Diablo Grande
AVA · Stanislaus County · District 12
27 CFR 9.156 · established 1998-06-22
Heat class V · 1991-2020 normals
Climate normals in three numbers
, Apr 1 – Oct 31
18 GridMET cells cover this region
season rain, Apr 1 – Oct 31
21 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
Hovering a shaded region names it; a click opens its page.
Measured vineyard area
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Drought categories, year by year
Stanislaus County — not Diablo Grande
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What's in the ground
7.7
pH, 1:1 water
7.7cm
, whole profile
54cm
to
Well drained
, dominant condition
Distribution across 17 · mean ◆, median │, p10–p90 bar
Dominant
- 48.4%
- 46.2%
- 3.1%
- 1.5%
- 0.6%
17 map units · soil described over 100.0% of the region’s area · 10.9% is water, rock outcrop or other non-soil · 97% of the described area has a restrictive layer within the profile.
Sand, silt and clay, against every other appellation
Loam
51% sand · 30% silt · 19% clay
Sandier than 75% of California appellations and clayier than 28%. Each grey point is one appellation’s topsoil; appellations nest, so this is a distribution of places rather than of land.
Plus 12% 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
Stanislaus County · District 12
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Price per ton
Stanislaus County · District 12
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The appellation in federal law
The boundary, in the government’s own words (181 words)
(c) Boundary. The Diablo Grande viticultural area is located in the western foothills of Stanislaus County, California. The beginning point is at Reservoir Spillway 780 in section 8, Township 6 South, Range 7 East (T. 6S., R. 7E.) on the Patterson Quadrangle U.S.G.S. map. (1) Then proceed northwest to Salt Grass Springs to the point where the 1000 foot contour line crosses the northern section line of section 9, T. 6S., R. 6E., on the Copper Mtn., Quadrangle U.S.G.S. map. (2) Then proceed due south past Copper Mountain in section 16, T. 6S., R. 6E., to Mikes Peak in section 4, T. 7S., R. 6E., on the Wilcox Ridge Quadrangle U.S.G.S. map. (3) Then proceed due west to Oristimba Creek in section 6, T. 7S., R. 6E. (4) Then proceed following Orestimba Creek south/southeast and then east/northeast to the point where Orestimba Creek meets Bench Mark #340 in section 28, T. 7S., R. 7E., on the Orestimba Peak Quadrangle U.S.G.S. map. (5) Then proceed northwest to the point of beginning at Reservoir Spillway 780 in section 8, T. 6S., R. 7E.