The best times to visit Chillicothe for ideal weather are

April 30th to October 21st

based on average temperature and humidity from NOAA (the National Oceanic and Atmospheric Administration). Read below for more weather and travel details.



Other Chillicothe Travel Info

Weather in Chillicothe


Average temperatures in Chillicothe vary drastically. Considering humidity, temperatures feel cold for about half of the year and otherwise nice with a low chance of precipitation most of the year. The area is somewhat temperate — in the 43rd percentile for pleasant weather — compared to tourist destinations worldwide. Weeks with ideal weather are listed above. If you’re looking for the very warmest time to visit Chillicothe, the hottest months are July, August, and then June. See average monthly temperatures below. The warmest time of year is generally mid July where highs are regularly around 85.5°F (29.7°C) with temperatures rarely dropping below 66.4°F (19.1°C) at night.

Chillicothe Temperatures (Fahrenheit)


Chillicothe Temperatures (Celsius)


“Feels-Like” Temperatures

The way we experience weather isn’t all about temperature. Higher temperatures affect us much more at higher humidity, and colder temperatures feel piercing with high winds. Our perceived temperatures factor in humidity and wind chill to better represent how hot or cold the day feels to a person.

Chillicothe Perceived Temperature (F)


Chillicothe Perceived Temperature (C)



Average Chillicothe Temperatures by Month

Daily highs (averaged for the month) usually give the best indication of the weather. A significantly lower mean and low generally just means it gets colder at night.

Show Fahrenheit

Month Avg. High (°F) Avg. Mean (°F) Avg. Low (°F)
Jan 32.4 23.5 16
Feb 33.4 24.7 17.3
Mar 51.3 40.1 31.9
Apr 63.3 51.5 41.6
May 74.9 63.1 53
Jun 82.1 71.6 62.4
Jul 84.5 74.1 64.8
Aug 84.1 73.1 63.7
Sep 78.3 66.2 56.4
Oct 65.7 54.3 44.9
Nov 51.7 41.9 33.8
Dec 37.9 30.5 23.9

Show Celsius

Month Avg. High (°C) Avg. Mean (°C) Avg. Low (°C)
Jan 0.2 -4.7 -8.9
Feb 0.8 -4.1 -8.2
Mar 10.7 4.5 -0.1
Apr 17.4 10.8 5.3
May 23.8 17.3 11.7
Jun 27.8 22 16.9
Jul 29.2 23.4 18.2
Aug 28.9 22.8 17.6
Sep 25.7 19 13.6
Oct 18.7 12.4 7.2
Nov 10.9 5.5 1
Dec 3.3 -0.8 -4.5



Precipitation (Rain or Snow)

If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Chillicothe are January, September, and then March. Note that we define “significant precipitation” as .1 inches or more in this section. The lowest chance of rain or snow occurs around mid January. For example, on the week of January 15th there are no days of precipitation on average. By contrast, it’s most likely to rain or snow in early to mid May with an average of 2 days of significant precipitation the week of May 7th.

When can you find snow in Chillicothe? Weather stations report no annual snow. Please note that a value of 0 for snow in the graph below may either mean there was no snow, or that snow is unreported.

Chance of Precipitation

The graph below shows the % chance of rainy and snowy days in Chillicothe.

Days with precipitation

Snow on the Ground

The graph below shows the average snow on the ground in Chillicothe (in).

Snow depth

Average Rain and Snow by Month

Show Inches

Month Daily Chance of Rain Average Snow Depth (in) Total Precipitation (in)
Jan 5% 0 1
Feb 12% 0 1.1
Mar 11% 0 1.5
Apr 16% 0 2.1
May 20% 0 2.8
Jun 18% 0 3.1
Jul 11% 0 1.4
Aug 12% 0 2
Sep 11% 0 1.9
Oct 14% 0 1.9
Nov 14% 0 1.6
Dec 14% 0 1.8

Show Centimeters

Month Daily Chance of Rain Average Snow Depth (cm) Total Precipitation (cm)
Jan 5 0 2.5
Feb 12 0 2.8
Mar 11 0 3.8
Apr 16 0 5.3
May 20 0 7.1
Jun 18 0 7.9
Jul 11 0 3.6
Aug 12 0 5.1
Sep 11 0 4.8
Oct 14 0 4.8
Nov 14 0 4.1
Dec 14 0 4.6


Humidity and Wind

Chillicothe has some very humid months, with other comfortably humid months. The least humid month is April (53.8% relative humidity), and the most humid month is December (71.3%).

