Amboy, Illinois Weather by Month

Introduction to Amboy, Illinois

Amboy is a small city located in Lee County, in the northern part of the U.S. state of Illinois. Situated amidst picturesque farmlands and rolling hills, Amboy offers a blend of rural charm and historical significance. The city is approximately 100 miles west of Chicago, providing a tranquil atmosphere while still being within a reasonable distance of a major urban center.

Geographically, Amboy lies at approximately 41.71°N latitude and 89.33°W longitude, covering an area of about 6.3 square miles. The city has a population of around 2,500 residents, contributing to its close-knit community feel and small-town charm.

Amboy is home to several notable landmarks and institutions. One of the most significant is the Amboy Depot Museum, which showcases the city’s rich railroad history and heritage. Another important landmark is the Green River Ordnance Plant, a historic site from World War II. The city also boasts the Shady Oaks Golf Course, a popular recreational facility for both residents and visitors. While Amboy does not host major universities, it is in close proximity to educational institutions in nearby cities.

Climate and Weather Overview

Amboy, Illinois, experiences a humid continental climate characterized by cold, snowy winters and warm, humid summers. The climate is influenced by its location in the Midwest, resulting in significant seasonal variations and a generally humid climate with occasional extremes in temperature.

Average Monthly Climate Data

Month Average Temperature (°F) Average Precipitation (inches) Average Sunny Days
January 22.0 1.5 11
February 25.0 1.4 11
March 35.0 2.2 12
April 47.0 3.5 13
May 58.0 4.1 15
June 68.0 4.2 15
July 72.0 4.0 16
August 71.0 3.7 15
September 63.0 3.1 13
October 52.0 2.6 13
November 38.0 2.5 11
December 26.0 1.9 10

Weather by Month in Amboy, Illinois


January in Amboy is typically the coldest month of the year. Average temperatures range from a low of around 10°F to a high of about 34°F. Precipitation is relatively low, averaging around 1.5 inches, mostly in the form of snow. The city typically enjoys about 11 sunny days during this month.

Natural disasters such as severe winter storms and blizzards can occur, but they are relatively rare. Recommended activities include indoor pursuits such as visiting the Amboy Depot Museum, enjoying the cozy atmosphere of local cafes, or participating in winter sports like ice skating and sledding at local parks.


February sees a slight warming trend with average temperatures ranging from 14°F to 38°F. Precipitation remains low at around 1.4 inches, with occasional snowfall. The number of sunny days remains the same as January, at around 11 days.

Outdoor activities such as skiing, snowshoeing, and ice fishing continue to be popular. Exploring the local trails or enjoying winter festivals are also great options.


March marks the beginning of spring with average temperatures climbing to between 24°F and 46°F. Precipitation averages around 2.2 inches, with a mix of rain and snow. Amboy typically experiences around 12 sunny days during this month.

The emergence of blooming flowers makes it a beautiful time for outdoor activities. Hiking, garden tours, and visiting nature reserves are recommended. Natural disasters such as flooding due to melting snow can occur, so it’s important to stay informed about weather conditions.


April sees a more noticeable shift to warmer weather with temperatures ranging from 34°F to 60°F. Precipitation averages around 3.5 inches, and the number of sunny days increases to around 13.

This month is ideal for outdoor activities like picnicking, biking, and visiting local farmers’ markets. The risk of severe weather, including thunderstorms, begins to rise, making it important to stay prepared.


May brings even warmer temperatures, ranging from 45°F to 71°F. Precipitation remains moderate at 4.1 inches. The abundance of sunshine, with about 15 sunny days, makes it perfect for outdoor adventures.

Residents and visitors can enjoy activities like gardening, hiking, and attending local festivals. May is also known for its beautiful spring blooms, making it an ideal time for nature walks and photography.


June heralds the start of summer with average temperatures ranging from 55°F to 81°F. Precipitation averages around 4.2 inches, often in the form of brief but intense thunderstorms. Amboy typically experiences around 15 sunny days in June.

Outdoor activities such as swimming, boating, and picnics are popular. The weather is generally favorable with a high number of sunny days, making it an excellent time for outdoor exploration.


July is typically the warmest month in Amboy, with temperatures ranging from 60°F to 85°F. Precipitation is around 4.0 inches, making it a relatively wet month. Amboy enjoys about 16 sunny days during this month.

Despite the heat, outdoor activities like attending local fairs, swimming, and exploring state parks are common. Residents should stay hydrated and take precautions against heat-related illnesses.


August continues the summer warmth with temperatures ranging from 58°F to 84°F. Precipitation remains moderate at 3.7 inches, and the number of sunny days is around 15.

The weather remains suitable for outdoor activities, including water sports and hiking. It’s important to monitor weather reports for any severe thunderstorms that may occur.


September brings a gradual cooling with temperatures ranging from 50°F to 76°F. Precipitation averages around 3.1 inches, and the number of sunny days starts to decrease to about 13.

This month is ideal for outdoor activities such as apple picking, hiking, and attending fall festivals. The risk of severe weather is low, making it a pleasant time to enjoy the outdoors.


October sees more significant cooling with temperatures ranging from 40°F to 64°F. Precipitation averages around 2.6 inches, and sunny days are around 13.

Fall foliage makes this month particularly scenic, ideal for outdoor photography, hiking, and visiting pumpkin patches. Natural disasters are rare in October, but it can be a wet month.


November temperatures range from 30°F to 51°F, with precipitation averaging 2.5 inches. The weather becomes cooler, and the number of sunny days decreases to about 11.

Outdoor activities like hiking and visiting local markets are still enjoyable. As the holiday season approaches, indoor activities and local events become more popular.


December brings cooler temperatures, ranging from 18°F to 39°F, and precipitation averages around 1.9 inches. Snow is more common, adding a festive atmosphere to the town. Amboy experiences around 10 sunny days during this month.

Indoor activities such as visiting museums and historical sites are recommended. The festive season also brings various local events and holiday markets to enjoy.

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