Dayton, OH weather in July
Expect warm, often humid weather with frequent rain in Dayton in July, with highs near 87°F and lows near 66°F. Rain falls on about 10 days. It is one of the warmest months in Dayton.
- Normal high
- 87°F
- Normal low
- 66°F
- Wet days
- 10
- 4.0 in total
- Muggy days
- 15
- dew point 65°F+
How July changes from start to finish
| July 1 | July 31 | |
|---|---|---|
| Normal high | 87°F | 86°F |
| Normal low | 66°F | 65°F |
| Chance of a wet day | 35% | 31% |
| Sunrise / sunset | 6:12 am / 9:08 pm | 6:34 am / 8:51 pm |
| Daylight | 14.9 h | 14.3 h |
Chance of a wet day: average for the first and last 7 days of the month. Times are local clock time (Eastern Time).
A typical July day
- 6 am66°Fdew point 63°F
- 9 am75°Fdew point 65°F
- Noon81°Fdew point 64°F
- 3 pm83°Fdew point 64°F
- 6 pm81°Fdew point 64°F
- 9 pm74°Fdew point 65°F
NOAA hourly normals (local standard time) from Wright Patterson AFB (9 mi away); average wind 6 mph; clear or few clouds in 34% of daytime hours, mostly cloudy or overcast in 44%.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F3 of 31
- Hot dayshigh 90°F or more13 of 31
- Muggy daysdaily mean dew point 65°F or more15 of 31
- Wet daysat least 0.01 in of rain or melted snow10 of 31
- Notable rainat least 0.10 in7 of 31
- Freezing nightslow 32°F or below0 of 31
- Snow on the groundsnow depth 1 in or more0 of 31
Average days per July, counted from daily records for each year 1991-2020.
Rain in July
Normal precipitation is 4.0 in; a dry July brings about 3.0 in and a wet one about 4.9 in (25th and 75th percentiles). About 3 days bring half an inch or more, and about 1 an inch or more.
How July varies from year to year
- Warmest July, 1991-20202019: average high 93°F
- Coolest July2009: average high 81°F
- Wettest July1992: 8.9 in
- Driest July1991: 1.1 in
- Highest reading105°F (July 7, 2012)
- Lowest reading52°F (July 29, 2014)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
July compared with June and August
| June | July | August | |
|---|---|---|---|
| Normal high | 84°F | 87°F | 86°F |
| Normal low | 62°F | 66°F | 64°F |
| Wet days | 12 | 10 | 8 |
| Comfortable days | 5 | 3 | 4 |
| Daylight | 14.9 h | 14.7 h | 13.7 h |
Highs change by +3°F from June and -1°F into August.
Nearby alternatives in July
- Cooler: Fayetteville, WV204 mi · high 81°F · 13 wet days
How Dayton ranks in July
- Normal high200th warmest of 378 cities; 1st of 6 in Ohio
- Wet days230th driest of 378
- Comfortable days154th most of 340
What to pack for Dayton in July
- Light, breathable clothing – highs near 87°F and about 15 muggy days
- A rain jacket or umbrella – rain on about 10 days
- Sunglasses and sunscreen – about 14.7 hours of daylight and highs near 87°F
Heating and cooling
July has 1 heating degree days and 349 cooling degree days (base 65°F), 5% of the year's total heating and cooling demand.
Questions
How hot is Dayton in July?
The normal high is 87°F and the normal low is 66°F. From 1991 to 2020 the hottest July reading was 105°F (July 7, 2012).
Does it rain a lot in Dayton in July?
About 10 days in July have at least 0.01 in of precipitation, and the normal total is 4.0 in. The wettest July in 1991-2020 was in 1992 (8.9 in); the driest was in 1991 (1.1 in).
Is July a good time to visit Dayton?
July ranks 7th of 12 months on our comfort score for Dayton (49 out of 100). It has about 3 comfortable days and about 13 days at 90°F or hotter. The best months are April, May and October.
Where the numbers come from
- Temperature, rain and frost dates: Dayton Mcd (USC00332067), 0.3 mi N of the city center, 720 ft . NOAA normals and daily records, 1991-2020.
- Snowfall and snow depth: Dayton Intl Airport (USW00093815), 10 mi N of the city center, 1,000 ft (260 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Humidity and wind by hour and cloud cover: Wright Patterson AFB (USW00013840), 9.1 mi NE of the city center, 823 ft (83 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: J.m.cox Dayton International Airport (724290-93815), 10 mi N of the city center, 993 ft (253 ft higher than the city). Hourly observations, 1991-2020.