Wind in Chillicothe is usually calm. The windiest month is April, followed by January and March. April’s average wind speed of around 7.5 knots (8.7 MPH or 14 KPH) is considered “a gentle breeze.” Maximum sustained winds (the highest speed for the day lasting more than a few moments) are at their highest in early April where average top sustained speeds reach 15.6 knots, which is considered a moderate breeze.

Relative Humidity (%)

The graph below shows the average % humidity by month in Chillicothe.

Avg. Relative Humidity


The graph below shows wind speed (max and average) in knots.

Max Sustained Wind
Average Daily Wind

Average Wind Speeds

Show Wind Speeds

All wind speeds are in knots. 1 knot = 1.15 MPH or 1.85 KPH.

Month Avg. Wind Avg. Wind Feel Sustained High Wind High Wind Feel
Jan 6.6 Light breeze 13.5 Significant breeze
Feb 6.6 Light breeze 13.4 Significant breeze
Mar 6.6 Light breeze 13.5 Significant breeze
Apr 7.5 Gentle breeze 15.2 Significant breeze
May 5.9 Light breeze 13.1 Significant breeze
Jun 4.8 Light breeze 12 Significant breeze
Jul 3.6 Barely noticeable 9.8 Significant breeze
Aug 3.3 Barely noticeable 9.6 Gentle breeze
Sep 4 Light breeze 10.3 Significant breeze
Oct 5.2 Light breeze 12 Significant breeze
Nov 6.4 Light breeze 13.2 Significant breeze
Dec 6 Light breeze 12.5 Significant breeze

Show Relative Humidity by Month

Month Avg. Relative Humidity
Jan 66.5%
Feb 65.3%
Mar 60.5%
Apr 53.8%
May 56.5%
Jun 63.6%
Jul 65.3%
Aug 66.1%
Sep 62.8%
Oct 58.9%
Nov 60.5%
Dec 71.3%


Is it Safe to Travel to Chillicothe?

Our best data indicates this area is generally safe. As of Dec 04, 2023 there are no travel advisories or warnings for the United States; exercise normal security precautions. Check this page for any recent changes or regions to avoid: Travel Advice and Advisories. This advisory was last updated on Dec 04, 2023.


The Busiest and Least Crowded Months

The busiest month for tourism in Chillicothe, IL, US is July, followed by June and August. Prices for hotels and flights will be most expensive during these months, though you can save if you purchase well in advance. Tourists are unlikely to visit Chillicothe in November. Those willing to visit at these times will likely find it the least expensive month.

Estimated Tourism by Month


Most Popular Months to Visit

Tourists Seeking Accommodations

Tourism graph is based on Google searches for services used by tourists relative to the rest of the year. Tourism data for this area is extrapolated based on nearby areas. Displayed data is calculated relative to the peak, so a score of 38.7 in November means 38.7% of the tourists vs. July.



Overall Chillicothe Travel Experience by Season

Spring (March through May)

Humidity and temperatures combine to make this season feel moderately cold. Highs range from 79.2°F (26.2°C) and 37.2°F (2.9°C) with far warmer temperatures in the later months. Rain is somewhat common with 3 to 6 days of significant precipitation per month. Spring is the second busiest for tourism, which makes it a good time for those looking for things to do.

Summer (June through August)

The middle-year months have very comfortable weather with high temperatures that are comfortable. These months see moderate precipitation with 4 to 5 days of precipitation per month. June – August is the busiest season for tourism in Chillicothe, so lodging and other accommodations may cost more than usual.

Fall (September through November)

Fall daily highs range from 81.1°F (27.3°C) and 44°F (6.7°C), which will feel chilly given the humidity and wind. It rains or snows a normal amount: 3 to 4 days per month. Tourism is the slowest during these months due to the weather, so hotels may be affordably priced.

Winter (December through February)

Weather is far too cold this time of year in Chillicothe to be enjoyable for warm weather travelers. The average high during this season is between 38.6°F (3.7°C) and 31°F (-0.6°C). On average, it rains or snows a smalll amount: 2 to 4 times per month. These times of year are fairly slow with tourists.


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