Grand Canyon in Summer
In summer (June, July and August), Grand Canyon sees average daytime highs around 88°F and overnight lows near 62°F, with 1.7 in of rain over about 12 wet days across the season. It is the warmest season of the year and the driest season of the year.
Across summer, daytime highs hold fairly steady around 88°F. The sky is clear or mostly clear about 61% of the time across summer, and the air most often feels dry.
Summer is Grand Canyon's 3rd-best season to visit on our travel score. For the whole year in context, see Grand Canyon's year-round climate.
- Avg daytime high
- 88°F
- warmest season of the year
- Avg overnight low
- 62°F
- Rainfall
- 1.7 in
- 12 wet days
- Avg wind
- 5 mph
- Travel score
- 5.3
- 3rd-best season
- Months
- Jun · Jul · Aug
Temperature in Grand Canyon in Summer
Across summer, daytime highs hold fairly steady around 88°F.
A typical summer day in Grand Canyon reaches about 88°F and drops to 62°F overnight. The warmest of the three months is July, the coolest June.
How summer really feels in Grand Canyon
Once humidity and wind are folded in, summer brings about 35 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.
Grand Canyon 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 | 46° / 25° | 1.4 | 5.3 | 3.4 | 9.8 | 1.3 |
| Feb | 50° / 29° | 1.5 | 6.5 | 3.8 | 10.6 | 2.5 |
| Mar | 58° / 34° | 1.1 | 5.2 | 1.9 | 11.7 | 5.0 |
| Apr | 65° / 40° | 0.8 | 4.1 | 1.2 | 12.9 | 7.1 |
| May | 76° / 49° | 0.4 | 2.2 | 0.1 | 13.9 | 8.5 |
| Jun | 87° / 58° | 0.1 | 0.9 | 0 | 14.4 | 6.2 |
| Jul | 90° / 65° | 0.8 | 5.5 | 0 | 14.2 | 4.4 |
| Aug | 88° / 63° | 0.8 | 5.1 | 0 | 13.4 | 5.2 |
| Sep | 81° / 56° | 0.8 | 3.9 | 0 | 12.2 | 7.7 |
| Oct | 69° / 44° | 0.8 | 3.5 | 0.3 | 11.1 | 8.0 |
| Nov | 57° / 33° | 0.8 | 3.6 | 1.2 | 10.1 | 4.9 |
| Dec | 46° / 26° | 1.2 | 5.3 | 3.6 | 9.6 | 1.4 |
Cloud cover in Summer
The sky is clear or mostly clear about 61% of the time across summer.
Chance of precipitation in Summer
Grand Canyon gets around 1.7 in of rain over 12 wet days across summer. The line is the day-by-day chance of measurable precipitation.
Humidity in Summer
Most of summer feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Summer
Winds average 5 mph across summer.
Sunrise & sunset in Summer
Daylight runs from about 14 h 18 min in early June to 12 h 48 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 7.7 kWh/m².
Is summer a good time to visit Grand Canyon?
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 reasonable time to visit Grand Canyon for sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Grand Canyon in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Grand Canyon sees daytime highs around 88°F and nights near 62°F. Pack light clothes and sun protection. About 12 days see rain.
UV index in Grand Canyon in Summer
Clear-sky midday UV across summer averages around 11 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Grand Canyon peaks around July 17 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 17 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) | 4 | 4 | 6 | 6 | 9 | 11 | 12 | 11 | 9 | 6 | 4 | 3 |
| Level | Moderate | Moderate | High | High | Very high | Extreme | Extreme | Extreme | Very high | High | Moderate | Moderate |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 4 | Moderate |
| Feb | 4 | Moderate |
| Mar | 6 | High |
| Apr | 6 | High |
| May | 9 | Very high |
| Jun | 11 | Extreme |
| Jul | 12 | Extreme |
| Aug | 11 | Extreme |
| Sep | 9 | Very high |
| Oct | 6 | High |
| Nov | 4 | Moderate |
| Dec | 3 | Moderate |
Where is Grand Canyon?
Grand Canyon sits at 36.1°N, 112.1°W, 0 ft above sea level, in United States. The nearest listed city is Flagstaff, 65 mi away.
Topography around Grand Canyon
How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Grand Canyon.
Within 2 miles, the terrain around Grand Canyon has large variations in elevation — a maximum elevation change of 3,527 ft around an average of 6,434 ft above sea level; within 10 miles, very significant variations in elevation — a maximum elevation change of 5,873 ft; within 50 miles, extreme variations in elevation — a maximum elevation change of 8,550 ft.
The land around Grand Canyon is covered by trees (71%) within 2 miles, trees (45%) and grassland (21%) within 10 miles, and grassland (42%), trees (23%) and bare terrain (23%) 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 Grand Canyon (36.0544°, -112.1393°, elevation 0 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.