Dayton weather in July: Dayton, Ohio: normal highs, lows, rain and records for July
Dayton in July has a normal high of 86°F and a normal low of 66°F, a daily mean of 76°F, holding near 86°F all month. Measurable precipitation falls on 11 days in a normal July, 3.95 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 30°C and low of 19°C, 100 mm of precipitation in July.
- NOAA stationDayton International Airport
- Station IDUSW00093815
- Location39.91°N 84.22°W
- Elevation1,000 ft (305 m)
- From the center8 miles
- Population136,346
- Jan 37° 22°
- Feb 41° 25°
- Mar 52° 33°
- Apr 65° 43°
- May 74° 54°
- Jun 83° 63°
- Jul 86° 66°
- Aug 85° 64°
- Sep 79° 57°
- Oct 66° 46°
- Nov 53° 35°
- Dec 42° 27°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Dayton in July?
The normal high is 86°F and the normal low 66°F, for a daily mean of 76.0°F. July is 3.3°F warmer than June and 1.5°F warmer than August. July is the warmest month of the year in Dayton and the 4th wettest. Across the month the normal high falls 1°F, from 86°F on July 1 to 85°F on July 31. From one year to the next July's mean temperature typically moves about 2.6°F either way (NOAA's standard deviation), so roughly two Julys in three average between 73°F and 79°F.
Bars above: each day's normal high to low. Columns below: the chance of 0.01 inch or more of precipitation that day, on a scale of 0 to 100% (highest 36%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| July 1 | 86°F | 66°F | 36% | 23% |
| July 8 | 86°F | 66°F | 35% | 23% |
| July 15 | 86°F | 66°F | 34% | 23% |
| July 22 | 86°F | 66°F | 33% | 22% |
| July 31 | 85°F | 66°F | 31% | 20% |
Every day of July: normal high, low and chance of precipitation (warmest afternoon July 11, coldest night July 1)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| July 1 | 86°F | 66°F | 36% | 23% | 15 h |
| July 2 | 86°F | 66°F | 36% | 23% | 15 h |
| July 3 | 86°F | 66°F | 36% | 23% | 15 h |
| July 4 | 86°F | 66°F | 36% | 23% | 15 h |
| July 5 | 86°F | 66°F | 36% | 23% | 15 h |
| July 6 | 86°F | 66°F | 35% | 23% | 14 h 50 min |
| July 7 | 86°F | 66°F | 35% | 23% | 14 h 50 min |
| July 8 | 86°F | 66°F | 35% | 23% | 14 h 50 min |
| July 9 | 86°F | 66°F | 35% | 23% | 14 h 50 min |
| July 10 | 86°F | 66°F | 35% | 23% | 14 h 50 min |
| July 11 | 86°F | 66°F | 34% | 23% | 14 h 50 min |
| July 12 | 86°F | 66°F | 34% | 23% | 14 h 50 min |
| July 13 | 86°F | 66°F | 34% | 23% | 14 h 50 min |
| July 14 | 86°F | 66°F | 34% | 23% | 14 h 50 min |
| July 15 | 86°F | 66°F | 34% | 23% | 14 h 50 min |
| July 16 | 86°F | 66°F | 34% | 23% | 14 h 40 min |
| July 17 | 86°F | 66°F | 34% | 23% | 14 h 40 min |
| July 18 | 86°F | 66°F | 33% | 23% | 14 h 40 min |
| July 19 | 86°F | 66°F | 33% | 22% | 14 h 40 min |
| July 20 | 86°F | 66°F | 33% | 22% | 14 h 40 min |
| July 21 | 86°F | 66°F | 33% | 22% | 14 h 40 min |
| July 22 | 86°F | 66°F | 33% | 22% | 14 h 40 min |
| July 23 | 86°F | 66°F | 33% | 22% | 14 h 30 min |
| July 24 | 86°F | 66°F | 32% | 22% | 14 h 30 min |
| July 25 | 86°F | 66°F | 32% | 22% | 14 h 30 min |
| July 26 | 86°F | 66°F | 32% | 21% | 14 h 30 min |
| July 27 | 86°F | 66°F | 32% | 21% | 14 h 30 min |
| July 28 | 86°F | 66°F | 31% | 21% | 14 h 20 min |
| July 29 | 86°F | 66°F | 31% | 21% | 14 h 20 min |
| July 30 | 86°F | 66°F | 31% | 20% | 14 h 20 min |
| July 31 | 85°F | 66°F | 31% | 20% | 14 h 20 min |
- Normal high
- 86°FJuly average
- Normal low
- 66°FJuly average
- Precipitation
- 3.95 inmonth total
- Days with precipitation
- 110.01 inch or more
- Days at 90°F or more
- 6
- Daylight
- 15 h to 14 h 20 minJuly 1 to July 31
- Days at 70°F or more
- 31
- Days at 80°F or more
- 25
- Sunshine
- 79%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00093815; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Dayton in July?
On a given July day the chance of 0.01 inch or more is 34% on average, highest around July 1 (36%). In all, 3.95 in falls on 11 days of a normal July, 1 of them with an inch or more.
In a normal July in Dayton, 6 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00093815.
How humid and windy is Dayton in July?
At 3 p.m. the normal temperature is 82°F with 52% relative humidity and a dew point of 63°F; at 6 a.m. it is 66°F with 88% humidity. The wind averages 7.0 mph, most often from the west in the afternoon.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 66°F | 62°F | 88% | 5.3 mph | 50% |
| 9 a.m. | 74°F | 64°F | 71% | 6.9 mph | 48% |
| noon | 80°F | 63°F | 57% | 8.7 mph | 25% |
| 3 p.m. | 82°F | 63°F | 52% | 9.5 mph | 24% |
| 6 p.m. | 80°F | 63°F | 56% | 8.9 mph | 37% |
| 9 p.m. | 73°F | 64°F | 72% | 6.0 mph | 56% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00093815. Hourly normals exist only for NOAA's first-order stations; a dash where NOAA publishes no value for that hour (the sky at some hours).
What are the records for July in Dayton?
The warmest July temperature on Dayton's official record (since 1893) is 108°F, on July 22, 1901; the coldest is 44°F, on July 6, 1972. The wettest July brought 8.55 in (1990).
The July mean against the 1991-2020 normal of 76.0°F: 2021 75.3°F (−0.7), 2022 76.5°F (+0.5), 2023 76.0°F (at normal), 2024 75.2°F (−0.8), 2025 77.8°F (+1.8), 2026 76.0°F (at normal). 2 of 6 ran warmer than normal.
| July | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 75.3°F | −0.7°F | 5.39 in |
| 2022 | 76.5°F | +0.5°F | 6.03 in |
| 2023 | 76.0°F | at normal | 3.85 in |
| 2024 | 75.2°F | −0.8°F | 3.73 in |
| 2025 | 77.8°F | +1.8°F | 4.17 in |
| 2026 | 76.0°F | at normal | 2.99 in |
Source: records: ACIS, NWS threaded record DAYthr; recent months: ACIS, station USW00093815. Records and recent months use complete months only.
How does July in Dayton compare across Ohio?
Across the 99 places PlainClimate covers in Ohio, July normal highs run from 81°F in Hiram to 87°F in Fairfield; Dayton's is 86°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.