Sierra Vista climate — normals and trends
Sierra Vista (United States) has a cold semi-arid climate (BSk) under the Köppen-Geiger classification. Its mean annual temperature is 16.0 °C and it receives 305 mm of precipitation per year.
These figures are normals computed over 86 complete calendar years, from 1940 to 2025, using ERA5 reanalysis data from the Copernicus programme.
The warmest month is June (24.9 °C on average) and the coldest is January (6.8 °C). Rainfall peaks in August.
Sierra Vista averages 35 frost days, 84 hot days (≥ 30 °C) and 61 rainy days per year.
Sierra Vista has warmed by +2.6 °C between 1940 and 2025, or +0.31 °C per decade. This trend is statistically significant.
The number of frost days there went from about 49 to 21 per year over the period.
The hottest day of the period reached 41.3 °C (on 28 June 1994) and the coldest -19.8 °C (on 8 December 1978).
Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.
Climate normals · ERA5
Sierra VistaArizona
- coords
- 31.55°, -110.30°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
16.0°C
Average daily high
23.4°C
Average daily low
9.3°C
Annual rainfall
305mm
Sunshine / day
11.3h
Mean relative humidity
42%
Average peak wind
16.1km/h
Seasonal range
18.1°C
Frost days (< 0 °C)
35 d/yr
Hot days (≥ 30 °C)
84 d/yr
Rainy days (≥ 1 mm)
61 d/yr
Annual snowfall
8.8 cm
Average feels-like high
20.8 °C
Average feels-like low
6.7 °C
Average peak gust
37.4 km/h
Tropical nights (≥ 20 °C)
17 d/yr
Solar radiation
21.5 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.6 °C
since 1940
+0.3 °C per decade · r² = 0.63 · p = < 0.001
Trend fitted by linear regression (ordinary least squares) on annual means. A trend is shown only when it is statistically significant (p < 0.05).
A climograph overlays rainfall (bars) and temperature (line): the standard reading in climatology, where you can see at a glance whether the warm season is also the dry one.
Records for the period
Hottest day
41.3 °C
28 June 1994
Coldest day
-19.8 °C
8 December 1978
Wettest day
69 mm
8 August 1944
Windiest day
47.2 km/h
14 March 1944
Strongest gust
104.4 km/h
30 November 1982
Hottest feels-like
40.7 °C
21 June 2017
Coldest feels-like
-24.8 °C
8 December 1978
Snowiest day
24.2 cm
15 December 1967
Sunniest day
13.8 h
23 June 1945
Normals computed over complete calendar years 1940–2025.
A specific year
Pick a year and see how it compares to normal — warmer, drier or more extreme than usual?
Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 14.5 °C | +0.4 °C | 7 mm | -15 mm |
| Feb | 21.9 °C | +5.8 °C | 1 mm | -16 mm |
| Mar | 20.9 °C | +2.0 °C | 9 mm | -7 mm |
| Apr | 24.6 °C | +1.4 °C | 4 mm | -4 mm |
| May | 28.8 °C | +1.0 °C | 1 mm | -5 mm |
| Jun | 35.0 °C | +2.3 °C | 21 mm | +9 mm |
| Jul | 33.1 °C | +1.6 °C | 78 mm | +9 mm |
| Aug | 33.8 °C | +3.9 °C | 35 mm | -35 mm |
| Sep | 29.8 °C | +1.1 °C | 72 mm | +38 mm |
| Oct | 26.7 °C | +2.2 °C | 59 mm | +42 mm |
| Nov | 22.0 °C | +3.3 °C | 13 mm | -0 mm |
| Dec | 20.5 °C | +6.0 °C | 7 mm | -16 mm |
The year's extremes
What was the weather like that day?
Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.
Frequently asked questions
What is the climate of Sierra Vista?
Sierra Vista has a cold semi-arid climate (Köppen BSk). Over 1940-2025, the average annual temperature is 16.0 °C and it receives 305 mm of precipitation per year.
What is the hottest day ever recorded in Sierra Vista?
The hottest day measured in Sierra Vista between 1940 and 2025 was 28 June 1994, reaching 41.3 °C.
What is the coldest day in Sierra Vista?
The coldest day measured in Sierra Vista between 1940 and 2025 was 8 December 1978, at -19.8 °C.
Does it snow in Sierra Vista?
Yes. Sierra Vista gets on average 8.8 cm of snow per year and has around 35 frost days.
Has the climate of Sierra Vista warmed?
Yes: Sierra Vista warmed by +2.6 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Sierra Vista?
The wettest day measured in Sierra Vista between 1940 and 2025 was 8 August 1944, with 69 mm of rain in 24 hours.
What was the windiest day in Sierra Vista?
The windiest day measured in Sierra Vista between 1940 and 2025 was 14 March 1944, with winds reaching 47.2 km/h.
What is the warmest month in Sierra Vista?
The warmest month in Sierra Vista is June (24.9 °C on average); the coldest is January (6.8 °C).
How much does it rain in Sierra Vista?
Sierra Vista receives on average 305 mm of precipitation per year, spread over about 61 rainy days.
Is it sunny in Sierra Vista?
Sierra Vista gets on average 11.3 hours of sunshine per day, roughly 4,125 hours per year over 1940-2025.
What is the biggest single-day snowfall in Sierra Vista?
The heaviest 24-hour snowfall measured in Sierra Vista between 1940 and 2025 was 15 December 1967, with 24.2 cm.
Are there tropical nights in Sierra Vista?
Yes: Sierra Vista has on average 17 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Sierra Vista?
In Sierra Vista, between 1940 and 2025, the highest apparent temperature reached 40.7 °C on 21 June 2017, and the lowest was -24.8 °C on 8 December 1978.
Compare Sierra Vista with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Sierra Vista