Climate and Average Weather Year Round in Cincinnati Ohio, United States

In Cincinnati, the summers are warm and humid, the winters are very cold and snowy, and it is partly cloudy year round. Over the course of the year, the temperature typically varies from 24°F to 86°F and is rarely below 8°F or above 93°F.

Based on the tourism score, the best time of year to visit Cincinnati for warm-weather activities is from mid June to late September.

The hot season lasts for 3.8 months, from May 24 to September 19, with an average daily high temperature above 77°F. The hottest month of the year in Cincinnati is July, with an average high of 86°F and low of 67°F.

The cold season lasts for 3.0 months, from November 30 to February 29, with an average daily high temperature below 49°F. The coldest month of the year in Cincinnati is January, with an average low of 25°F and high of 40°F.

In Cincinnati, the average percentage of the sky covered by clouds experiences significant seasonal variation over the course of the year.

The clearer part of the year in Cincinnati begins around June 12 and lasts for 4.8 months, ending around November 5.

The clearest month of the year in Cincinnati is August, during which on average the sky is clear, mostly clear, or partly cloudy 67% of the time.

The cloudier part of the year begins around November 5 and lasts for 7.2 months, ending around June 12.

The cloudiest month of the year in Cincinnati is January, during which on average the sky is overcast or mostly cloudy 60% of the time.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in Cincinnati varies throughout the year.

The wetter season lasts 5.1 months, from March 16 to August 18, with a greater than 31% chance of a given day being a wet day. The month with the most wet days in Cincinnati is May, with an average of 12.1 days with at least 0.04 inches of precipitation.

The drier season lasts 6.9 months, from August 18 to March 16. The month with the fewest wet days in Cincinnati is January, with an average of 7.1 days with at least 0.04 inches of precipitation.

Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two. The month with the most days of rain alone in Cincinnati is May, with an average of 12.1 days. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 40% on May 18.

Rainfall

To show variation within the months and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day of the year. Cincinnati experiences significant seasonal variation in monthly rainfall.

Rain falls throughout the year in Cincinnati. The month with the most rain in Cincinnati is May, with an average rainfall of 4.1 inches.

The month with the least rain in Cincinnati is January, with an average rainfall of 2.0 inches.

Snowfall

As with rainfall, we consider the snowfall accumulated over a sliding 31-day period centered around each day of the year. Cincinnati experiences some seasonal variation in monthly snowfall.

The snowy period of the year lasts for 3.6 months, from November 30 to March 18, with a sliding 31-day snowfall of at least 1.0 inches. The month with the most snow in Cincinnati is February, with an average snowfall of 3.2 inches.

The snowless period of the year lasts for 8.4 months, from March 18 to November 30. The least snow falls around July 21, with an average total accumulation of 0.0 inches.

The length of the day in Cincinnati varies significantly over the course of the year. In 2024, the shortest day is December 21, with 9 hours, 25 minutes of daylight; the longest day is June 20, with 14 hours, 56 minutes of daylight.

The earliest sunrise is at 6:11 AM on June 13, and the latest sunrise is 1 hour, 56 minutes later at 8:07 AM on November 2. The earliest sunset is at 5:14 PM on December 6, and the latest sunset is 3 hours, 53 minutes later at 9:08 PM on June 27.

Daylight saving time (DST) is observed in Cincinnati during 2024, starting in the spring on March 10, lasting 7.8 months, and ending in the fall on November 3.

The figure below presents a compact representation of key lunar data for 2024. The horizontal axis is the day, the vertical axis is the hour of the day, and the colored areas indicate when the moon is above the horizon. The vertical gray bars (new Moons) and blue bars (full Moons) indicate key Moon phases.

We base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid. Unlike temperature, which typically varies significantly between night and day, dew point tends to change more slowly, so while the temperature may drop at night, a muggy day is typically followed by a muggy night.

Cincinnati experiences extreme seasonal variation in the perceived humidity.

The muggier period of the year lasts for 4.0 months, from May 23 to September 22, during which time the comfort level is muggy, oppressive, or miserable at least 15% of the time. The month with the most muggy days in Cincinnati is July, with 18.2 days that are muggy or worse.

The least muggy day of the year is February 10, when muggy conditions are essentially unheard of.

This section discusses the wide-area hourly average wind vector (speed and direction) at 10 meters above the ground. The wind experienced at any given location is highly dependent on local topography and other factors, and instantaneous wind speed and direction vary more widely than hourly averages.

The average hourly wind speed in Cincinnati experiences significant seasonal variation over the course of the year.

