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California Wine Atlas

Winters Highlands

AVA · Yolo County · District 9, 17 — 72.5% of this appellation; also in Solano (27.5%)

27 CFR 9.290 · established 2023-08-29

Heat class V · 1991-2020 normals

Climate normals in three numbers

4,312°F-days

, Apr 1 – Oct 31

7 GridMET cells cover this region

V

85mm

season rain, Apr 1 – Oct 31

25 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

This boundaryClick to open

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

Measured vineyard area

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Drought categories, year by year

Yolo County — not Winters Highlands

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What's in the ground

7.0

pH, 1:1 water

21.3cm

, whole profile

131cm

to

Well drained

, dominant condition

Distribution across 38 · mean ◆, median │, p10–p90 bar

7.0
1.5%
29.1%
available water
21.3cm
depth to restriction
131cm

Dominant

  • 23.6%
  • 23.6%
  • 18.7%
  • 10.7%
  • 9.5%

38 map units · soil described over 96.0% of the region’s area · 3.6% is water, rock outcrop or other non-soil · 53% of the described area has a restrictive layer within the profile.

Sand, silt and clay, against every other appellation

CLAYSANDSILT

Clay loam

28% sand · 43% silt · 29% clay

Sandier than 4% of California appellations and clayier than 87%. Each grey point is one appellation’s topsoil; appellations nest, so this is a distribution of places rather than of land.

Plus 5% 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

Yolo County · District 9, 17 — 72.5% of this appellation; also in Solano (27.5%)

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Price per ton

Yolo County · District 9, 17 — 72.5% of this appellation; also in Solano (27.5%)

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The appellation in federal law

The boundary, in the government’s own words (303 words)

(c) Boundary. The Winters Highlands viticultural area is located in portions of Solano and Yolo Counties, California. The boundary of the Winters Highlands viticultural area is as follows: (1) The boundary begins on the Winters map at the intersection of Putah Creek Road and Wintu Way. From the beginning point, proceed southeasterly along Wintu Way, crossing onto the Allendale map, to the terminus of Wintu Way; then (2) Proceed south-southwest in a straight line for 1.05 miles to the eastern terminus of Morse Lane; then (3) Proceed westerly along Morse Lane to its intersection with Olive School Lane; then (4) Proceed north-northwest in a straight line for 2.52 miles, crossing over the northeastern corner of the Mount Vaca map and onto the Monticello Dam map, to the line's intersection with Highway 128, approximately 2.78 miles west of the intersection of Highway 128 and County Road 89; then (5) Proceed north in a straight line to the intersection of the line with the Chickahominy Slough; then (6) Proceed east-southeast along the Chickahominy Slough, crossing onto the Winters map, to its intersection with the 170-foot elevation contour; then (7) Proceed south-southeasterly along the 170-foot elevation contour to its intersection with the Winters Canal; then (8) Proceed south along the Winters Canal to its intersection with the terminus of an unnamed local road; then (9) Proceed due west in a straight line to the 200-foot elevation contour; then (10) Proceed south in a straight line to the northern terminus of County Road 88; then (11) Proceed south along County Road 88 to its southern terminus and continue south in a straight line to Valley Oak Drive; then (12) Proceed southerly along Valley Oak Drive to its intersection with Highway 128; then (13) Proceed southeasterly in a straight line for 1.04 miles, returning to the beginning point.