Arnold, California Weather by Month

Arnold is a charming unincorporated community located in Calaveras County, California, United States. Nestled in the Sierra Nevada mountain range, Arnold is approximately 100 miles southeast of Sacramento, the state capital, and about 30 miles northeast of the county seat, San Andreas. This picturesque location places Arnold in the heart of California’s scenic Gold Country, surrounded by dense forests, rolling hills, and numerous recreational opportunities.

Geographically, Arnold is characterized by its mountainous terrain and lush pine forests, situated at an elevation of around 4,000 feet. The Stanislaus National Forest, which envelops the community, offers a plethora of outdoor activities, including hiking, camping, and fishing. The area is renowned for its natural beauty, with the towering Sierra Nevada peaks providing a stunning backdrop.

Arnold is part of the United States and falls under the jurisdiction of Calaveras County in the state of California. The community has a small population, estimated to be around 3,500 residents, fostering a close-knit and friendly atmosphere. Covering an area of approximately 14.6 square miles, Arnold is a compact community where residents enjoy a peaceful rural lifestyle while benefiting from the amenities of nearby towns.

One of the notable features of Arnold is its proximity to several significant landmarks and attractions. The Calaveras Big Trees State Park, located just a few miles away, is home to some of the largest and oldest living trees on earth—the giant sequoias. This park attracts visitors from all over the world who come to marvel at these natural wonders. Another notable landmark is the Arnold Rim Trail, which offers breathtaking views and a network of trails perfect for hiking and mountain biking.

Arnold does not host major universities or large corporations, but it is close to several educational and cultural landmarks. The nearby town of Angels Camp, known for its rich gold rush history, offers various cultural and historical attractions. Additionally, the community is within driving distance of the University of California, Merced, and California State University, Stanislaus, which provide educational opportunities and contribute to the region’s intellectual vibrancy.

The community is also known for its annual events and festivals, such as the Arnold Independence Day Parade and the Grape Stomp in nearby Murphys, which celebrate the local culture and heritage. These events bring residents and visitors together, fostering a strong sense of community and belonging.

Climate and Weather Overview

Arnold, California, experiences a Mediterranean climate, characterized by hot, dry summers and cool, wet winters. The town’s elevation and location in the Sierra Nevada influence its climate, resulting in significant temperature variations between seasons and a generally pleasant climate conducive to outdoor activities year-round.

Average Temperature, Precipitation, and Sunny Days

Below is a table that lists the average temperature, precipitation, and number of sunny days for each month in Arnold:

Month Average Temperature (°F) Precipitation (inches) Sunny Days
January 37 6.9 10
February 39 6.5 11
March 43 5.6 13
April 47 3.0 15
May 55 1.5 20
June 64 0.7 25
July 70 0.2 30
August 69 0.3 29
September 63 0.8 25
October 54 2.7 20
November 43 5.3 12
December 38 7.0 9

Monthly Weather Details


January in Arnold is characterized by cold winter weather, with average temperatures hovering around 37°F. Precipitation is high, averaging 6.9 inches, primarily in the form of rain and occasional snow. There are typically about 10 sunny days. Snowfall is common, and residents can expect several snowy days throughout the month. Natural disasters such as severe snowstorms and flooding can occur, occasionally disrupting daily activities.

Recommended Activities

  • Inside Activities: Visit local museums and enjoy cozy evenings by the fireplace in lodges.
  • Outside Activities: Engage in winter sports like skiing, snowboarding, and snowshoeing at nearby ski resorts.


February remains cold, with average temperatures rising slightly to 39°F. Precipitation averages 6.5 inches, and there are about 11 sunny days. Snowfall continues to be frequent, and the risk of severe snowstorms persists.

Recommended Activities

  • Inside Activities: Explore local art galleries and attend community events.
  • Outside Activities: Enjoy cross-country skiing and winter hiking on clear days.


