Climate averages 1991–2020
Cincinnati weather
by month.
See how the year changes. July has the highest average daily maximum; September has the lowest average monthly rainfall.
Pleasant-weather months by our simple rule: September
Long-term climate patterns, not a forecast for a particular trip.
Across the year Cincinnati averages a daytime high of 17.1°C and a nighttime low of 7.7°C, with about 1,087 mm of rain on roughly 124 days. July is the warmest month (average high 28.9°C) and January the coolest (3.5°C). April is the wettest month with 118 mm; September is the driest with 68 mm.
Months with pleasant weather by a simple rule (average high between 18°C and 29°C, average low of at least 5°C and at most 8 rain days): September. This looks at temperature and rain only, not humidity, wind, sea temperature or crowds.
The annual picture
A year in Cincinnati
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Cincinnati climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 3.5°C-4.8°C | -4.8°C | 83 | 10.1 | 9.810 h |
| February | 5.9°C-3.5°C | -3.5°C | 75 | 9.1 | 10.711 h |
| March | 11.2°C1.0°C | 1.0°C | 105 | 10.9 | 11.912 h |
| April | 17.7°C6.8°C | 6.8°C | 118 | 12.2 | 13.213 h |
| May | 22.4°C12.5°C | 12.5°C | 117 | 13.0 | 14.314 h |
| June | 27.0°C17.3°C | 17.3°C | 106 | 12.1 | 14.915 h |
| July | 28.9°C19.5°C | 19.5°C | 88 | 11.3 | 14.615 h |
| August | 28.5°C18.9°C | 18.9°C | 75 | 9.8 | 13.714 h |
| September | 25.0°C15.2°C | 15.2°C | 68 | 7.9 | 12.512 h |
| October | 18.4°C8.9°C | 8.9°C | 75 | 8.2 | 11.211 h |
| November | 11.3°C2.8°C | 2.8°C | 84 | 8.9 | 10.110 h |
| December | 5.6°C-1.9°C | -1.9°C | 92 | 10.2 | 9.59 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
Nearby cities
- DaytonUnited States · 76 kmHigh 16.3°C · Low 7.5°C · 1,066 mm rain a year
- LexingtonUnited States · 127 kmHigh 18.1°C · Low 8.8°C · 1,210 mm rain a year
- MuncieUnited States · 140 kmHigh 15.6°C · Low 6.5°C · 1,032 mm rain a year
- LouisvilleUnited States · 145 kmHigh 18.6°C · Low 9.2°C · 1,169 mm rain a year
- IndianapolisUnited States · 158 kmHigh 16.3°C · Low 7.4°C · 1,075 mm rain a year
- FishersUnited States · 158 kmHigh 16.0°C · Low 6.9°C · 1,054 mm rain a year
- ColumbusUnited States · 160 kmHigh 16.2°C · Low 6.9°C · 1,057 mm rain a year
- CarmelUnited States · 167 kmHigh 15.9°C · Low 7.0°C · 1,054 mm rain a year
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsWhat do the high and low temperatures mean?
We average the daily maximum and daily minimum for each calendar month over 1991–2020. They are not record extremes, a forecast range or temperatures at a fixed time of day.
How is a rain day counted?
A local calendar day (standard time, UTC-5, no daylight saving) with at least 1 mm of total precipitation counts as one rain day. We count these for each year and month, then average across 30 years. The average does not predict which days will be wet.
Where do the numbers come from?
ERA5-Land (temperature) and ERA5 (precipitation) reanalysis from the Copernicus Climate Change Service, read from the Open-Meteo open-data archive. Temperature comes from the 0.1° model cell at 39.10°, -84.50° (3 km from the city centre), adjusted down by 0.3°C for the difference between the city's elevation (267 m) and the cell's (218 m). Rain comes from the 0.25° cell at 39.25°, -84.50°. These are model estimates, not weather-station readings; coast, hills and city streets can differ.
Does this page show sunshine, humidity or sea temperature?
No. The data used here contain air temperature and precipitation only. Daylight hours are calculated from the city's latitude (sunrise to sunset), not measured sunshine.