Climate and monthly weather forecast
Chillicothe, OH

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The climate of Chillicothe

Chillicothe, situated in the Ohio Valley, falls into the Koppen climate category Cfa; representing a humid subtropical climate with no dry season. This characteristic directly influences the year-round weather conditions and is reflected in the monthly averages.

Fluctuations in temperature throughout the year are substantial, with minimum values occurring in January at 22.8°F (-5.1°C), and maximum values peaking at 83.8°F (28.8°C) in July. With respect to rainfall, precipitation is distributed evenly across the year, with the highest levels occurring in May at 2.95" (75mm) and the lowest in September at 1.54" (39mm). Snowfall is a common occurrence during the colder part of the year with maximum amounts recorded in January and December of precipitation is typically accumulated. Throughout the year, there are 156.4 rainfall days, and 25.63" (651mm) of precipitation is accumulated. Months with snowfall are January through April, November and December. January is the month with the most snowfall. Snow falls for 9.6 days and accumulates 2.48" (63mm) of snow. In Chillicothe, the average length of the day in January is 9h and 46min.
On the first day of the month, sunrise is at 7:51 am and sunset at 5:19 pm. On the last day of January, sunrise is at 7:39 am and sunset at 5:50 pm EST. With an average of 3.8h of sunshine, January has the least sunshine of the year. In January, the average daily maximum UV index in Chillicothe is 2. A UV Index of 2, and less, symbolizes a low health risk from unprotected exposure to Sun's UV rays for the average person.
Note: An average UV index of 2 in January transforms into this advice:
Extended time in the sun generally does not harm most, but those with sensitive skin, infants, and children should always be protected. Avoiding the Sun during its peak radiation time around midday is a healthy practice. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck. Be careful! The Sun's UV radiation can nearly be doubled by the reflective quality of snow.

Weather in February

There is a slight rise in temperature as February progresses, contributing to an incrementally milder climate. The month mirrors January's high humidity, prolonged cloud cover, and intermittent snowfall. With 2.28" (58mm) of snow, winter lovers can anticipate some continuing fun. Weather in February »

Weather in March

March carries the baton from February with a marked improvement in weather conditions. With a shift towards more moderate temperatures, inhabitants of Chillicothe will begin to note the distinct transition from winter to spring. A notable change is the increasing daylight hours, gradually lengthening each day. Weather in March »

Weather in April

April ushers in a mellow climate, with temperatures ranging from 44.2°F (6.8°C) to 63.1°F (17.3°C). This marks a substantial leap from March's chill, heralding the embrace of more comfortable weather. Sunshine dominates an ample portion of the day, a pleasant change from the earlier months' gloom. Weather in April »

Weather in May

May signals the advent of warmer days, as the trend towards rising temperatures continues in Chillicothe. A significant increase in rainfall of 2.95" (75mm) hints towards the blooming season of flowers and the freshness that follows showers. Weather in May »

Weather in June

June continues the upward swing in temperature, bringing with it an air of summer sunshine. Balmy temperatures, higher daylight hours, and dropping cloud percentage form an inviting ensemble for outdoor activities. More sunshine graces Chillicothe and a dip in wind speed adds to the appeal. Weather in June »

Weather in July

July, seeped in the mid-summer essence, registers the highest temperatures of the year, oscillating from 64°F (17.8°C) to 83.8°F (28.8°C). It's peak season for sunbathing, with the UV Index tipping to 6. Extended daylight, lower wind speeds, and clear skies paint an ideal background for any summer activity. Weather in July »

Weather in August

August continues the celebration of summer in Chillicothe with temperatures relatively similar to July. The overall footing of the season remains constant, marked by a drop in humidity and increasing sunshine hours. The month observes a decrease in rainfall from 2.56" (65mm) to 1.93" (49mm), reinforcing the emphasis on sunny, outdoor exploits. Weather in August »

Weather in September

September introduces the first whiff of autumn, accompanied by a modest drop in temperature. Yet, the transition is subtle, keeping in line with the bright tenor of the previous months. Chillicothe witnesses an increase in wind speed, introducing a pleasantly crisp feel to the air. Weather in September »

Weather in October

October is indicative of autumn's full arrival in Chillicothe, as temperatures plunge significantly. The feel of the weather mirrors the emblematic fall attributes - a cooler breeze, fewer hours of daylight, and an enhanced fall foliage. Weather in October »

Weather in November

November pushes the temperature scale further down in Chillicothe, with a more substantial dip compared to October. The nip in the air finds accompaniment in dense cloud cover and frequent rainfall. Adding to the wintry prelude is the appearance of snowfall, with November recording 0.79" (20mm) of snow. Weather in November »

Weather in December

December welcomes winter full swing into Chillicothe. This sees colder temperatures, dwindling daylight, and an increase in snowfall to 1.57" (40mm). The reduction in hours of sunshine, paired with a rise in cloud percentage, underscores the wintry setting. Weather in December »
Updated: Aug 28, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the coldest month?