March marks the beginning of spring with average temperatures increasing to 43°F. Precipitation remains substantial, averaging 5.6 inches, and there are about 13 sunny days. Snow begins to melt, and the town may experience occasional rain showers.

Recommended Activities

  • Inside Activities: Participate in indoor gardening workshops and local craft fairs.
  • Outside Activities: Take part in early spring hikes and birdwatching in the surrounding forests.


April brings milder weather, with average temperatures reaching 47°F. Precipitation decreases to 3.0 inches, and there are around 15 sunny days. The weather becomes more variable, with a mix of rain and occasional warm spells.

Recommended Activities

  • Inside Activities: Join community theater productions and art exhibits.
  • Outside Activities: Start gardening and enjoy outdoor picnics and nature walks.


May is characterized by pleasant spring weather with average temperatures of 55°F. Precipitation averages 1.5 inches, and the town enjoys about 20 sunny days. The risk of severe weather such as thunderstorms increases towards the end of the month.

Recommended Activities

  • Inside Activities: Visit local museums and historical sites.
  • Outside Activities: Engage in fishing, hiking, and community sports.


June ushers in summer with average temperatures rising to 64°F. Precipitation remains low at 0.7 inches, and there are around 25 sunny days. The weather is generally warm and dry, making it ideal for various outdoor activities.

Recommended Activities

  • Inside Activities: Explore local libraries and attend summer reading programs.
  • Outside Activities: Participate in barbecues, camping, and water activities in nearby lakes and rivers.


July is the warmest month, with average temperatures peaking at 70°F. Precipitation is minimal, averaging 0.2 inches, and there are about 30 sunny days. The weather is perfect for outdoor activities, though heat waves can occur.

Recommended Activities

  • Inside Activities: Enjoy community events and indoor concerts.
  • Outside Activities: Attend local fairs, go swimming, and enjoy outdoor festivals.


August remains warm, with average temperatures at 69°F and precipitation averaging 0.3 inches. The town typically experiences around 29 sunny days. Thunderstorms are possible, but the weather is generally stable and pleasant.

Recommended Activities

  • Inside Activities: Take cooking or art classes.
  • Outside Activities: Visit farmers’ markets, go hiking, and enjoy late summer picnics.


September sees temperatures cooling to an average of 63°F. Precipitation averages 0.8 inches, and there are about 25 sunny days. The transition to fall brings more stable weather and fewer thunderstorms.

Recommended Activities

  • Inside Activities: Attend local theater productions and indoor sports events.
  • Outside Activities: Participate in harvest festivals and scenic drives through the Sierra Nevada.


October is characterized by mild fall weather, with average temperatures around 54°F. Precipitation increases to 2.7 inches, and there are typically 20 sunny days. The risk of severe weather is low, making it a great month for outdoor activities.

Recommended Activities

  • Inside Activities: Enjoy indoor craft workshops and library events.
  • Outside Activities: Take part in fall hikes, pumpkin picking, and outdoor sports.


November brings cooler weather, with average temperatures of 43°F. Precipitation averages 5.3 inches, and there are about 12 sunny days. Early snowfall is possible, and the weather begins to turn wintery.

Recommended Activities

  • Inside Activities: Start holiday shopping and attend local community gatherings.
  • Outside Activities: Enjoy late fall walks and prepare for winter sports.


December marks the onset of winter, with average temperatures around 38°F. Precipitation is high, averaging 7.0 inches, and there are typically 9 sunny days. Snowfall is common, and the town may experience occasional snowstorms.

Recommended Activities

  • Inside Activities: Participate in holiday events and indoor concerts.
  • Outside Activities: Enjoy winter sports like sledding, ice skating, and snowboarding.

Arnold, California, offers a varied climate with distinct seasonal variations. Its Mediterranean climate provides residents and visitors with a range of activities suitable for each season, from winter sports and indoor events during the colder months to outdoor festivals and recreational activities in the warmer months. The town’s small population and scenic surroundings make it an inviting destination for those seeking a peaceful and community-oriented lifestyle.

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