Climate averages 1991–2020
Dayton weather
in July.
A hot, moderately wet month: the warmest and the 8th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
July is a hot month in Dayton: daytime highs average 28.4°C and nights cool to about 19.5°C. By daytime temperature it is the warmest month of the year.
Expect about 86 mm of rain on roughly 12 days, which makes July a moderately wet month (the 8th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 14 h 41 min on an average July day.
The nearest other city in this atlas is Cincinnati (76 km away). In July its highs average 28.9°C, 0.5°C warmer than Dayton, with 88 mm of rain.
Among the 498 cities listed in the United States, Dayton ranks joint 340th of 498 for the warmest July highs and joint 281st of 498 for the driest July (rainfall, lowest first). The mean July high of those 498 cities is 30.3°C; Dayton is 1.9°C cooler than that mean.
From July to August, average highs fall by 0.5°C to 27.9°C, and monthly rainfall falls from 86 mm to 81 mm.
The annual picture
July in context
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
Dayton climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 2.3°C-5.5°C | -5.5°C | 82 | 9.8 | 9.710 h |
| February | 4.6°C-4.1°C | -4.1°C | 70 | 9.3 | 10.711 h |
| March | 10.0°C0.4°C | 0.4°C | 100 | 11.1 | 11.912 h |
| April | 16.8°C6.4°C | 6.4°C | 116 | 12.7 | 13.213 h |
| May | 22.0°C12.3°C | 12.3°C | 116 | 13.3 | 14.314 h |
| June | 26.5°C17.4°C | 17.4°C | 106 | 12.6 | 14.915 h |
| July, selected | 28.4°C19.5°C | 19.5°C | 86 | 11.6 | 14.715 h |
| August | 27.9°C18.9°C | 18.9°C | 81 | 10.0 | 13.714 h |
| September | 24.4°C15.3°C | 15.3°C | 68 | 7.8 | 12.512 h |
| October | 17.6°C9.0°C | 9.0°C | 74 | 8.4 | 11.211 h |
| November | 10.4°C2.8°C | 2.8°C | 82 | 8.9 | 10.010 h |
| December | 4.6°C-2.3°C | -2.3°C | 85 | 9.7 | 9.49 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
July in nearby cities
- Cincinnati in JulyUnited States · 76 kmHigh 28.9°C · Low 19.5°C · 88 mm rain
- Columbus in JulyUnited States · 104 kmHigh 28.3°C · Low 19.0°C · 88 mm rain
- Muncie in JulyUnited States · 113 kmHigh 27.7°C · Low 18.7°C · 86 mm rain
- Fishers in JulyUnited States · 157 kmHigh 28.2°C · Low 19.1°C · 87 mm rain
- Carmel in JulyUnited States · 166 kmHigh 28.1°C · Low 19.2°C · 87 mm rain
- Indianapolis in JulyUnited States · 168 kmHigh 28.5°C · Low 19.5°C · 90 mm rain
- Fort Wayne in JulyUnited States · 172 kmHigh 27.8°C · Low 18.4°C · 91 mm rain
- Meads in JulyUnited States · 197 kmHigh 29.6°C · Low 20.4°C · 109 mm rain
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 limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Dayton) is explained once on the Dayton year overview and on the Sources, method and limits page.