Sierra Vista in Summer
In summer (June, July and August), Sierra Vista sees average daytime highs around 89°F and overnight lows near 65°F, with 5.6 in of rain over about 29 wet days across the season. It is the warmest season of the year and the wettest season of the year.
Across summer, daytime highs hold fairly steady around 89°F. The sky is clear or mostly clear about 47% of the time across summer, and the air most often feels dry.
Summer is Sierra Vista's weakest season of the year to visit on our travel score. For the whole year in context, see Sierra Vista's year-round climate.
- Avg daytime high
- 89°F
- warmest season of the year
- Avg overnight low
- 65°F
- Rainfall
- 5.6 in
- 29 wet days
- Avg wind
- 5 mph
- Travel score
- 4.2
- weakest season of the year
- Months
- Jun · Jul · Aug
Temperature in Sierra Vista in Summer
Across summer, daytime highs hold fairly steady around 89°F.
A typical summer day in Sierra Vista reaches about 89°F and drops to 65°F overnight. The warmest of the three months is June, the coolest June.
How summer really feels in Sierra Vista
Once humidity and wind are folded in, summer brings about 41 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.
Sierra Vista 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 | 59° / 35° | 0.9 | 3.6 | 0.6 | 10.2 | 5.6 |
| Feb | 62° / 37° | 0.8 | 4 | 0.5 | 10.8 | 6.4 |
| Mar | 68° / 41° | 0.5 | 2.7 | 0.4 | 11.8 | 7.9 |
| Apr | 75° / 46° | 0.2 | 1.5 | 0.1 | 12.7 | 8.8 |
| May | 84° / 53° | 0.2 | 1.6 | 0 | 13.6 | 7.3 |
| Jun | 92° / 62° | 0.4 | 2.9 | 0 | 14 | 4.3 |
| Jul | 90° / 67° | 2.7 | 12.8 | 0 | 13.8 | 3.8 |
| Aug | 87° / 65° | 2.5 | 12.8 | 0 | 13.2 | 4.6 |
| Sep | 84° / 62° | 1.4 | 6.1 | 0 | 12.2 | 6.3 |
| Oct | 77° / 52° | 0.5 | 2.9 | 0 | 11.2 | 8.5 |
| Nov | 67° / 43° | 0.6 | 2.3 | 0.1 | 10.4 | 7.8 |
| Dec | 58° / 35° | 0.9 | 3.9 | 1.1 | 10 | 5.3 |
Cloud cover in Summer
The sky is clear or mostly clear about 47% of the time across summer.
Chance of precipitation in Summer
Sierra Vista gets around 5.6 in of rain over 29 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 13 h 54 min 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 7.2 kWh/m².
Is summer a good time to visit Sierra Vista?
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 Sierra Vista for sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Sierra Vista in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Sierra Vista sees daytime highs around 89°F and nights near 65°F. Pack light clothes and sun protection. Worth having: rain gear. About 29 days see rain.
UV index in Sierra Vista in Summer
Clear-sky midday UV across summer averages around 12 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Sierra Vista peaks around June 22 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 19 at about 4 (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 | 5 | 7 | 10 | 10 | 12 | 12 | 12 | 10 | 7 | 5 | 4 |
| Level | Moderate | High | High | Very high | Very high | Extreme | Extreme | Extreme | Very high | Very high | High | Moderate |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 4 | Moderate |
| Feb | 5 | High |
| Mar | 7 | High |
| Apr | 10 | Very high |
| May | 10 | Very high |
| Jun | 12 | Extreme |
| Jul | 12 | Extreme |
| Aug | 12 | Extreme |
| Sep | 10 | Very high |
| Oct | 7 | Very high |
| Nov | 5 | High |
| Dec | 4 | Moderate |
Where is Sierra Vista?
Sierra Vista sits at 31.6°N, 110.3°W, 4,633 ft above sea level, in United States. The nearest listed city is Cananea, 39 mi away.
Topography around Sierra Vista
How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Sierra Vista.
Within 2 miles, the terrain around Sierra Vista has only modest variations in elevation — a maximum elevation change of 377 ft around an average of 4,646 ft above sea level; within 10 miles, very significant variations in elevation — a maximum elevation change of 5,213 ft; within 50 miles, very significant variations in elevation — a maximum elevation change of 7,077 ft.
The land around Sierra Vista is covered by grassland (32%), artificial surfaces (32%) and shrubs (31%) within 2 miles, shrubs (62%) within 10 miles, and shrubs (67%) and grassland (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 Sierra Vista (31.5545°, -110.3037°, elevation 4,633 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.