Rockwall in Summer
In summer (June, July and August), Rockwall sees average daytime highs around 92°F and overnight lows near 74°F, with 7.3 in of rain over about 21 wet days across the season. It is the warmest season of the year and the driest season of the year.
Over the season highs climb from about 87°F in early June to 92°F by late August. The sky is clear or mostly clear about 52% of the time across summer, and the air most often feels oppressive.
Summer is Rockwall's weakest season of the year to visit on our travel score. For the whole year in context, see Rockwall's year-round climate.
- Avg daytime high
- 92°F
- warmest season of the year
- Avg overnight low
- 74°F
- Rainfall
- 7.3 in
- 21 wet days
- Avg wind
- 7 mph
- Travel score
- 3.7
- weakest season of the year
- Months
- Jun · Jul · Aug
Temperature in Rockwall in Summer
Over the season highs climb from about 87°F in early June to 92°F by late August.
A typical summer day in Rockwall reaches about 92°F and drops to 74°F overnight. The warmest of the three months is July, the coolest June.
How summer really feels in Rockwall
Once humidity and wind are folded in, summer brings about 89 days that feel above 90°F and 0 that feel at or below 32°F.
The story in summer is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
Rockwall weather by month
How the three summer months (June, July and August) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°F) | Rainfall (inches) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | 56° / 37° | 2.8 | 7.2 | 0.4 | 10.1 | 4.0 |
| Feb | 60° / 41° | 3.0 | 7.8 | 0.6 | 10.8 | 5.0 |
| Mar | 67° / 48° | 4.1 | 9.5 | 0.2 | 11.7 | 6.3 |
| Apr | 74° / 56° | 4.5 | 9.1 | 0 | 12.8 | 7.1 |
| May | 82° / 65° | 5.4 | 11.3 | 0 | 13.7 | 6.0 |
| Jun | 89° / 72° | 3.4 | 8.9 | 0 | 14.1 | 4.3 |
| Jul | 93° / 76° | 1.9 | 6.2 | 0 | 14 | 3.3 |
| Aug | 93° / 75° | 2.1 | 5.6 | 0 | 13.2 | 3.4 |
| Sep | 87° / 69° | 2.7 | 6.6 | 0 | 12.2 | 5.3 |
| Oct | 77° / 57° | 4.0 | 7.9 | 0 | 11.2 | 7.4 |
| Nov | 66° / 47° | 3.7 | 7.3 | 0.1 | 10.3 | 6.5 |
| Dec | 57° / 39° | 3.8 | 7.5 | 0.2 | 9.9 | 4.4 |
Cloud cover in Summer
The sky is clear or mostly clear about 52% of the time across summer.
Chance of precipitation in Summer
Rockwall gets around 7.3 in of rain over 21 wet days across summer. The line is the day-by-day chance of measurable precipitation.
Humidity in Summer
Most of summer feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Summer
Winds average 7 mph across summer.
Sunrise & sunset in Summer
Daylight runs from about 14 hours in early June to 12 h 42 min by late August. The lit band spans sunrise to sunset each day.
Solar energy in Summer
Average shortwave solar energy reaching the ground each day across summer, about 6.5 kWh/m².
Hazard calendar for Rockwall
In summer, Rockwall overlaps its atlantic hurricane season. The full year is below, with each hazard's peak months called out.
Rockwall sits in the Atlantic hurricane belt; the season peaks August–October.
Is summer a good time to visit Rockwall?
Our two travel scores rate summer for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
summer is a weaker month for outdoor sightseeing in Rockwall. The water and warmth also suit a beach or pool day.
What to pack for Rockwall in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Rockwall sees daytime highs around 92°F and nights near 74°F. Pack light clothes and sun protection. Worth having: rain gear. About 21 days see rain.
UV index in Rockwall in Summer
Clear-sky midday UV across summer averages around 10 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Rockwall peaks around June 23 at about 10 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 3 (moderate).
The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 3 | 5 | 6 | 10 | 10 | 10 | 10 | 10 | 8 | 6 | 5 | 3 |
| Level | Moderate | Moderate | High | Very high | Very high | Extreme | Extreme | Extreme | Very high | High | Moderate | Moderate |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 3 | Moderate |
| Feb | 5 | Moderate |
| Mar | 6 | High |
| Apr | 10 | Very high |
| May | 10 | Very high |
| Jun | 10 | Extreme |
| Jul | 10 | Extreme |
| Aug | 10 | Extreme |
| Sep | 8 | Very high |
| Oct | 6 | High |
| Nov | 5 | Moderate |
| Dec | 3 | Moderate |
Air quality in Rockwall in Summer
Average fine-particle pollution (PM2.5) through the year — so you can see where summer falls, not just the annual average.
Air quality in Rockwall is worst in July — around 19 µg/m³ PM2.5 (moderate), about 2.6× the cleanest month (October, 8 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 8 | 8 | 10 | 11 | 14 | 16 | 19 | 15 | 11 | 8 | 8 | 8 |
| Level | Good | Good | Good | Good | Moderate | Moderate | Moderate | Moderate | Good | Good | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 8 | Good |
| Feb | 8 | Good |
| Mar | 10 | Good |
| Apr | 11 | Good |
| May | 14 | Moderate |
| Jun | 16 | Moderate |
| Jul | 19 | Moderate |
| Aug | 15 | Moderate |
| Sep | 11 | Good |
| Oct | 8 | Good |
| Nov | 8 | Good |
| Dec | 8 | Good |
Where is Rockwall?
Rockwall sits at 32.9°N, 96.5°W, 591 ft above sea level, in United States. The nearest listed city is Rowlett, 6.2 mi away.
Topography around Rockwall
How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Rockwall.
Within 2 miles, the terrain around Rockwall has only modest variations in elevation — a maximum elevation change of 187 ft around an average of 509 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 279 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 617 ft.
The land around Rockwall is covered by artificial surfaces (32%), grassland (25%) and water (21%) within 2 miles, grassland (41%) within 10 miles, and grassland (47%) and trees (26%) within 50 miles.
United States travel facts
- Power plugs
- Type A / B
- 120 V · 60 Hz
- Prices
- ≈ 100% of US
- price level, 2025
- GDP per capita
- $90,027
- 2025
- Happiness
- 6.8 / 10
- World Happiness, 2025
- Safe drinking water
- 98%
- of population, 2024
- Homicide rate
- 5.8
- per 100k, 2023
- Road deaths
- 12.7
- per 100k/yr, 2019
- Income group
- High
- World Bank
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Rockwall (32.9312°, -96.4597°, elevation 591 ft), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google.