Anna, Illinois Weather by Month

Anna, Illinois, is a charming small city located in Union County in the southern part of the state. Situated within the scenic Shawnee National Forest region, Anna is approximately 120 miles southeast of St. Louis, Missouri, and about 350 miles south of Chicago. The city’s geographical coordinates are 37.4603° N latitude and 89.2476° W longitude, placing it in a region characterized by rolling hills, lush forests, and rich agricultural lands.

Anna is part of the United States and exemplifies the quintessential small-town charm of rural Illinois. The population of Anna is around 4,400 residents, reflecting its close-knit community atmosphere. The area covered by Anna is roughly 3.5 square miles, featuring a mix of residential neighborhoods, commercial establishments, and natural landscapes.

One of the notable companies in Anna is Union County Hospital, which provides essential healthcare services to the region and is a significant employer in the area. While Anna does not host a major university, it is in close proximity to Southern Illinois University in Carbondale, which offers a wide range of educational opportunities and cultural events for residents.

Major landmarks in and around Anna include the Lincoln Memorial Picnic Grounds, which offers beautiful views and recreational opportunities, and the Shawnee Hills Wine Trail, a popular destination for wine enthusiasts. Additionally, the nearby Trail of Tears State Forest and Giant City State Park provide stunning natural scenery and a variety of outdoor activities, making Anna a gateway to some of southern Illinois’ most beautiful landscapes.

Climate and Weather Overview

Anna, Illinois, experiences a humid subtropical climate, characterized by hot, humid summers and mild to cool winters. The town receives moderate to high annual precipitation, with significant rainfall during the spring and summer months. The varied climate supports a diverse range of outdoor activities throughout the year.

Average Monthly Temperature, Precipitation, and Sunny Days

Month Avg Temperature (°F) Avg Precipitation (inches) Avg Sunny Days
January 33.0 3.3 13
February 37.0 3.2 12
March 47.0 4.4 15
April 57.0 4.5 17
May 66.0 5.1 18
June 75.0 4.0 20
July 79.0 4.2 22
August 78.0 3.6 21
September 71.0 3.5 19
October 60.0 3.3 17
November 48.0 4.1 14
December 37.0 3.9 12

Detailed Weather by Month

January

January in Anna is cold, with average temperatures around 33.0°F. The town typically receives about 3.3 inches of precipitation, mostly as rain and occasional snow. Sunny days are relatively few, averaging around 13 for the month.

Activities: Winter activities such as hiking in the nearby Shawnee National Forest and exploring the Lincoln Memorial Picnic Grounds are popular during this time. The snowy landscape provides beautiful scenery for outdoor photography and winter hikes. While major natural disasters are rare, heavy snowfalls and occasional ice storms can occur, requiring preparedness for extreme weather conditions.

February

February remains cold with average temperatures slightly higher at 37.0°F. Precipitation is similar to January, averaging about 3.2 inches, primarily as rain and snow. The town enjoys approximately 12 sunny days in February.

Activities: This month is ideal for continuing winter sports and activities. The serene snow-covered landscape is perfect for snowshoeing and winter wildlife watching. Valentine’s Day events and cozy indoor gatherings are popular during this colder period.

March

March marks the beginning of the transition to spring, with average temperatures rising to 47.0°F. Precipitation increases to 4.4 inches, with a mix of rain and snow. The number of sunny days increases to 15.

Activities: As the weather starts to warm, early spring hikes and bird watching become more enjoyable. The melting snow and longer days encourage outdoor activities, although trails can be muddy, so proper footwear is recommended.

April

April brings milder temperatures, with averages around 57.0°F. Precipitation averages 4.5 inches, with more rain than snow. Sunny days become more frequent, averaging 17.

Activities: The arrival of spring blossoms makes April a perfect time for exploring the local parks and trails. Fishing season begins as rivers and lakes thaw, and it’s also an excellent time for visiting historical sites and museums. The warmer weather and blooming flowers create ideal conditions for photography and nature walks.

May

May sees a significant rise in temperatures, averaging 66.0°F. Precipitation remains moderate at 5.1 inches. The number of sunny days increases to 18.

Activities: The warming weather encourages outdoor activities such as hiking, biking, and fishing. Local farmers’ markets begin to open, offering fresh produce and handmade goods. May is also a great time for bird watching and exploring the diverse flora and fauna of the nearby state parks and forests.

June

June marks the beginning of summer with average temperatures around 75.0°F. Precipitation is relatively high at 4.0 inches. Sunny days are plentiful, averaging 20.

Activities: This is an excellent time for camping, boating, and participating in local festivals. The warm, sunny weather is perfect for exploring the Shawnee National Forest and enjoying outdoor concerts and events. The numerous trails provide ample opportunities for adventure and exploration.

July

July is the warmest month in Anna, with average temperatures peaking at 79.0°F. Precipitation is consistent at 4.2 inches. Sunny days are most frequent, averaging 22.

Activities: Summer activities such as swimming, boating, and picnicking are popular. The Fourth of July celebrations in nearby towns include fireworks, parades, and community events. July is also a perfect time for outdoor adventures in the surrounding natural areas, with necessary precautions for sun protection.

August

August remains warm with average temperatures around 78.0°F. Precipitation decreases slightly to 3.6 inches. Sunny days are abundant, averaging 21.

Activities: The warm weather is ideal for continued summer activities. Local agricultural fairs and markets offer fresh produce and crafts. Hiking, biking, and camping are popular, and the nearby lakes provide excellent conditions for water sports and fishing.

September

September sees a gradual cooling with average temperatures dropping to 71.0°F. Precipitation remains moderate at 3.5 inches. Sunny days average 19.

Activities: This is a great month for outdoor sports and exploring historical sites. The cooler temperatures make hiking and biking more comfortable. The changing foliage adds a splash of color to the landscape. September is also a good time for attending local harvest festivals and enjoying the fall scenery.

October

October brings further cooling with average temperatures around 60.0°F. Precipitation remains moderate at 3.3 inches. Sunny days are frequent, averaging 17.

Activities: Fall festivals and harvest events are popular in October. The mild weather is perfect for visiting pumpkin patches, corn mazes, and enjoying the fall scenery. The nearby parks and forests are particularly beautiful during this month with their vibrant autumn colors.

November

November marks the transition to winter with average temperatures dropping to 48.0°F. Precipitation remains steady at 4.1 inches. Sunny days average 14.

Activities: Indoor activities such as visiting museums and attending community events become more popular. The cooler weather signals the start of the holiday season, with local events and celebrations. November is also a good time for early holiday shopping in Anna’s charming shops and markets.

December

December is a cold month in Anna, with average temperatures around 37.0°F. Precipitation averages 3.9 inches, with a mix of rain and snow. Sunny days are still relatively few, averaging 12.

Activities: Holiday festivities and winter sports like ice skating and snowshoeing are common. The colder weather and festive atmosphere make December a special time in Anna, with holiday markets and events adding to the charm. Exploring the rural landscape during the mild winter days can be particularly rewarding.

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