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California Wine Atlas

Glenn County

County

Heat class IV · 1991-2020 normals

Climate normals in three numbers

3,947°F-days

, Apr 1 – Oct 31

252 GridMET cells cover this region

IV

raw 4 km GridMET would say V

121mm

season rain, Apr 1 – Oct 31

35 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

6.4

pH, 1:1 water

14.4cm

, whole profile

104cm

to

Well drained

, dominant condition

Distribution across 485 · mean ◆, median │, p10–p90 bar

6.4
1.8%
28.5%
available water
14.4cm
depth to restriction
104cm

Dominant

  • 11.4%
  • 8.6%
  • 7.1%
  • 5.0%
  • 4.9%

485 map units · soil described over 94.5% of the region’s area · 7.6% is water, rock outcrop or other non-soil · 68% of the described area has a restrictive layer within the profile.

Sand, silt and clay, against every other appellation

CLAYSANDSILT

Clay loam

32% sand · 40% silt · 29% clay

Sandier than 10% of California appellations and clayier than 86%. Each grey point is one appellation’s topsoil; appellations nest, so this is a distribution of places rather than of land.

Plus 13% 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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