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Weather and Average Temperatures
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Month JanuaryFebruary March April May June July August September October November December |
High (F) 4145 51 60 70 81 84 82 76 65 52 43 |
Low (F) 1821 25 32 39 47 54 53 47 36 27 20 |
High (C) 57 10 15 21 27 29 28 24 18 11 6 |
Low (C) -8-6 -4 0 4 8 12 12 8 2 -3 7 |
Precipitation 1.3”1.5” 1.4” 0.9” 0.7” 0.4” 1.8” 2.2” 1.6” 1.1” 0.9” 1.6” |
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Month JanuaryFebruary March April May June July August September October November December |
High (F) 5662 71 82 92 101 106 103 97 84 68 57 |
Low (F) 3642 48 56 63 72 78 75 69 58 46 37 |
High (C) 1317 22 28 33 38 41 39 36 29 20 14 |
Low (C) 26 9 13 17 22 26 24 21 14 8 2 |
Precipitation 0.7”0.8” 0.8” 0.5” 0.4” 0.3” 0.8” 1.4” 1.0” 0.6” 0.4” 0.9” |
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By mid-April, winter weather usually begins to break, and although snow is not uncommon in May, warm spells become more frequent. The cold winter temperatures give way to warming and a pleasant spring. This is a great time to visit the Canyon if you prefer smaller crowds since school's usually do not break for summer vacation until late May.
You will discover the largest crowds during the summer months. Summer temperatures are quite pleasant. If you plan on hiking or riding mules into the depths of the canyon temperatures can rise dramatically. You must dress accordingly in layers and carry an adequate supply of drinking water. Summer thunderstorms frequently occur during July, August, and early September with potential for torrential rains, frequent lightning, and sudden flash floods at the canon floor. Thunderstorms are variable in intensity and are more likely to occur mainly between 11 AM and 6 PM. Some of these storms can reach severe levels, with large hail and strong winds.
Summer heat gives way to cooler temperatures during the fall months of September and October with progressively cooler temperatures into the later fall periods. Potential for summer rains typically diminish in early September. However, late summer thunderstorms or early winter snow storms have been known to take place during season transition creating sudden changes in temperature.
Winter weather conditions on the South Rim can be harsh. However, the Grand Canyon is beautiful when covered with winter snow. Services and some facilities at the South Rim are open all year, but be prepared for cold temperatures, snow, icy roads and possible road closures. Dress in layers since very chilly morning hours become warmer as the day progresses.
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