Los Carneros AVA

1
Los Carneros AVA

• ClimateCool, with prevailing marine air from
  San Pablo Bay high temps rarely exceed 80F
  (27C) less diurnal variation
• ElevationSea level to 700 ft (214 m)
• Rainfall Lowest in Napa Valley 18 to 24
  inches (45.7 to 61 cm) annually
• Soils Clay dominated, shallow, more loam and
  hillside alluvials in the northern section
  yields typically restrained by the hard claypan
  subsoil, which prevents deep rooting
• Principal varietiesChardonnay, Merlot, Pinot
  Noir

2
Coombsville

• ClimateTemperate climate moderated by
  near-proximity to the San Francisco Bay and the
  influences of marine air
• ElevationMost vineyards are in the 100-500 foot
  (30-150 m) zone, though a small portion tops 1000
  feet (300 m)
• Rainfall Average rainfall is 24.6 inches (62
  cm) per year over the last 100 years
• Soils
• Primarily weathered volcanic rock and alluvial
  deposits from the Vaca Range that surrounds the
  region
• Principal varietiesDominated by Cabernet
  Sauvignon on the hillsides with Merlot,
  Chardonnay, Syrah and Pinot Noir in the lower,
  cooler sites

3
Oak Knoll District ofNapa Valley AVA

• ClimateModerate to cool with morning fall
  late afternoon breezes and slightly cooler
  temperatures than upper valley temperatures may
  reach 90F (32.2C) and drop to around 50F
  (10C) at night
• ElevationSea level to 800 ft (244 m)
• Rainfall 36 inches (91 cm) annually
• Soils The valleys largest alluvial fan formed
  by Dry Creek northwest area is composed of
  volcanically derived soils, with stony or
  gravelly consistency south and east areas
  transition from gravel to silty clay loam
• Principal varietiesMerlot, Cabernet Sauvignon,
  Chardonnay

4
Yountville AVA

• ClimateModerate, with marine influence and
  fog cool summer mornings and breezes keep
  afternoons comfortable peak temperatures may
  reach 90F (32.2C), with noticeable diurnal
  fluctuation to the mid-50F range (13C)
• ElevationSea level to 1100 ft (335 m)
• Rainfall 32 inches (81 cm) annually
• Soils Principally gravelly silt loams,
  sedimentary in origin, and gravelly alluvial
  soils with rock, moderately fertile
• Principal varietiesCabernet Sauvignon, Merlot

5
Stags Leap District AVA

• ClimateModerately warm, afternoon marine winds
  which cool the warmer air radiating off the bare
  rocks of the surrounding hillsides often warmer
  than neighboring Yountville AVA, reaching the
  mid-90F range (35C)
• Elevation66 to 400 ft (20 to 122 m)
• Rainfall 30 inches (76 cm) annually
• Soils Volcanic gravel-loams on the floor, with
  rocky hillsides, and low-to moderate fertility
  due to hard clay bedrock sub-soils
• Principal varietiesCabernet Sauvignon, Merlot,
  Sangiovese, Chardonnay, Sauvignon Blanc

6
Oakville AVA

• ClimateModerately warm, temperatures can reach
  the mid-90F (35C), but also strongly affected
  by fog, which helps keep acidity levels good
  east side of the AVA receives more of the warmer
  afternoon sun
• Elevation75 to 500 ft (23 to 152 m)
• Rainfall 35 inches (89 cm) annually
• Soils Primarily sedimentary gravelly alluvial
  loams on the west, with more volcanic but heavier
  soils on the east kow-to-moderate fertility and
  fairly deep
• Principal varietiesCabernet Sauvignon, Merlot,
  Sauvignon Blanc

7
Rutherford AVA

• ClimateModerately warm, somewhat influenced by
  fog western bench cooler, with less late
  afternoon sun summer peak temperatures are
  mid-90F (35C) with good diurnal range
• Elevation100 to 500 ft (30 to 152 m)
• Rainfall 38 inches (97 cm) annually
• Soils West side is sedimentary, gravelly-sandy
  and alluvial, with good water retention and
  moderate fertility east side has more volcanic
  soils, moderately deep, more fertile
• Principal varietiesCabernet Sauvignon, Merlot,
  Cabernet Franc, Zinfandel

8
St. Helena AVA

• ClimateWarm, due to protection from hills less
  fog and wind narrowing of the valley floor
  provides more heat reflection off the hillsides
  temperatures can peak in the mid-to-high 90F
  range (35 to 37C)
• Elevation150 to 600 ft (46 to 183 m)
• Rainfall 38 to 40 inches (97 to 102 cm)
  annually
• Soils South and west borders are more
  sedimentary, gravel-clay soils, with lower
  fertility and moderate water retention to the
  north and east, soils are prevalently
• volcanic in origin and are deeper and more
  fertile
• Principal varietiesCabernet Franc, Cabernet
  Sauvignon, Merlot, Syrah, Viognier, Zinfandel

