Historical Plant Hardiness Zones
Time Period:
1986 to 2005

Why is this time period used?This historical period represents the current or recent climate, spanning enough time to capture variations that impact productivity, such as severe droughts and cool seasons.More info.: About historical data

a

Zone 1a: -60°F to -55°F

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Zone 1b: -55°F to -50°F

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Zone 2a: -50°F to -45°F

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Zone 2b: -45°F to -40°F

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Zone 3a: -40°F to -35°F

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Zone 3b: -35°F to -30°F

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Zone 4a: -30°F to -25°F

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Zone 4b: -25°F to -20°F

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Zone 5a: -20°F to -15°F

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Zone 5b: -15°F to -10°F

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Zone 6a: -10°F to -5°F

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Zone 6b: -5°F to 0°F

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Zone 7a: 0°F to 5°F

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Zone 7b: 5°F to 10°F

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Zone 8a: 10°F to 15°F

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Zone 8b: 15°F to 20°F

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Zone 9a: 20°F to 25°F

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Zone 9b: 25°F to 30°F

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Zone 10a: 30°F to 35°F

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Zone 10b: 35°F to 40°F

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Zone 11a: 40°F to 45°F

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Zone 11b: 45°F to 50°F

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Zone 12a: 50°F to 55°F

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Zone 12b: 55°F to 60°F

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Zone 13a: 60°F to 65°F

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Zone 13b: 65°F to 70°F

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Historical Average







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?About The Time Series

What does this plot show?The time series plot shows the historical conditions and the spread of future projections using two emissions scenarios for your selected location.More info.: About the time series plot

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Historical average
Spread of likely outcomes under reduced/moderate emissions

What does this range represent?This confidence interval represents the spread of projections across 20 climate model simulations with reduced/moderate emissions levels.More info.: About emissions scenarios

Spread of likely outcomes under current/high emissions

What does this range represent?This confidence interval represents the spread of projections across 20 climate model simulations with current/high emissions levels.More info.: About emissions scenarios

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