| 11. | The annual average of completely overcast days varies between 70 and 190.
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| 12. | But on an overcast day the problem is a lack of contrast.
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| 13. | Blue flowers look their best in shade or on an overcast day.
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| 14. | About 30 percent might conceivably, on an overcast day, be marginally plausible.
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| 15. | Mrs . Clinton wore sunglasses on an overcast day with occasional rain.
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| 16. | Annual bright sunshine averages 1082 hours in Shetland and overcast days are common.
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| 17. | This time, the heat wasn't a factor on an overcast day.
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| 18. | Small crowds came out to greet him on an overcast day.
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| 19. | The best time to wash windows is a calm, overcast day.
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| 20. | Sampras, seeded second, had trouble with the breeze on a cool, overcast day.
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