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According to the new map released in November 2023, about half of the United States has shifted to a new hardiness zone. That's really big news if you consider 80 million Americans use this map to ...
On the 2012 Plant Hardiness Zone map, Greater Columbus (and a good portion of the rest of Ohio) was in Zone 6a, where the average lowest temperature ranges from -10 to -5 degrees Fahrenheit ...
For example, Seattle, Washington, and the city of Austin, Texas, are both in the USDA hardiness zone 9a because the map is a measure of the coldest temperature a plant can handle.
For practical purposes, Canada has adopted the American hardiness zone classification system. The 1990 version of the USDA Plant Hardiness Zone Map included Canada and Mexico, but they were removed with the 2012 update to focus on the United States and Puerto Rico. [8] The Canadian government publishes both Canadian and USDA-style zone maps. [37]
Hardiness of plants is defined by their native extent's geographic location: longitude, latitude and elevation. These attributes are often simplified to a hardiness zone. In temperate latitudes, the term most often describes resistance to cold, or "cold-hardiness", and is generally measured by the lowest temperature a plant can withstand.
Winter is cool with occasional rain storms and snow showers. January daily high temperatures are usually between 50–60 °F (10–16 °C) with lows just below freezing. On average, the lowest winter temperature is 14 °F (−10 °C), putting the area in hardiness zone 8A. Spring starts slowly but then gets warmer in April and is usually a ...
The new data is based on 1991-2020 GIS data collected from over 13,000 weather stations.
The city falls within USDA plant hardiness zone 9b (25 to 30 °F/-3.9 to -1.1 °C). [ 31 ] [ 32 ] Climate data for Visalia, California, 1991–2020 normals, extremes 1898–present