 49.9 | 20.8 | 12.4 | 0 |
| New Orleans, LA | 37.7 | 36.4 | 16.1 | 9.8 | 0 |
| Nashville, TN | 36.3 | 24.1 | 16.7 | 22.9 | 0 |
| Chicago, IL | 36.6 | 19.1 | 16.4 | 27.9 | 0 |
| St. Louis, MO | 36.2 | 19.3 | 18.2 | 26.3 | 0 |
| Kansas City, KA | 38.1 | 18.2 | 16.0 | 27.7 | 0 |
| Dallas, TX | 40.1 | 18.4 | 16.6 | 24.9 | 0 |
| Houston, TX | 30.7 | 30.0 | 22.6 | 16.7 | 0 |
| Denver, CO | 32.3 | 28.8 | 20.7 | 18.2 | 0 |
| Fargo, ND | 27.3 | 26.3 | 16.9 | 29.5 | 0 |
| Canada | |||||
| St. John, NB | 7.9 | 24.1 | 19.8 | 27.4 | 20.8 |
| St. John's, NF | 2.6 | 13.1 | 27.5 | 38.9 | 18.0 |
| Halifax, NS | 3.9 | 26.2 | 23.4 | 26.9 | 19.7 |
| Quebec City, QC | 1.8 | 31.8 | 32.7 | 31.2 | 2.5 |
| Montreal, QC | 4.0 | 36.5 | 32.3 | 26.4 | 0.8 |
| Ottawa, ON | 5.6 | 38.1 | 26.7 | 26.9 | 2.8 |
| Toronto, ON | 5.8 | 39.5 | 30.3 | 22.4 | 2.1 |
| Winnipeg, MB | 8.7 | 40.0 | 29.6 | 21.7 | 0 |
| Edmonton, AB | 5.9 | 37.8 | 34.3 | 22.0 | 0 |
| Yellowknife, NT | 2.2 | 44.9 | 42.2 | 10.3 | 0.5 |
| Inuvik, NT | 4.0 | 39.3 | 33.5 | 20.7 | 2.5 |
| Resolute Bay, NU | 4.3 | 20.9 | 27.5 | 39.9 | 7.5 |
Transit Predictions & Webmaster: Fred Espenak Email: espenak@gsfc.nasa.gov Planteary Systems Laboratory - Code 693
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Last revised: 2004 Jan 22 - F. Espenak