Photo: Unknown. 19th Century Photo (1880). More than 120 years since its creation in 1880. · Public domainPinal reaches 100° on about 31 days a year, more than 98% of U.S. towns
In January the night’s low is typically 34°. By precipitation alone, it ranks drier than 93% of U.S. towns. Decade by decade the climate has edged up, 1.8° above 1901–2000. Central heating does most of its work from December to February, in months below 50° on average.
A year in Pinal at a glance
Each month’s typical high and low, and what it brings.
What stands out about Pinal’s climate
Compared with towns across the U.S., with Pinal’s place in Arizona beside it.
What a year in Pinal feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 253 frost-free days a year
In half of years the last 32° night comes by March 11 and the first by November 21. Frost and day counts come from NOAA’s station at Globe #3, AZ, 2.3 miles from the town’s center, 100 ft lower.
The 2023 USDA map puts Pinal’s center in zone 9a: the coldest night of a typical winter, averaged over 1991–2020, reaches about 22°. 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 15 inches of rain a year
August is the wettest month and June the driest. Rain falls on about 51 days a year. Snow is rare: about 0.0" in a normal year at Miami, AZ, so most winters see none.
Rain + melted snow by month
Inches of water
Heating and cooling a home in Pinal
55% of the work is heating. Months averaging under 55° run from November through February.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at Globe #3, AZ.
Living with Pinal’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
253 frost-free days in zone 9a. The last frost comes by Mar 11 in half of years, so many gardeners wait a week or two past that to set out tomatoes. The first fall frost comes by Nov 21.
Months with highs of 62–84° and lows of 40° or more: March, April and October.
Parks & trails →Of the yearly building losses FEMA expects in Pinal from natural hazards, river flooding is the largest share (57%); heat waves, cold waves, winter storms and ice storms together are 4%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Pinal and its neighbors
Every town next door is within a degree of Pinal in January and July, closer than the 5 km grid can tell apart. Tap a town to see its climate.
Climates most like Pinal’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 |
|---|---|---|---|---|
| Pinal, AZ | 34° | 98° | 15" | 0.0" |
| Valle Vista, CA | 38° | 98° | 12" | 0.0" |
| Monahans, TX | 30° | 98° | 12" | 0.7" |
| Ivins, UT | 32° | 100° | 11" | 1.2" |
| Anthony, NM | 31° | 96° | 9" | 0.0" |
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value. Snow and frost-free days come from the nearest weather station, so neighbors often share them.
Warmer than it used to be
The last 30 years in Pinal averaged 1.8° warmer than the 1900s. The biggest change is in March (+2.8°).
A bigger shift than in 82% 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 Pinal compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Pinal’s place among Arizona’s.
Pinal weather by month
Highs, lows and precipitation from NOAA’s grid at Pinal’s center; snow, wet days and snow on the ground from Miami, AZ. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 60° | 34° | 1.9" | 0.0" | 5 | 0 | 42° – 52° |
| February | 63° | 36° | 1.9" | 0.0" | 5 | 0 | 44° – 55° |
| March | 69° | 41° | 1.3" | 0.0" | 4 | 0 | 48° – 61° |
| April | 77° | 46° | 0.4" | 0.0" | 3 | 0 | 55° – 67° |
| May | 86° | 53° | 0.4" | 0.0" | 2 | 0 | 63° – 75° |
| June | 96° | 62° | 0.2" | 0.0" | 2 | 0 | 73° – 83° |
| July | 98° | 69° | 2.2" | 0.0" | 7 | 0 | 80° – 86° |
| August | 96° | 68° | 2.3" | 0.0" | 9 | 0 | 79° – 86° |
| September | 91° | 61° | 1.2" | 0.0" | 4 | 0 | 72° – 79° |
| October | 81° | 50° | 1.1" | 0.0" | 4 | 0 | 62° – 71° |
| November | 68° | 40° | 1.0" | 0.0" | 3 | 0 | 47° – 61° |
| December | 58° | 33° | 1.6" | 0.0" | 5 | 0 | 42° – 50° |
| Year | 79° | 49° | 15.4" | 0.0" | 51 | 0 |
How much a month can swing
A normal is an average. November swings the most: from 1991 to 2020 its average ranged from 47° to 61°. July is the most reliable, staying within 6°.
Where Pinal’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 Pinal’s center.
- Snow: Miami, AZ.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Globe #3, AZ, 2.3 miles from the town’s center, 100 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 Pinal’s climate
What is the weather like in Pinal?
A typical July afternoon reaches 98°, a January night drops to 34°, and snow is almost unheard of. Milder January nights than 78% of U.S. towns; hotter July afternoons than 98% of U.S. towns.
How cold does it get in Pinal in winter?
December nights average 33°. About 40 nights a year reach 32° or below. In the coldest December of the last 30 years the month averaged 42°.
How much snow does Pinal get?
About 0.0 inches in a normal winter at Miami, AZ, so most winters see none.
How hot does it get in Pinal?
July, with a typical high of 98° and a low of 69°. About 114 days a year reach 90° and 31 reach 100° (Globe #3, AZ).
When is the first and last frost in Pinal?
In half of years the last spring frost (32°) comes by March 11 and the first fall frost by November 21, about 253 frost-free days, at Globe #3, AZ.
What growing zone is Pinal in?
Zone 9a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 22°.
What is the best time of year to visit Pinal?
By one simple rule (highs of 62–84° and lows of 40° or more), March, April and October. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Pinal getting warmer?
Yes: 1991–2020 averaged 1.8° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 82% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Pinal.
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.