9
Spring Mountain District AVA

• ClimateNoted for steeper, smaller hillside
  vineyards surrounded by tall evergreen forest
  cooler daytime temperatures than valley floor,
  generally not exceeding 85F (29.4C)
• Elevation400 to 2200 ft (122 to 671 m)
• Rainfall 50 inches (127 cm) annually
• Soils Primarily sedimentary weathered
  sandstone/shale, loamy and friable in texture
  drainage is high, fertility low
• Principal varietiesCabernet Sauvignon, Merlot,
  Zinfandel, Chardonnay, Viognier

10
Diamond Mountain District AVA

• ClimateModerately warm temperatures with lower
  maximums and higher minimums temperatures than
  the north
• Elevation400 to 1800 ft (122 to 549 m)
• Rainfall 50 to 55 inches (127 to 140 cm)
  annually
• Soils Residual uplifted soils of volcanic
  origin, often reddish and very fine grained, even
  gritty in texture, composed of both weathered
  sedimentary and volcanic origin
• Principal varietiesCabernet Sauvignon, Cabernet
  Franc

11
Howell Mountain District AVA

• ClimateGenerally above marine layer slightly
  warmer and drier than across the valley, with
  strong afternoon sun summer temperatures range
  from 55F to the high 90F (13 to 37C) cool
  nights help maintain good acidity
• Elevation600 to 2200 ft (183 to 671 m)
• Rainfall 42 inches (107 cm) annually
• Soils Predominantly volcanic, shallow and
  infertile drainage is high, fertility low
• Principal varietiesCabernet Sauvignon, Merlot,
  Zinfandel, Viognier

12
Mount Veeder AVA

• ClimateCool to moderate, with most vineyards
  above the fog line warmer nights and cooler days
  than valley floor typical mid-summer high
  temperatures top out at about 85F (30C)
• Elevation500 to 2600 ft (153 to 793 m)
• Rainfall 45 inches (114.3 cm) annually
• Soils Sedimentary based, shallow and generally
  well-drained, as well as more acidic, with low
  fertility most have a sandy-loam texture
• Principal varietiesCabernet Sauvignon, Merlot,
  Zinfandel, Chardonnay

13
Atlas Peak AVA

• ClimateCool, mountain-influenced, with
  temperatures about 10 to 15F cooler than valley
  floor in summer above the fog line low diurnal
  change, with summer temperatures rarely above
  90F (32.2C)
• Elevation400 to 2600 ft (122 to 793 m)
• Rainfall 34 inches (86 cm) annually
• Soils Volcanic in origin, with basaltic red
  color, shallow with limited water retention
  irrigation is often essential
• Principal varietiesCabernet Sauvignon,
  Chardonnay

14
Chiles Valley District AVA

• ClimateWarmer summer days, mid-80sF plus
  (29.4C), but due to higher elevation and fog
  that forms after sunset, falls to 50F (10C) or
  lower at night colder winters and spring, with
  strong winds harvest comes later
• Elevation600 to 1200 ft (183 to 370 m)
• Rainfall 35 inches (88 cm) annually
• Soils Floor is primarily alluvial soils with
  silty-clay composition of marine origin, with
  good fertility hillsides show more clay-loam and
  stony-clay composition, mostly marine in origin,
  with some volcanic outcropping, and less
  fertility
• Principal varietiesCabernet Sauvignon, Cabernet
  Franc, Merlot

15
Calistoga AVA

• ClimateWarm to hot, depending upon time of
  year lower humidity summer temperatures peak to
  90F (32.2C) and fall to low 50sF (11C), the
  result of marine air from the northwest cool
  afternoon and evening breezes
• Elevation300 to 1200 ft (92 to 370 m)
• Rainfall 38 to 60 inches (96.5 to 150 cm)
  annually
• Soils Almost completely of volcanic origin,
  soils range from rocky, stony loam on the
  hillsides, to gravelly or cobbly loams on the
  alluvial fans, to heavierclay-slit soils in the
  valley center areas
• Principal varietiesCabernet Sauvignon,
  Zinfandel, Syrah, Petite Sirah

16
Wild Horse Valley AVA

• ClimateA warmer area well to the east, but
  still moderated by both altitude and prevailing
  winds coming off Suisun Bay to the southeast.
• Elevation600 to 1900 ft (186 to 589 m)
• Rainfall31 inches (79 cm) annually
• SoilsThe parent material consists primarily of
  sedimentary and igneous sources. Most of the
  soils are shallow with limited water retention,
  so irrigation is often essential
• Principal varietiesCabernet Sauvignon, Pinot
  Noir and Chardonnay