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California Wine Atlas

Humboldt County

County

Heat class I · 1991-2020 normals

Climate normals in three numbers

2,342°F-days

, Apr 1 – Oct 31

645 GridMET cells cover this region

I

409mm

season rain, Apr 1 – Oct 31

142 mm of it in the , Sep 1 – Oct 31

Warm and cool vintages since 1980

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Rain across the season, and at harvest

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The boundary

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Hovering a shaded region names it; a click opens its page.

Measured vineyard area

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Drought categories, year by year

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What's in the ground

5.8

pH, 1:1 water

20.1cm

, whole profile

168cm

to

Well drained

, dominant condition

Distribution across 736 · mean ◆, median │, p10–p90 bar

5.8
10.7%
21.5%
available water
20.1cm
depth to restriction
168cm

Dominant

  • 5.4%
  • 5.3%
  • 4.5%
  • 4.5%
  • 4.2%

736 map units · soil described over 99.6% of the region’s area · 4.5% is water, rock outcrop or other non-soil · 28% of the described area has a restrictive layer within the profile.

Sand, silt and clay, against every other appellation

CLAYSANDSILT

Loam

38% sand · 41% silt · 22% clay

Sandier than 31% of California appellations and clayier than 45%. Each grey point is one appellation’s topsoil; appellations nest, so this is a distribution of places rather than of land.

Plus 20% rock fragments by volume, which the triangle does not describe — the three fractions are of the fine-earth material only.

Elevation, slope and aspect

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Bearing acreage by variety

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Price per ton

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