Chattanooga, TN weather in July
July in Chattanooga: hot and oppressively humid, with frequent rain. Highs 91°F, lows 71°F, about 12 wet days. This is the peak of the warm season in Chattanooga.
- Normal high
- 91°F
- Normal low
- 71°F
- Wet days
- 12
- 5.1 in total
- Muggy days
- 26
- dew point 65°F+
How July changes from start to finish
| July 1 | July 31 | |
|---|---|---|
| Normal high | 90°F | 91°F |
| Normal low | 70°F | 71°F |
| Chance of a wet day | 39% | 35% |
| Sunrise / sunset | 6:30 am / 8:59 pm | 6:49 am / 8:45 pm |
| Daylight | 14.5 h | 13.9 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 am72°Fdew point 69°F
- 9 am78°Fdew point 69°F
- Noon85°Fdew point 69°F
- 3 pm88°Fdew point 68°F
- 6 pm86°Fdew point 68°F
- 9 pm79°Fdew point 69°F
NOAA hourly normals (local standard time) from Chattanooga Lovell Airport (6 mi away); average wind 4 mph.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F0 of 31
- Hot dayshigh 90°F or more19 of 31
- Muggy daysdaily mean dew point 65°F or more26 of 31
- Wet daysat least 0.01 in of rain or melted snow12 of 31
- Notable rainat least 0.10 in8 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 5.1 in; a dry July brings about 3.4 in and a wet one about 6.7 in (25th and 75th percentiles). About 4 days bring half an inch or more, and about 1 an inch or more.
How July varies from year to year
- Warmest July, 1991-20201993: average high 98°F
- Coolest July2013: average high 86°F
- Wettest July1994: 11.9 in
- Driest July1993: 1.3 in
- Highest reading107°F (July 1, 2012)
- Lowest reading57°F (July 1, 2008)
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 | 88°F | 91°F | 90°F |
| Normal low | 67°F | 71°F | 70°F |
| Wet days | 11 | 12 | 9 |
| Comfortable days | 1 | 0 | 0 |
| Daylight | 14.5 h | 14.2 h | 13.4 h |
Highs change by +3°F from June and -1°F into August.
Nearby alternatives in July
- Cooler: Gatlinburg, TN111 mi · high 83°F · 15 wet days
How Chattanooga ranks in July
- Normal high135th warmest of 378 cities; 3rd of 7 in Tennessee
- Wet days313th driest of 378
- Comfortable days308th most of 340
What to pack for Chattanooga in July
- Light, breathable clothing – highs near 91°F and about 26 muggy days
- A rain jacket or umbrella – rain on about 12 days
- Sunglasses and sunscreen – about 14.2 hours of daylight and highs near 91°F
Heating and cooling
July has 0 heating degree days and 488 cooling degree days (base 65°F), 10% of the year's total heating and cooling demand.
Questions
How hot is Chattanooga in July?
The normal high is 91°F and the normal low is 71°F. From 1991 to 2020 the hottest July reading was 107°F (July 1, 2012).
Does it rain a lot in Chattanooga in July?
About 12 days in July have at least 0.01 in of precipitation, and the normal total is 5.1 in. The wettest July in 1991-2020 was in 1994 (11.9 in); the driest was in 1993 (1.3 in).
Is July a good time to visit Chattanooga?
July ranks 11th of 12 months on our comfort score for Chattanooga (40 out of 100). It has almost no comfortable days and about 19 days at 90°F or hotter. The best months are April and October.
Where the numbers come from
- Temperature, rain, snowfall, snow depth, frost dates and humidity and wind by hour: Chattanooga Lovell Airport (USW00013882), 6.2 mi E of the city center, 671 ft . NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Lovell Field Airport (723240-13882), 6.3 mi E of the city center, 669 ft . Hourly observations, 1991-2020.
- Not available for this location: cloud cover (no station close enough or similar enough in elevation).