https://www.lonelyplanet.com/american-samoa/attractions/rainmaker-mountain/a/poi-sig/1456093/362248, Precipitation History of the Mojave Desert Region, 1893–2001, https://www.washingtonpost.com/gdpr-consent/?destination=%2fweather%2f2019%2f10%2f31%2farctic-chill-blasts-east-bringing-early-dose-winter-record-cold%2f%3f, https://electroverse.net/the-continental-u-s-just-set-its-coldest-ever-october-temperature/, https://www.climatedepot.com/2019/10/30/utah-sees-record-cold-of-43-6-of-may-be-lowest-october-temperature-ever-recorded-in-continental-u-s/, "Climate at a Glance: National Centers for Environmental Information", Large Floods in the United States: Where They Happen and Why, QuickStats: Number of Heat-Related Deaths,* by Sex — National Vital Statistics System, United States,† 1999–2010§, Hypothermia-Related Deaths - United States, 2003-2004, https://en.wikipedia.org/w/index.php?title=Climate_of_the_United_States&oldid=991929319, Short description is different from Wikidata, Articles lacking in-text citations from June 2020, All Wikipedia articles written in American English, Articles with unsourced statements from July 2018, Articles to be expanded from January 2019, Creative Commons Attribution-ShareAlike License, This page was last edited on 2 December 2020, at 15:56. Most of the Florida peninsula including Tampa and Jacksonville, along with other coastal cities like Houston, New Orleans, Savannah, GA, Charleston, SC and Wilmington, NC all have average summer highs from near 90 to the lower 90s F, and lows generally from 70 to 75 °F (21 to 24 °C); combined with moist tropical air, this creates the sultry summer weather conditions that prevail here. A Mediterranean climate prevails along most of the California coast, while southern Florida has a tropical climate, the warmest region on the US mainland. Other places with significant snowfall outside the Cascade Range are the Wasatch Range, near the Great Salt Lake and the Sierra Nevada, near Lake Tahoe. The climate of the United States varies due to changes in latitude, and a range of geographic features, including mountains and deserts. Daytime highs range from 80 to 90 °F (27 to 32 °C) in summer to 35 to 50 °F (2 to 10 °C) in winter. on the prevailing windward side, of the Olympic and Cascade mountain ranges), experiences a mostly overcast, wet and cool climate, but without severe cold like that found in the interior northern U.S. (i.e. However, occasionally frozen precipitation (snow, sleet and/or freezing rain) can occur (more commonly in interior and northern areas) when southerly-tracking storms throw Gulf or Atlantic moisture over cold air at ground level. Across the central states from late fall to spring, "Panhandle hook" storms move from the central Rockies into the Oklahoma/Texas panhandle areas, then northeast toward the Great Lakes. "<, Hawaii has 11 different climate zones, influenced by altitude and topographical effect on wind and rainfall. The fall and spring temperatures in the Midwest are very moderate—50-75 degrees—making these months the best time to visit. The average snow to liquid ratio across the contiguous United States is 13:1, meaning 13 inches (330 mm) of snow melts down to 1 inch (25 mm) of water. both Dakotas, Nebraska, Iowa and Minnesota). The Great Basin and Columbia Plateau (the Intermontane Plateaus) are arid or semiarid regions, with high summer temperatures in the 90s to occasionally over 100 at lower elevations (e.g. Coastal areas of Oregon and Washington have an oceanic climate. Because of contrasting air masses, the Great Plains, the Midwest, and the southern United States have frequent severe thunderstorms and tornado outbreaks during both the spring and the summer. United States of America Weather, climate and geography Weather and climate Best time to visit. Related climate and educational websites. These climates normally lie on the southeast side of all continents, generally between latitudes 25° and 35° and are located poleward from adjacent tropical climates.. The southern US has a second tornado season during the autumn. , In the central and upper eastern United States, precipitation is evenly distributed throughout the year, although summer rainfall increases as one moves southeastward. The United States of America, with its size of almost 10 million km² and a wide variety of landscapes, extends over numerous climate zones. The eastern part of this flat, low-lying region is North America's most productive agricultural … Rainmaker Mountain on Tutuila traps trade-wind rainclouds, leading to very high rainfall and a tropical rainforest climate (Köppen Af). The Gulf of Alaska is the origination area of many storms that enter the United States. Even in the driest month there is a lot of rain. 97-37 NOVEMBER 21, 1997: El Niño and California Precipitation. Some exceptions include the Great Mississippi Flood of 1927, the Great Flood of 1993, and widespread flooding and mudslides caused by the 1982–83 El Niño event in the western United States. In winter, daily temperatures in the southwest are cooler with highs in the 50s and 60s F, and lows in the 40s F. While many subtropical climates tend to be located at or near coastal locations, in some cases they extend inland, most … Average daily high temperatures range from 10 °F (−12 °C)s (in North Dakota, and central and northern Minnesota) to 30 °F (−1 °C)s in winter to 70 to 80 °F (21 to 27 °C)s in summer, while overnight lows range from below 0 °F (−18 °C) in winter (in North Dakota and much of Minnesota) to 50 to 60 °F (10 to 16 °C)s in summer. U.S. Leaving Paris Climate Agreement The United States is the only country to back out of its promises to reduce greenhouse gas emissions. In the Northern Hemisphere