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California Wine Atlas

Tehama County

County

Heat class IV · 1991-2020 normals

Climate normals in three numbers

3,731°F-days

, Apr 1 – Oct 31

520 GridMET cells cover this region

IV

203mm

season rain, Apr 1 – Oct 31

59 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

6.2

pH, 1:1 water

10.3cm

, whole profile

81cm

to

Well drained

, dominant condition

Distribution across 613 · mean ◆, median │, p10–p90 bar

6.2
2.3%
20.1%
available water
10.3cm
depth to restriction
81cm

Dominant

  • 14.6%
  • 10.5%
  • 7.4%
  • 4.6%
  • 4.0%

613 map units · soil described over 95.4% of the region’s area · 8.1% is water, rock outcrop or other non-soil · 82% of the described area has a restrictive layer within the profile.

Sand, silt and clay, against every other appellation

CLAYSANDSILT

Loam

45% sand · 35% silt · 20% clay

Sandier than 63% of California appellations and clayier than 34%. Each grey point is one appellation’s topsoil; appellations nest, so this is a distribution of places rather than of land.

Plus 24% 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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