January is the month that records the lowest temperatures, with averages ranging from a high of 35.4°F (1.9°C) to a low of 22.8°F (-5.1°C).

What are the most humid months?

January and February, with an average relative humidity of 82%, are most humid months.

How many days does it rain?

Throughout the year, there are 156.4 rainfall days, and 25.63" (651mm) of precipitation is accumulated.

When does it snow?

January through April, November and December are months with snowfall.

When does it snow the most?

January is the month with the most snowfall. Snow falls for 9.6 days and accumulates 2.48" (63mm) of snow.

How many days does it snow?

Throughout the year, there are 31.6 snowfall days, and 8.94" (227mm) of snow is accumulated.

What is the month with the least sunshine?

The month with the least sunshine in Chillicothe is January, with an average of 3.8h of sunshine.

When is Daylight Saving Time (DST)?

On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from EST to EDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from EDT to EST.

What is the rainiest month in Chillicothe?

The month with the most rainfall is May, when the rain falls for 17.9 days and typically aggregates up to 2.95" (75mm) of precipitation.

When it does not snow?

May through October are months without snowfall.

When are the longest days?

With an average of 14h and 54min of daylight, June has the longest days of the year.

What are the months with the highest UV index?

The months with the highest UV index are June through August, with an average maximum UV index of 6.

What are the warmest months?

July, with average temperatures reaching a high of 83.8°F (28.8°C) and a low of 64°F (17.8°C), is the warmest month.

What month has the most sunshine?

With an average of 10.6h of sunshine, August has the most sunshine of the year.

What is the driest month?

September is the month with the least rainfall. Rain falls for 12.4 days and accumulates 1.54" (39mm) of precipitation.

What is the least humid month?

With an average relative humidity of 75%, November is the least humid month.

What is the month with the shortest days?

The month with the shortest days is December, with an average of 9h and 30min of daylight.

What is the month with the lowest UV index?

December is the month with the lowest UV index, with an average maximum UV index of 1.

Average temperature
Chillicothe, OH

Average temperature - Chillicothe, OH

The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is January (35.4°F).

The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (22.8°F).

Average pressure
Chillicothe, OH

Average pressure - Chillicothe, OH

The month with the highest atmospheric pressure is November (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).

Average wind speed
Chillicothe, OH

Average wind speed - Chillicothe, OH

The windiest months (with the highest average wind speed) are January and February (8.3mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).

Average humidity
Chillicothe, OH

Average humidity - Chillicothe, OH

The months with the highest relative humidity are January and February (82%).
The month with the lowest relative humidity is November (75%).

Average rainfall
Chillicothe, OH

Average rainfall - Chillicothe, OH

The wettest month (with the highest rainfall) is May (2.95").
The driest month (with the least rainfall) is September (1.54").

Average rainfall days
Chillicothe, OH

Average rainfall days - Chillicothe, OH

The month with the highest number of rainy days is May (17.9 days).
The month with the least rainy days is November (8.4 days).

Average snowfall
Chillicothe, OH

Average snowfall - Chillicothe, OH

The month with the highest snowfall is January (2.48").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days
Chillicothe, OH

Average snowfall days - Chillicothe, OH

The month with the highest number of snowfall days is January (9.6 days).
The months with the least snowfall days are June, July, August, September and October (0 days).

Average daylight / Average sunshine
Chillicothe, OH

Average daylight / Average sunshine - Chillicothe, OH

The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).

The month with the most sunshine is August (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).

Average sunshine days
Chillicothe, OH

Average sunshine days - Chillicothe, OH

The month with the most sunshine days is November (19.9 days).
The month with the least sunshine days is May (9.8 days).

Average visibility
Chillicothe, OH

Average visibility - Chillicothe, OH

The months with the highest visibility are February, March, April, June, August, October, November and December (6mi).
The months with the lowest visibility are January, May, July and September (5mi).

Chillicothe, Ohio, USA

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