Climate Summary
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| Denison, Iowa Climate Summary Temperature • Average annual temperature: 48.5°F (9.2°C)
• Average January temperature: 21.7°F (-5.7°C)
• Average July temperature: 74.1°F (23.4°C)
• Highest recorded temperature: 111°F (43.9°C) on July 14, 1936
• Lowest recorded temperature: -37°F (-38.3°C) on January 16, 1912 Precipitation • Average annual precipitation: 33.06 inches (840 mm)
• Average number of days with precipitation: 106
• Average annual snowfall: 30.8 inches (78 cm)
• Highest recorded 24-hour snowfall: 15.0 inches (38 cm) on December 26, 1951 Wind • Average annual wind speed: 10.4 mph (16.7 km/h)
• Prevailing wind direction: West Humidity • Average annual relative humidity: 72% Climate Classification • Köppen climate classification: Dfa (Continental Climate, Hot Summer) Climate Summary Denison, Iowa has a continental climate with hot summers and cold winters. The average annual temperature is 48.5°F (9.2°C), with average January temperatures of 21.7°F (-5.7°C) and average July temperatures of 74.1°F (23.4°C). The highest recorded temperature in Denison was 111°F (43.9°C) on July 14, 1936, and the lowest recorded temperature was -37°F (-38.3°C) on January 16, 1912. Denison receives an average of 33.06 inches (840 mm) of precipitation each year, with an average of 106 days with precipitation. The average annual snowfall is 30.8 inches (78 cm), with the highest recorded 24-hour snowfall of 15.0 inches (38 cm) on December 26, 1951. The prevailing wind direction in Denison is west, and the average annual wind speed is 10.4 mph (16.7 km/h). The average annual relative humidity is 72%. Denison's climate is classified as Dfa (Continental Climate, Hot Summer) according to the Köppen climate classification system. |
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| Facts & Historical Information
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| Natural History • Denison is home to the Crawford County Conservation Board's Denison Area Park, which features a 130-acre lake and a 150-foot observation tower offering panoramic views of the surrounding Loess Hills. • The park also boasts a diverse ecosystem, including wetlands, prairies, and woodlands, supporting a variety of wildlife, including bald eagles, white-tailed deer, and coyotes. Science • Denison was the site of a major archaeological discovery in 1968, when the remains of a 10,000-year-old mastodon were unearthed. The mastodon is now on display at the Denison Public Library. • The city is also home to the Iowa Natural History Museum, which features exhibits on the state's natural history, including fossils, minerals, and wildlife. Personalities • Denison is the birthplace of Dr. George Washington Carver, an agricultural scientist and inventor who developed hundreds of uses for peanuts and other crops. • The city is also home to the George Washington Carver National Monument, which preserves the site of his birthplace and honors his legacy. |
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Tourist Attractions
| 1.Historic Denison Depot - A restored 1879 railroad depot that now houses a museum, gift shop, and event space. 2.Little Sioux River Greenway - A scenic 10-mile paved trail that follows the Little Sioux River, offering opportunities for walking, biking, and fishing. 3.Black Hawk Lake - A 900-acre lake located just outside of Denison, offering swimming, boating, fishing, and camping. |
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Nearby Cities:| Manning, IA | | Ida Grove, IA | Harlan, IA | | Omaha, NE | | Lincoln, NE | Des Moines, IA | | Sioux City, IA | Ames, IA | | West Des Moines, IA | Council Bluffs, IA | | Ankeny, IA | Bellevue, NE | | Urbandale, IA | Fremont, NE | | Fort Dodge, IA | |
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