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Sierra Vista Southeast, AZ Weather
Sierra Vista Southeast, Arizona sits at 31.4525, -110.2190. Its warmest month is June, when the day usually reaches 94F, and its coldest is January, when the night usually falls to 33F. July is the wettest, with rain on about 11 days. The hottest day in the station record is 110F on June 20, 2017, and the coldest night 4F on February 3, 2011. This page carries live conditions, an hour by hour timeline, a ten day outlook, radar, monthly averages and searchable daily history back to 1940.
About Sierra Vista Southeast weather
Sierra Vista Southeast sits at 31.4525, -110.2190 and covers about 110.705 square miles. The forecast above is live: current conditions lead with the HRRR model, corrected against the nearest reporting station and against radar overhead, because a model can lag a storm and the radar cannot.
The tabs at the top of this page carry the hour by hour timeline, the ten day outlook and live radar. Where the models disagree about a day, the rock says so on the day rather than quietly picking a winner.
The rock grades itself against what actually happened and publishes the result whether it flatters it or not. Those standings live in the Receipts.
Where these numbers come from
Current conditions and forecast: NOAA forecast grids (the National Weather Service digital forecast, the National Blend of Models, HRRR and GFS) decoded on our own server, corrected against the nearest reporting station and our own radar. Open-Meteo is consulted only as a fallback when our server is silent.
Radar: NOAA MRMS merged reflectivity, rendered into tiles by myweatherrock.
Monthly averages and records: computed by myweatherrock from NOAA GHCN-Daily station records at the nearest qualifying station, named on this page with its distance. Measurements, not estimates.
Daily history search: the town's own NOAA GHCN-Daily station file, held on our server, measurements by day. Months the station missed fall back to the Open-Meteo historical archive (reanalysis), and the page says so when it does.
What the weather is usually like in Sierra Vista Southeast
Sierra Vista Southeast is warmest in June, when the day usually reaches 94F, and coldest in January, when the night usually falls to 33F. July is the wettest month, with rain on about 11 days of it.
Usual high and low, by month
Days with rain, by month
The same year as numbers
Month
Usual high
Usual low
Rain days
Snow days
January
62F
33F
4
0
February
65F
36F
4
0
March
71F
41F
2
0
April
78F
47F
1
0
May
86F
54F
1
0
June
94F
63F
2
0
July
92F
66F
11
0
August
90F
65F
10
0
September
88F
60F
4
0
October
81F
51F
2
0
November
70F
40F
2
0
December
62F
33F
3
0
Thirty-year normals, 1991 to 2020, computed from the daily record, measured at the Sierra Vista station 6.9 miles away. A rain day means at least a hundredth of an inch fell, the same measurable-precipitation mark the Weather Service uses. Source: computed from the station record, NOAA GHCN daily.
Sierra Vista Southeast weather history, back to 1940
Pick any month back to 1940 and see what the archive holds for Sierra Vista Southeast: the reanalysis record of what happened, day by day.
Reading this month last year to start you off.
Sierra Vista Southeast weather records
In 55,042 days of observations Sierra Vista Southeast has been as hot as 110F and as cold as 4F. Not averages: the actual days.
Hottest day
110F
June 20, 2017
Coldest night
4F
February 3, 2011
Wettest day
2.78 in
November 28, 2019
Biggest snow
4.0 in
January 7, 1997
NOAA GHCN daily station records, observed 1982 to 2026: temperature at the Sierra Vista station, 6.9 miles away; precipitation at the Hereford 4.0 W station, 3.2 miles away. Station measurements, not estimates. Record dates reflect the station's own observation schedule, and the official state record may live at a different station.
Common questions about Sierra Vista Southeast weather
Common questions
What is the weather usually like in Sierra Vista Southeast, AZ?
Sierra Vista Southeast is warmest in June, when the day usually reaches 94F, and coldest in January, when the night usually falls to 33F. Rain falls on roughly 46 days a year, most often in July. Averages are thirty-year normals, 1991 to 2020, computed from the nearest NOAA station's own daily record.
How much does it rain in Sierra Vista Southeast, AZ?
About 46 days a year see at least a hundredth of an inch, which is the Weather Service's measurable-precipitation mark. July is the wettest month with rain on about 11 of its days, and April the driest with about 1.
What is the hottest it has ever been in Sierra Vista Southeast, AZ?
The hottest day measured for Sierra Vista Southeast reached 110F on June 20, 2017, and the coldest night 4F on February 3, 2011. Both are real NOAA station measurements from the GHCN daily archive, observed 1982 to 2026, at the Sierra Vista station. Not estimates, though the official state record may live at a different station.
Can I look up past weather for Sierra Vista Southeast, AZ?
Yes, and for free. The History tab on this page takes any month back to 1940 and shows every day of it: the high, the low, what fell, and that month's hottest and coldest day. No account and no payment.
Is the Sierra Vista Southeast forecast on this page free, and does it track me?
It is free, carries no advertising, and needs no account. Nothing about a visitor leaves the device except the coordinates needed to fetch a forecast, and those are not stored against anyone.