Lake County Climate

For detailed information on the effect of climate in the Lake County winegrowing region, download this 2015 report by Dr. Gregory Jones PhD, Southern Oregon University.

Lake County’s winegrape regions are the beneficiaries of ideal climate conditions that complement the pure air, elevated locales, and rich, varied soils.

Clear Lake, the valley floors, the surrounding mountain ranges, and Lake County’s proximity to the Pacific Ocean are factors in the microclimates found in the region’s AVAs – High Valley, Kelsey Bench, Middletown, Big Valley, Red Hills, and Upper Lake.

Most of Lake County experiences a mix of bright sunlight bringing warm days and afternoon breezes that bring cooling that often results in 50-degree diurnal cycles.

Climate Page (Beckstoffer, Red Hills)

In the High Valley AVA, elevation along with the cooling effects of Clear Lake create a natural and perpetual “wind machine.” During July and August, daily temperature swings of 50 degrees are not uncommon. This intense cooling effect promotes good acidity, improved tannic structure, darker color, and more concentrated fruit character.

Lake County’s wine grapes enjoy high levels of UV light due to climate and clean air. UV levels can reach up to 10 percent more than regions in neighboring sea level valleys. This UV intensity triggers thicker winegrape skins, greater tannins, and intense wines with high phenolic content.

With vineyards starting at 1,350 feet and reaching up to 2,600 feet above sea level, Red Hills of Lake County grapes are grown in mountain climate conditions. Upper level airflows from the Pacific Ocean combine with local convections to moderate daytime highs. Low relative humidity and varied topography permit quick radiative cooling of ridgetop vineyards in the late afternoon and evenings. Both factors allow for good acid retention during ripening.

Grapes grown in the Upper Lake AVA at 3,000-4,000 feet in elevation are surrounded by the Mayacamas range and the mountains of the Mendocino National Forest which impart a strong influence on the local climate. Summer’s heat loses its grip in September when temperatures swing dramatically from morning chill to afternoon warmth. The cool nights preserve the acidity of the grapes and slow the ripening process, enhancing the flavor and complexity of the wine.

Cold winters and dry summer conditions throughout the regions are important factors in Lake County’s reduced pesticide and other application rates, one of the lowest in California.

Calendar of Events

Sun Mon Tue Wed Thu Fri Sat
1
2
3
LCWC Board Meeting 4:00 pm
LCWC Board Meeting @ LCWC Office
Dec 3 @ 4:00 pm – 5:15 pm
Agenda – LCWC Board Meeting, December 3, 2019
4
Crop Insurance Webinar Series 10:00 am
Crop Insurance Webinar Series
Dec 4 @ 10:00 am – 11:00 am
Crop Insurance Webinar Series
Crop Insurance 101 As the harvest season wraps up, it’s time to start planning for next year. An important part of your 2020 planning process is risk management of your most valuable asset – –[...]
5
6
7
8
9
10
11
Crop Insurance Webinar Series 10:00 am
Crop Insurance Webinar Series
Dec 11 @ 10:00 am – 11:00 am
Crop Insurance Webinar Series
Crop Insurance 102 Whether you are new to crop insurance or you’ve been purchasing it for many years, CAWG is committed to bringing you education on the most current industry topics. Our Crop 102 webinar[...]
12
13
UCCE Lake & Mendocino IPM Seminar 7:30 am
UCCE Lake & Mendocino IPM Seminar @ UC Hopland Research and Extension Center
Dec 13 @ 7:30 am – 5:00 pm
22nd Annual UCCE Lake & Mendocino IPM Seminar   UC Hopland Research and Extension Center 4070 University Road, Hopland Rod Shippey Hall Friday, December 13, 2019 Doors open 7:30 am for Registration Seminar starts at[...]
14
15
16
17
18
Crop Insurance Webinar Series 10:00 am
Crop Insurance Webinar Series
Dec 18 @ 10:00 am – 11:00 am
Crop Insurance Webinar Series
Whole Farm Revenue Protection Want to protect your crop against price and market losses? Maybe Whole Farm Revenue Protection (WFRP) is for you! Join CAWG on Wednesday, December 18th at 10:00 am to learn more[...]
19
20
21
22
23
24
25
26
27
28
29
30
31