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Sierra Vista, Arizona climate
BSk Cold semi-arid
Sierra Vista has a seasonal mild-temperate climate (Cold semi-arid, Köppen BSk). The hottest month is July with an average daily high near 33°C, while the coldest is January averaging around −1°C at night. Precipitation totals about 330 mm a year and is strongly seasonal — July alone averages 90 mm while May barely receives 5 mm.
Temperature & precipitation
Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figuresClear vs cloudy days
Share of days each month that are clear, partly cloudy or cloudy · 1991–2020 · hover a month for the day countsSierra Vista climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 16 | 18 | 21 | 25 | 29 | 34 | 33 | 32 | 30 | 27 | 21 | 16 |
| Avg temp (°C) | 7 | 9 | 12 | 16 | 20 | 25 | 25 | 24 | 22 | 18 | 12 | 8 |
| Avg low (°C) | −1 | 0 | 3 | 6 | 10 | 15 | 17 | 16 | 14 | 8 | 3 | −1 |
| Precipitation (mm) | 20 | 16 | 12 | 6 | 5 | 14 | 90 | 84 | 33 | 15 | 13 | 22 |
| Snowfall (cm) | 1 | — | — | — | — | — | — | — | — | — | — | — |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 16 | 18 | 21 | 25 | 29 | 34 |
| Avg temp (°C) | 7 | 9 | 12 | 16 | 20 | 25 |
| Avg low (°C) | −1 | 0 | 3 | 6 | 10 | 15 |
| Precipitation (mm) | 20 | 16 | 12 | 6 | 5 | 14 |
| Snowfall (cm) | 1 | — | — | — | — | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 33 | 32 | 30 | 27 | 21 | 16 |
| Avg temp (°C) | 25 | 24 | 22 | 18 | 12 | 8 |
| Avg low (°C) | 17 | 16 | 14 | 8 | 3 | −1 |
| Precipitation (mm) | 90 | 84 | 33 | 15 | 13 | 22 |
| Snowfall (cm) | — | — | — | — | — | — |
How often — frequency of weather events
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 3 | 3 | 2 | 1 | 1 | 2 | 11 | 10 | 4 | 2 | 2 | 3 |
| Days with high ≥ 32°C (days) | 0.0 | — | — | 0.9 | 8 | 22 | 19 | 16 | 10 | 2 | — | — |
| Days with low ≤ 0°C (days) | 12 | 6 | 3 | 0.3 | — | — | — | — | — | 0.3 | 3 | 12 |
| Days with snowfall ≥ 2.5 cm (days) | 0.1 | 0.0 | — | — | — | — | — | — | — | — | — | 0.0 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 3 | 3 | 2 | 1 | 1 | 2 |
| Days with high ≥ 32°C (days) | 0.0 | — | — | 0.9 | 8 | 22 |
| Days with low ≤ 0°C (days) | 12 | 6 | 3 | 0.3 | — | — |
| Days with snowfall ≥ 2.5 cm (days) | 0.1 | 0.0 | — | — | — | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 11 | 10 | 4 | 2 | 2 | 3 |
| Days with high ≥ 32°C (days) | 19 | 16 | 10 | 2 | — | — |
| Days with low ≤ 0°C (days) | — | — | — | 0.3 | 3 | 12 |
| Days with snowfall ≥ 2.5 cm (days) | — | — | — | — | — | 0.0 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 37 | 41 | 34 | 26 | 23 | 26 | 61 | 56 | 35 | 25 | 30 | 36 |
| Clear days (≤ 30% cloud) | 16 | 13 | 17 | 20 | 21 | 19 | 5 | 6 | 15 | 21 | 18 | 16 |
| Partly cloudy days (30–70%) | 8 | 8 | 9 | 8 | 7 | 7 | 12 | 14 | 10 | 7 | 7 | 10 |
| Cloudy days (≥ 70%) | 7 | 7 | 6 | 3 | 3 | 4 | 14 | 11 | 5 | 3 | 5 | 6 |
| Relative humidity (%) | 53 | 49 | 42 | 32 | 26 | 23 | 47 | 53 | 50 | 44 | 46 | 53 |
| Wind speed (mph) | 5.5 | 6.0 | 6.2 | 6.8 | 6.6 | 6.1 | 4.7 | 4.0 | 4.6 | 5.1 | 5.4 | 5.4 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 37 | 41 | 34 | 26 | 23 | 26 |
| Clear days (≤ 30% cloud) | 16 | 13 | 17 | 20 | 21 | 19 |
| Partly cloudy days (30–70%) | 8 | 8 | 9 | 8 | 7 | 7 |
| Cloudy days (≥ 70%) | 7 | 7 | 6 | 3 | 3 | 4 |
| Relative humidity (%) | 53 | 49 | 42 | 32 | 26 | 23 |
| Wind speed (mph) | 5.5 | 6.0 | 6.2 | 6.8 | 6.6 | 6.1 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 61 | 56 | 35 | 25 | 30 | 36 |
| Clear days (≤ 30% cloud) | 5 | 6 | 15 | 21 | 18 | 16 |
| Partly cloudy days (30–70%) | 12 | 14 | 10 | 7 | 7 | 10 |
| Cloudy days (≥ 70%) | 14 | 11 | 5 | 3 | 5 | 6 |
| Relative humidity (%) | 47 | 53 | 50 | 44 | 46 | 53 |
| Wind speed (mph) | 4.7 | 4.0 | 4.6 | 5.1 | 5.4 | 5.4 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from NOAA's U.S. Climate Normals, measured at Sierra Vista (NOAA GHCN station USC00027880), about 3 km from the city centre.
Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.