California Weather Alert: Frost Advisory in Trinity County Tonight With Temps Dropping to 31°F

Residents in Trinity County are being urged to prepare for freezing conditions overnight, as a Frost Advisory remains in effect through early Tuesday morning. The National Weather Service in Eureka warns that temperatures could fall to near or below freezing in several interior valley communities, increasing the risk of frost-related damage to plants, pets, and plumbing. The advisory is in place from midnight to 8 a.m. Tuesday, with the coldest temperatures expected in low-lying valley areas such as Hayfork, Weaverville, and Trinity Center. These locations are particularly vulnerable to nighttime cooling due to elevation and topography.

Hayfork Could Dip to 31°F; Weaverville Slightly Warmer

Forecasters expect overnight lows around 31°F in Hayfork, with surrounding areas like Weaverville and Trinity Center forecast to drop to the mid-30s. While these temperatures may not seem extreme, even brief exposure to frost can harm delicate spring vegetation, particularly new plantings or blossoming flowers. Pets left outdoors overnight could also face discomfort or health risks from the chill, and unprotected outdoor water pipes may be vulnerable to freezing and cracking. The National Weather Service recommends bringing pets inside, covering plants with breathable materials, and insulating any exposed plumbing to prevent costly damage.

Pattern Continues After Recent Chilly Nights

This advisory follows a pattern of cool spring nights across inland Northern California, particularly in higher-elevation and interior valley areas. Residents of Trinity County have already experienced several chilly evenings this April, but tonight’s forecasted temperatures could be among the coldest of the month so far. Late-season frosts are not unusual in this part of the state, but they often catch gardeners and homeowners off guard, especially after warmer daytime weather encourages early planting. Officials say that extra care should be taken to safeguard any vulnerable vegetation or infrastructure.

Advisory May Be Extended if Cold Weather Persists

The current Frost Advisory is set to expire at 8 a.m. Tuesday, as the rising sun and warmer air should lift temperatures above freezing. However, the National Weather Service cautions that additional advisories may be issued later this week if similar conditions persist. Residents are advised to stay informed through local news, emergency alerts, or direct updates from the NWS, especially in communities with limited frost protection infrastructure. Being proactive now can help prevent plant loss, pipe damage, and pet exposure. This cold snap serves as a reminder that while spring has officially arrived, winter-like temperatures can still make a return, particularly overnight in Northern California’s more remote regions.