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Average Distribution of Dew Point Temperatures, January

United StatesPhysical Environment

Average January dew points for the contiguous United States

nature

A map displays the average distribution of dew point temperatures across North America in January, using different colors to represent various temperature ranges.

Less than 20 degrees Fahrenheit (Red): Covers most of the United States, excluding the southern and coastal areas, extending into Canada and northern Mexico.

20 degrees Fahrenheit (Blue): North Texas, Oklahoma, Arkansas, Tennessee, North Carolina, Kentucky, eastern Washington, Eastern Oregon, Idaho, and some part of Utah.

30 degrees Fahrenheit (Purple): Most of California along the coast, western Oregon, western Washington, central Texas, northern Louisiana, Alabama, Georgia, and South Coalinga.

40 degrees Fahrenheit (Orange): Covers parts of southern Texas, Louisiana, south of Georgia and north of Florida.

50 degrees Fahrenheit (Yellow): Southcentral region of Florida.

55 degrees Fahrenheit (Green): Restricted to the southern tip of Florida.

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Average Distribution of Dew Point Temperatures, January

Irrigated Crop Intensity

Lightning Frequency

Less than 20°F

20–29°F

30–39°F

40–49°F

50–54°F

55–59°F

Class

Rank

Percent

Lightning Frequency

<0.1 flashes/km²/year

0.1 flashes/km²/year

0.2 flashes/km²/year

0.4 flashes/km²/year

0.6 flashes/km²/year

0.8 flashes/km²/year

1 flash/km²/year

2 flashes/km²/year

4 flashes/km²/year

6 flashes/km²/year

8 flashes/km²/year

10 flashes/km²/year

20 flashes/km²/year

30 flashes/km²/year

69.8%31.1%23.3%22.8%21.0%7.07%24.4%16.4%8.63%6.27%9.50%4.67%3.58%14.1%25.7%10.1%11.3%14.8%42.6%30.6%47.1%
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