Circle City reaches 100° on about 92 days a year, more than all but 79 U.S. towns
A typical July afternoon reaches 104°, a January night drops to 40°, and snow is almost unheard of.
A year in Circle City at a glance
Each month’s typical high and low, and what it brings.
What stands out about Circle City’s climate
Compared with towns across the U.S., with Circle City’s place in Arizona beside it.
What a year in Circle City feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 306 frost-free days a year
In half of years the last 32° night comes by February 5 and the first by December 11. Frost and day counts come from NOAA’s station at Wittmann 1se, AZ, 4 miles from the town’s center, 190 ft lower.
The 2023 USDA map puts Circle City’s center in zone 9b: the coldest night of a typical winter, averaged over 1991–2020, reaches about 26°. Plant labels use the zone; frost dates tell you when to plant.
Freezing nights by month
Average nights at or below 32°
90° days by month
Average days at 90° or more
About 9 inches of rain a year
February is the wettest month and June the driest. Rain falls on about 36 days a year. Snow is rare: about 0.0" in a normal year at Wittmann 1se, AZ, so most winters see none.
Rain + melted snow by month
Inches of water
Heating and cooling a home in Circle City
31% of the work is heating, so air conditioning is the bigger bill. Months averaging under 55°: December and January.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at Wittmann 1se, AZ.
Living with Circle City’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
306 frost-free days in zone 9b. The last frost comes by Feb 5 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 11.
Months with highs of 62–84° and lows of 40° or more: February, March, April and November. 0.2 miles of trails are waiting.
Parks & trails →Heat waves are 41% of the yearly building losses FEMA expects in Circle City from natural hazards, the largest share. Normals are averages; the hazards page covers the extremes.
Natural hazards →Circle City and similar climates
TownRatings has no climate map of the towns around Circle City yet.
Climates most like Circle City’s, farther away
TownRatings’ own comparison of NOAA 1991–2020 normals, not a NOAA product: places of 5,000+ at least 150 miles away, one per state, closest on January low, July high, precipitation and snow.
| Town | Jan. low | July high | Precip. | Snow |
|---|---|---|---|---|
| Circle City, AZ | 40° | 104° | 9" | 0.0" |
| Desert Hot Springs, CA | 42° | 105° | 7" | 0.8" |
| Henderson, NV | 40° | 105° | 5" | 0.2" |
| St. George, UT | 33° | 103° | 8" | 1.2" |
| Eagle Pass, TX | 41° | 98° | 19" | 0.0" |
Temperatures and precipitation come from NOAA’s 5 km grid; snow and day counts from the stations named on this page.
Warmer than it used to be
The last 30 years in Circle City averaged 2.0° warmer than the 1900s. The biggest change is in March (+2.8°).
A bigger shift than in 90% of U.S. towns.
Change by month
The two periods overlap (1991–2000 is in both), which makes the gap a little smaller than it would be between separate periods.
How Circle City compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Circle City’s place among Arizona’s.
Circle City weather by month
Highs, lows and precipitation from NOAA’s grid at Circle City’s center; snow, wet days and snow on the ground from Wittmann 1se, AZ. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 66° | 40° | 1.2" | 0.0" | 4 | 0 | 49° – 59° |
| February | 68° | 42° | 1.3" | 0.0" | 4 | 0 | 48° – 61° |
| March | 75° | 47° | 1.1" | 0.0" | 3 | 0 | 54° – 67° |
| April | 82° | 52° | 0.2" | 0.0" | 1 | 0 | 61° – 72° |
| May | 91° | 60° | 0.1" | 0.0" | 1 | 0 | 69° – 81° |
| June | 101° | 69° | 0.1" | 0.0" | 0 | 0 | 79° – 89° |
| July | 104° | 77° | 0.9" | 0.0" | 5 | 0 | 86° – 93° |
| August | 102° | 76° | 1.2" | 0.0" | 5 | 0 | 86° – 94° |
| September | 97° | 70° | 1.0" | 0.0" | 3 | 0 | 80° – 86° |
| October | 86° | 57° | 0.5" | 0.0" | 2 | 0 | 67° – 77° |
| November | 74° | 46° | 0.6" | 0.0" | 2 | 0 | 53° – 67° |
| December | 64° | 39° | 1.1" | 0.0" | 4 | 0 | 49° – 57° |
| Year | 84° | 56° | 9.2" | 0.0" | 36 | 0 |
How much a month can swing
A normal is an average. November swings the most: from 1991 to 2020 its average ranged from 53° to 67°. September is the most reliable, staying within 6°.
Where Circle City’s numbers come from
Normals are 30-year averages, not a forecast. How TownRatings reads climate data →
- Temperatures and precipitation: NOAA’s gridded 1991–2020 normals for the 5 km cell at Circle City’s center.
- Snow: Wittmann 1se, AZ.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Wittmann 1se, AZ, 4 miles from the town’s center, 190 ft lower; the nearest station that passes our checks for distance, height and agreement with the grid.
- Growing zone: USDA Plant Hardiness Zone Map, 2023. USDA Agricultural Research Service and PRISM Group, Oregon State University, prism.oregonstate.edu/phzm, accessed 8 Oct 2026.
- Then and now: NOAA’s gridded normals for 1901–2000 at the same cell.
- Storms and extremes: FEMA National Risk Index (expected annual losses to buildings).
Common questions about Circle City’s climate
What is the weather like in Circle City?
A typical July afternoon reaches 104°, a January night drops to 40°, and snow is almost unheard of. Milder January nights than 89% of U.S. towns; hotter July afternoons than all but 83 U.S. towns.
How cold does it get in Circle City in winter?
December nights average 39°. About 13 nights a year reach 32° or below. In the coldest December of the last 30 years the month averaged 49°.
How much snow does Circle City get?
About 0.0 inches in a normal winter at Wittmann 1se, AZ, so most winters see none.
How hot does it get in Circle City?
July, with a typical high of 104° and a low of 77°. About 157 days a year reach 90° and 92 reach 100° (Wittmann 1se, AZ).
When is the first and last frost in Circle City?
In half of years the last spring frost (32°) comes by February 5 and the first fall frost by December 11, about 306 frost-free days, at Wittmann 1se, AZ.
What growing zone is Circle City in?
Zone 9b on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 26°.
What is the best time of year to visit Circle City?
By one simple rule (highs of 62–84° and lows of 40° or more), February, March, April and November. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Circle City getting warmer?
Yes: 1991–2020 averaged 2.0° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 90% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Circle City.
Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000; USDA/PRISM 2023 hardiness zones; FEMA National Risk Index. Today’s forecast: National Weather Service.