What is today's weather forecast for Janesville, CA?

Today's forecast for Janesville shows a low of 36 degrees Fahrenheit. Partly cloudy, with a low around 36.

What is the 7-day weather forecast for Janesville, CA?

The 7-day forecast for Janesville shows highs from 42 to 56 degrees and lows from 34 to 41 degrees Fahrenheit. Expect precipitation on 7 days with chances of 20% or higher.

Will it rain in Janesville, CA this week?

Yes, rain is possible in Janesville this week. Precipitation chances: Thursday (60% chance), Friday (90% chance), Saturday (80% chance), Sunday (50% chance), Monday (50% chance), Tuesday (50% chance), Wednesday (50% chance).

How accurate is the Janesville weather forecast?

WeatherForYou provides highly accurate Janesville forecasts using National Weather Service data and current conditions from the nearest available weather stations, often miles closer than regional airports, for the most precise local forecasts.

Janesville, CA Weather Forecast and Current Conditions

Current Conditions From Nearby Local Station

Switch to Metric Units

49°F
Feels Like 47°F

Humidity 56% Dew Point 34°F Wind WSW 5 MPH Gusts 8 Barometer N/A

Report from a MADIS/MESONET weather station 0.8 mi. ESE of central Janesville
at 5:13 PM Wed, Dec 17, 2025

Point Forecast at a Glance

WedDec 17

ThuDec 18

FriDec 19

90%

SatDec 20

70%

SunDec 21

50%

MonDec 22

50%

TueDec 23

50%

Jump to detailed forecast ↓

7-Day Temperature Trend

Week Ahead Summary

Cooling trend continues with high temperatures dropping from 56°F to 46°F. Unsettled weather expected with rain or snow likely on at least 6 days.

Climate Context

This week's forecast shows temperatures running 7°F above the historical average for December. Normal highs for this period are around 42°F with lows around 23°F.

This Date in Weather History

1987 - A storm in the southwestern U.S. brought heavy rain and heavy snow to parts of California, Nevada, Arizona, Utah and New Mexico. Charleston NV was blanketed with 12 inches of snow. Lake Havasu City AZ was drenched with 2.26 inches of rain.

Janesville, CA 7 Day Weather Forecast Details

Wednesday Dec 17

Night: Partly cloudy, with a low around 36. Northwest wind around 5 mph.

Thursday Dec 18

Day: Mostly sunny, with a high near 56. Northwest wind 5 to 10 mph becoming southwest in the afternoon. Winds could gust as high as 25 mph.

Night: Rain likely, mainly after 4am. Snow level 7200 feet. Partly cloudy, with a low around 41. Southwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 60%.

Friday Dec 19

Day: Rain. High near 49. Southwest wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

Night: Rain. Snow level 7800 feet lowering to 7200 feet after midnight . Low around 41. Southwest wind around 10 mph, with gusts as high as 30 mph. Chance of precipitation is 90%.

Saturday Dec 20

Day: Rain likely. Snow level 6800 feet. Mostly cloudy, with a high near 51. Southwest wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.

Night: Rain. Low around 41. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

Sunday Dec 21

Day: Rain. Cloudy, with a high near 49.

Night: Rain. Cloudy, with a low around 40.

Monday Dec 22

Day: Rain. Snow level 6900 feet. Mostly cloudy, with a high near 47.

Night: Rain likely. Snow level 6400 feet. Mostly cloudy, with a low around 35.

Tuesday Dec 23

Day: A chance of rain. Snow level 6100 feet. Mostly cloudy, with a high near 46.

Night: Rain likely. Snow level 6100 feet. Mostly cloudy, with a low around 34.

Wednesday Dec 24

Day: Rain likely. Snow level 5800 feet. Mostly cloudy, with a high near 42.

About Janesville, CA

Janesville (also known as Lassen) is a sparsely populated census-designated place in Lassen County, California. It is located 11 miles (18 km) southeast of Susanville, at an elevation of 4239 feet (1292 m). Janesville is located on the eastern slopes of the Sierra Nevada Mountain range. Its population is 2,461 as of the 2020 census, up from 1,408 from the 2010 census. The community consists of an elementary school, a park, four churches, two gas stations, a pizza parlor, a coffee shop, a veterinary hospital, a hardware store, a post office, a Dollar General and a few other businesses. Janesville stretches over a distance of 8 miles (13 km). Its ZIP Code is 96114. The community is inside area code 530.

Content from Wikipedia, licensed under CC BY-SA 3.0.

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Current conditions: We use the nearest available station to your location - including professional MESONET/MADIS and local weather stations - often miles closer than regional airports.

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