Zone 6 can expect minimum average temperatures of -10 to -0 degrees F Owing to its position in the Atlantic, its latitude and the effects of the Gulf Stream, the European Macaronesia has by far the warmest winters out of any place in Europe. USDA Hardiness Zone 6 covers a large portion of the United States. Estonia is divided to warmer West and North coast (Tallinn 6a, Haapsalu 7b, Kärdla 7a, Kuressaare 7a, Paide 6a, Rakvere 6a, Narva 6a, Viljandi 6b) and colder inland (Tartu 5a, Valga 5a, Võru 5a). X₇ = maximum wind gust in (km/hr) in 30 years. Learn how and when to remove this template message, "History of Plant Hardiness Zone Maps – The Rest of the Story", "New arborday.org Hardiness Zone Map reflects warmer climate : Latest hardiness zones, based on most current temperature data available, suggest up-to-date choices for best trees to plant", "What's New | USDA Plant Hardiness Zone Map", "Beyond Traditional Hardiness Zones: Using Climate Envelopes to Map Plant Range Limits", "Die Wärmezonen der Erde, nach der Dauer der heissen, gemässigten und kalten Zeit und nach der Wirkung der Wärme auf die organische Welt betrachtet [The thermal zones of the Earth according to the duration of hot, moderate and cold periods and of the impact of heat on the organic world]", "Projected changes in cold hardiness zones and suitable overwinter ranges of perennial crops over the United States", "Natural Resources Canada – Plant Hardiness of Canada", "Woody Ornamental Plant Zonation: III. A hardiness zone is a geographic area defined to encompass a certain range of climatic conditions relevant to plant growth and survival. Many zone boundaries were changed as a result of the more recent data, as well as new mapping methods and additional information gathered. As an extreme example, most of the United Kingdom is in zones 8–9, while in the US, zones 8–9 include regions such as the subtropical coastal areas of the southeastern US and Mojave and Chihuahuan inland deserts, thus an American gardener in such an area may only have to plan for several days of cold temperatures per year, while their British counterpart may have to plan for several months. Unless otherwise specified, "hardiness zone" or simply "zone" usually refers to the USDA scale. The warmest zone in the 48 contiguous states is the Florida Keys (11b) and the coldest is in north-central Minnesota (3a). Thus, regions with the same winter minima but different summer temperature will be assigned same hardiness zone. An extreme example of a cold sink is Funtensee, Bavaria which is at least in zone 3 and maybe even in zone 1 or 2. The hardiness zones are further broken down into 5-degree increments and labeled as 6a and 6b, with the regions in 6b being 5 degrees warmer than 6a. Tromsø, a coastal city in Norway at 70°N, is in zone 7, and even Longyearbyen, the northernmost true city in the world at 78°N, is still in zone 4. Coastal Ireland and Miami are both Zone 10, but have radically different insolation and summer heat and humidity. In addition to the USDA Hardiness zones there are American Horticultural Society (AHS) heat zones. This hardiness zone map from the Australian National Botanic Gardens represents a modified version of the USDA zones, because, as the website says, "This is because Australia, in winter, is much warmer than most of North America in winter, so the lowest US zones aren't needed. Planten die geschikt zijn voor de zones 8 en hoger, hebben op zijn minst een warme standplaats nodig en wellicht ook een winterdek. The Australian National Botanic Gardens have devised another system more in keeping with Australian conditions. Keep reading to learn more. In the United States, most of the warmer zones (zones 9, 10, and 11) are located in the deep southern half of the country and on the southern coastal margins. The range of minimum average temperatures for zone 6 is between -10°F and 0°F or -23.3°C and -17.8°C. The low latitude and often stable weather in Florida, the Gulf Coast, and southern Arizona and California, are responsible for the rarity of episodes of severe cold relative to normal in those areas. {\displaystyle Y=-67.62+1.734X_{1}+0.1868X_{2}+69.77X_{3}+1.256X_{4}+0.006119X_{5}+22.37X_{6}-0.01832X_{7}}.

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