The windier part of the year lasts for 6.6 months, from October 23 to May 11, with average wind speeds of more than 6.3 miles per hour. The windiest month of the year in Cincinnati is March, with an average hourly wind speed of 8.0 miles per hour.

The calmer time of year lasts for 5.4 months, from May 11 to October 23. The calmest month of the year in Cincinnati is August, with an average hourly wind speed of 4.7 miles per hour.

The predominant average hourly wind direction in Cincinnati varies throughout the year.

The wind is most often from the south for 2.6 months, from April 3 to June 22 and for 3.2 months, from August 29 to December 5, with a peak percentage of 39% on November 13. The wind is most often from the west for 1.8 months, from June 22 to August 17 and for 3.9 months, from December 5 to April 3, with a peak percentage of 37% on July 12. The wind is most often from the east for 1.7 weeks, from August 17 to August 29, with a peak percentage of 27% on August 26.

To characterize how pleasant the weather is in Cincinnati throughout the year, we compute two travel scores.

The tourism score favors clear, rainless days with perceived temperatures between 65°F and 80°F. Based on this score, the best time of year to visit Cincinnati for general outdoor tourist activities is from mid June to late September, with a peak score in the last week of August.

The beach/pool score favors clear, rainless days with perceived temperatures between 75°F and 90°F. Based on this score, the best time of year to visit Cincinnati for hot-weather activities is from late June to late August, with a peak score in the last week of July.

Methodology

For each hour between 8:00 AM and 9:00 PM of each day in the analysis period (1980 to 2016), independent scores are computed for perceived temperature, cloud cover, and total precipitation. Those scores are combined into a single hourly composite score, which is then aggregated into days, averaged over all the years in the analysis period, and smoothed.

Our cloud cover score is 10 for fully clear skies, falling linearly to 9 for mostly clear skies, and to 1 for fully overcast skies.

Our precipitation score, which is based on the three-hour precipitation centered on the hour in question, is 10 for no precipitation, falling linearly to 9 for trace precipitation, and to 0 for 0.04 inches of precipitation or more.

Our tourism temperature score is 0 for perceived temperatures below 50°F, rising linearly to 9 for 65°F, to 10 for 75°F, falling linearly to 9 for 80°F, and to 1 for 90°F or hotter.

Our beach/pool temperature score is 0 for perceived temperatures below 65°F, rising linearly to 9 for 75°F, to 10 for 82°F, falling linearly to 9 for 90°F, and to 1 for 100°F or hotter.

Definitions of the growing season vary throughout the world, but for the purposes of this report, we define it as the longest continuous period of non-freezing temperatures (≥ 32°F) in the year (the calendar year in the Northern Hemisphere, or from July 1 until June 30 in the Southern Hemisphere).

The growing season in Cincinnati typically lasts for 6.4 months (196 days), from around April 11 to around October 24, rarely starting before March 25 or after April 28, and rarely ending before October 5 or after November 13.

Growing degree days are a measure of yearly heat accumulation used to predict plant and animal development, and defined as the integral of warmth above a base temperature, discarding any excess above a maximum temperature. In this report, we use a base of 50°F and a cap of 86°F.

Based on growing degree days alone, the first spring blooms in Cincinnati should appear around March 22, only rarely appearing before March 7 or after April 6.

This section discusses the total daily incident shortwave solar energy reaching the surface of the ground over a wide area, taking full account of seasonal variations in the length of the day, the elevation of the Sun above the horizon, and absorption by clouds and other atmospheric constituents. Shortwave radiation includes visible light and ultraviolet radiation.

The average daily incident shortwave solar energy experiences significant seasonal variation over the course of the year.

The brighter period of the year lasts for 4.1 months, from April 27 to August 30, with an average daily incident shortwave energy per square meter above 5.8 kWh. The brightest month of the year in Cincinnati is July, with an average of 6.6 kWh.

The darker period of the year lasts for 3.1 months, from November 6 to February 10, with an average daily incident shortwave energy per square meter below 2.8 kWh. The darkest month of the year in Cincinnati is December, with an average of 1.9 kWh.

For the purposes of this report, the geographical coordinates of Cincinnati are 39.162 deg latitude, -84.457 deg longitude, and 627 ft elevation.

The topography within 2 miles of Cincinnati contains only modest variations in elevation, with a maximum elevation change of 282 feet and an average elevation above sea level of 637 feet. Within 10 miles contains only modest variations in elevation (531 feet). Within 50 miles contains significant variations in elevation (820 feet).

The area within 2 miles of Cincinnati is covered by artificial surfaces (100%), within 10 miles by artificial surfaces (77%) and trees (20%), and within 50 miles by cropland (51%) and trees (35%).