Tacna has warm winters and scorching summers, with very little rain
A typical July afternoon reaches 108°, a January night drops to 40°, and snow is almost unheard of.
A year in Tacna at a glance
Each month’s typical high and low, and what it brings.
What stands out about Tacna’s climate
Read from where Tacna sits among Arizona’s towns. The page puts what stands out first.
About 288 frost-free days a year
In half of years the last 32° night comes by February 13 and the first by December 1.
Freezing nights by month
Average nights at or below 32°
90° days by month
Average days at 90° or more
Rain and snow in Tacna
February is the wettest month and June the driest. Rain or snow falls on about 17 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
No measurable snow in a normal year.
Warmer than it used to be
The last 30 years in Tacna averaged 2.1° warmer than the 1900s. The biggest change is in August (+2.8°).
A bigger shift than in 96% of U.S. towns.
Change by month
What a year in Tacna feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
Living with Tacna’s climate
What the numbers mean for a garden, a driveway, a furnace and a free afternoon.
288 frost-free days. The last frost comes by Feb 13 in half of years, so many gardeners wait a week or two past that to set out tomatoes. The first fall frost comes by Dec 1.
About 0.0" in a normal winter.
Months averaging under 55° run from December through December. Heating is 22% of the year’s heating-and-cooling load.
About 188 days a year reach 90°, and July afternoons average 108°.
The nicest months are January, February, March and November. 1.0 miles of trails are waiting.
Parks & trails →Normals are averages. Ice storms, nor’easters, floods and heat waves are on the natural hazards page.
Natural hazards →How Tacna compares
Against every U.S. town on TownTapestry, each counted once, with its place in Arizona.
Tacna weather by month
Average highs, lows, rain and snow for every month, from NOAA’s 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 70° | 40° | 0.4" | 0 | 2 | 0 | 50° – 60° |
| February | 74° | 44° | 0.5" | 0 | 2 | 0 | 53° – 64° |
| March | 81° | 49° | 0.4" | 0 | 2 | 0 | 59° – 72° |
| April | 87° | 55° | 0.1" | 0 | 1 | 0 | 66° – 75° |
| May | 95° | 61° | 0.0" | 0 | 0 | 0 | 73° – 84° |
| June | 104° | 70° | 0.0" | 0 | 0 | 0 | 82° – 91° |
| July | 108° | 79° | 0.4" | 0 | 2 | 0 | 88° – 96° |
| August | 107° | 80° | 0.4" | 0 | 2 | 0 | 90° – 97° |
| September | 103° | 73° | 0.4" | 0 | 2 | 0 | 85° – 90° |
| October | 91° | 59° | 0.2" | 0 | 1 | 0 | 71° – 81° |
| November | 78° | 47° | 0.3" | 0 | 1 | 0 | 56° – 68° |
| December | 68° | 39° | 0.4" | 0 | 2 | 0 | 50° – 57° |
| Year | 89° | 58° | 3.6" | 0.0" | 17 | 0 |
Heating and cooling a home in Tacna
22% of the work is heating, so air conditioning is the bigger bill.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. Source: NOAA station normals.
How much a month can swing
A normal is an average. November swings the most: from 1991 to 2020 its average ranged from 56° to 68°. September is the most reliable, staying within 6°.
Common questions about Tacna’s climate
What is the coldest month in Tacna?
December, with a typical high of 68° and a low of 39°.
What is the hottest month in Tacna?
July, with a typical high of 108° and a low of 79°. About 188 days a year reach 90°.
How much snow does Tacna get?
Almost none. A normal year brings 0.0 inches.
When is the first frost in Tacna?
In half of years the first 32° night comes by December 1, and the last spring frost by February 13.
What is the rainiest month in Tacna?
February, with 0.5 inches of rain and melted snow. The year totals 4 inches.
Neighbors talk weather
Gardens, snow, and the best days of the year in Tacna.
Your answer becomes a post in Town Square.
Temperatures and rainfall come from NOAA’s gridded climate normals for Tacna itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Tacna 3 Ne, AZ (3 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000. Today’s forecast: National Weather Service.