Eastern valley, foothills, & west slope

Includes, but not limited to: Sacramento, Fair Oaks, Orangevale, Gold River, Rancho Cordova, Folsom, El Dorado Hills, Roseville, Rocklin, Granite Bay, Loomis, Newcastle, Auburn, Grass Valley, Foresthill, Meadow Vista, Colfax, Cool, Coloma, Placerville, Cameron Park, Elk Grove, Plymouth, Jackson, Ione, Valley Springs, San Andreas, Sonora, Farmington, Yuba City, Oroville, Chico, & Paradise. Cities & towns nearby (within 10 miles) of each aforementioned location can be assumed/included in this forecast.

Monday, May 29

 High temperatures: 72 – 80 °F

Tuesday, May 30

 High temperatures: 71 – 79 °F

Wednesday, May 31

 High temperatures: 73 – 80 °F

Thursday, June 1

 High temperatures: 77 – 86 °F

Friday, June 2

 High temperatures: 81 – 90 °F

Saturday, June 3

 High temperatures: 86 – 94 °F

Sunday, June 5

 High temperatures: 90 – 99 °F

Forecast details (5/29/23)

Near daily showers and thunderstorms in the higher terrain will continue through about mid-week, as the slow cutoff low finally starts to eject eastward into the Four Corners region. This will support ridging replacing the small cutoff low, with temperatures increasing through the week from 70s in many areas to potentially nearing 100 degrees in the valley by the weekend.

Snake activity will go from maxing out during the afternoon hours Mon – Wed, to slowly becoming most likely in the morning & evening hours by the weekend, as daytime highs begin to become too hot in the afternoon for much activity in areas with little tree cover or other large scale shade. Overnight lows also appear to warm through the weekend, with overnight lows beginning to only drop into the 60s by the weekend, meaning snake activity can continue late into the night.

A trough may begin to approach the west coast next week, leading to a stronger onshore breeze & cooler temperatures, however the track of the trough is important — as if it cuts off once again, it could stay offshore and support mountain thunderstorms all the while staying very warm. Stay tuned for next weeks forecast update on Sunday or early Monday.

Date & time last updated: Monday, 5/29/2023, at 3:05 PM

Next update: 6/4/2023 – 6/5/2023

How the forecast works

Snake activity is heavily driven by weather conditions, not just large-scale seasonal changes such as the shift from Winter to Spring or Summer to Fall. While time of year has an impact on snake activity, it’s primarily driven by various meteorological factors including, but not limited to, surface/air temperature, cloud cover, humidity, and more.

Placer Snake Removal’s weekly snake activity conditions forecast combines large-scale seasonal trends, in addition to & perhaps more importantly, daily weather conditions. The forecast breaks the day up into 4 pieces: morning, afternoon, evening, and overnight. Each day chunk includes the expected quality level for rattlesnakes to be active. A conditions forecast of “Low” means that the conditions are not expected to be particularly ideal for rattlesnakes to be active for long periods of time at the surface. A conditions forecast of “High” means forecast conditions are likely to be very supportive of rattlesnake activity at the surface.

The forecast for each week is created the Sunday night prior.

Do not rely on information from these forecasts for personal safety & always practice venomous snake awareness/safety no matter temperature or weather.

Forecast key & description

Low – conditions not ideal for surface activity.

Low medium – conditions may support small amounts of activity.

Medium – conditions supportive of some activity, perhaps short-range travel.

Mediumhigh – conditions supportive of activity, including travel.

High – conditions very supportive & comfortable for all forms of activity.

Forecast Zone Boundaries