summer, high pressure in the Pacific Ocean builds toward the California coast, resulting in a northwesterly airflow, creating the cool, dry, and stable weather conditions prevalent along the West Coast in summer. They generate unusually large temperature contrasts, and often bring copious Gulf moisture northward, resulting sometimes in cold conditions and possibly-heavy snow or ice north and west of the storm track, and warm conditions, heavy rains and potentially-severe thunderstorms south and east of the storm track - often simultaneously. We apologize for any inconvenience. Reflecting these air-mass conflicts, central Oklahoma, including the Oklahoma City and Moore-Norman areas, has the highest frequency of tornadoes per unit land area on planet Earth, with May the highest-risk month for tornadoes throughout "Tornado Alley," from northern Texas north-northeastward toward western and central Iowa. Alberta and interior British Columbia). The northeastern part of the territory is very wet, with a tropical rainforest climate (Köppen Af). Both the Appalachian region and the Midwest experience the worst floods. The United States is the #1 worst G20 nation when it comes to climate change Thom Dunn 4:04 am Wed Nov 25, 2020 A U.S. flag hangs in front of a burning structure in Black Forest, Colo., June 12, 2013. Across the northern states in winter usually from Montana eastward, "Alberta clipper" storms track east and bring light to moderate snowfalls from Montana and the Dakotas across the upper Midwest and Great Lakes states to New England, and often, windy and severe Arctic outbreaks behind them. The strip of land from north Texas north to Nebraska and east into Southern Michigan is known as Tornado Alley, where many houses have tornado shelters and where many towns have tornado sirens. Other shared climate and vegetation zones are found along their joint border at the southern end of Canada and the northern end of the United States. The U.S. Virgin Islands have a tropical savanna climate, with warm, dry winters, and rainy summers (Köppen Aw), typical of the Caribbean. The book summarizes the scientific literature with respect to climate impacts on the Southeast United States, including 11 southern states to the east of the Mississippi River, Puerto Rico, and the US Virgin Islands; reviews the historic climate, current climate, and the projected future climate of the region; and describes interactions with important sectors of the Southeast and cross-sectoral issues, namely … Late summer and fall extratropical cyclones bring a majority of the precipitation which falls across western, southern, and southeast Alaska annually. Far western Texas (El Paso area) is desert, and average annual precipitation is less than twenty inches (510 mm) in westernmost Kansas and the Oklahoma Panhandle, where the climate qualifies as semi-arid. Teaching Climate Change in the United States is the first-of-its-kind effort to show the breadth and depth at which true climate education – education that engages and empowers young people to take on the defining crisis of our time – is already happening across our country. The greatest annual snowfall level is at Mount Rainier in Washington, at 692 inches (1,758 cm); the record there was 1,122 inches (2,850 cm) in the winter of 1971–72. A humid subtropical climate is found along and south of a mostly east-west line from the Virginia/Maryland capes (north of the greater Norfolk, Virginia area), westward to approximately northern Oklahoma, north of the greater Oklahoma City area.  Hawaii receives even more, with 404 inches (10,262 mm) measured annually, on average, at the Big Bog, in Maui. This results in some increase in humidity and cloud cover, bringing higher nighttime low temperatures and localized thunderstorms to the region, which can result in flash flooding. The land in North America is actually still adjusting to the loss of ice after the last ice age, which peaked about 20,000 years ago. From May to August especially, often-overnight mesoscale-convective-system (MCS) thunderstorm complexes, usually associated with frontal activity, can deliver significant to flooding rainfall amounts from the Dakotas/Nebraska eastward across Iowa/Minnesota to the Great Lakes states. The state of Alaska, on the northwestern corner of the North American continent, is largely dominated by a subarctic climate, but with a subpolar oceanic climate in the southeast (Alaska Panhandle), southwestern peninsula and Aleutian Islands, and a polar climate in the north. American Samoa is south of the equator, and therefore its wet/dry seasons are reversed. Lows range from the 60 °F (16 °C)s in summer to 25 to 35 °F (−4 to 2 °C) in winter. Areas in the southern U.S. (Florida, the Gulf Coast, the Desert Southwest, and southern California) however, often have more stable weather, as the polar jet stream's impact does not usually reach that far south. Baker Ski Area in northwestern Washington which reported 1,140 inches (2,896 cm) of snowfall for the 1998-99 snowfall season. This is a book to encourage and inspire climate educators of all types to know that they are not alone, but are instead … Primarily from August to early October, the coastal Gulf and South Atlantic states are susceptible to being struck by tropical weather systems (tropical depressions, tropical storms, and hurricanes). Minnesota/North Dakota). The polar jet stream (and associated conflict zone between cold, dry air masses from Canada and warm, moist air masses from the Gulf of Mexico) drops further southward into the United States - bringing more frequent periods of stormy weather, with rain, ice and snow, and much more variable temperatures, with rapid temperature rises and falls not uncommon.