Manning Cabin · Photo: National Park Service inventory · Public domainRincon Valley reaches 100° on about 64 days a year, more than all but 116 U.S. towns
A typical July afternoon reaches 98°, a January night drops to 36°, and snow is almost unheard of.
A year in Rincon Valley at a glance
Each month’s typical high and low, and what it brings.
What stands out about Rincon Valley’s climate
Compared with towns across the U.S., with Rincon Valley’s place in Arizona beside it.
What a year in Rincon Valley feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 326 frost-free days a year
In half of years the last 32° night comes by January 26 and the first by December 16. Frost and day counts come from NOAA’s station at Saguaro Np, AZ, 6 miles from the town’s center, at about the same height.
The 2023 USDA map puts Rincon Valley’s center in zone 9a: the coldest night of a typical winter, averaged over 1991–2020, reaches about 23°. 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 13 inches of rain a year
August is the wettest month and May the driest. Rain falls on about 48 days a year. Snow is rare: about 0.1" in a normal year at Vail 7 N, AZ, so most winters see none.
Rain + melted snow by month
Inches of water
Heating and cooling a home in Rincon Valley
30% of the work is heating, so air conditioning is the bigger bill. Months averaging under 55° run from December 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 Saguaro Np, AZ.
Living with Rincon Valley’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
326 frost-free days in zone 9a. The last frost comes by Jan 26 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 16.
Months with highs of 62–84° and lows of 40° or more: March, April and November. 33 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Rincon Valley from natural hazards, river flooding is the largest share (67%); heat waves, cold waves, winter storms and ice storms together are 19%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Rincon Valley and its neighbors
Tucson the hottest July afternoons (100°, 2° warmer). Differences under a degree are within what the 5 km grid can tell apart. Tap a town to see its climate.
Climates most like Rincon Valley’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 |
|---|---|---|---|---|
| Rincon Valley, AZ | 36° | 98° | 13" | 0.1" |
| Valle Vista, CA | 38° | 98° | 12" | 0.0" |
| Monahans, TX | 30° | 98° | 12" | 0.7" |
| Ivins, UT | 32° | 100° | 11" | 1.2" |
| Sunland Park, NM | 32° | 96° | 9" | 2.0" |
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 Rincon Valley averaged 1.4° warmer than the 1900s. The biggest change is in March (+2.4°).
A bigger shift than in 54% 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 Rincon Valley compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Rincon Valley’s place among Arizona’s.
Rincon Valley weather by month
Highs, lows and precipitation from NOAA’s grid at Rincon Valley’s center; snow, wet days and snow on the ground from Vail 7 N, AZ. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 66° | 36° | 1.1" | 0.1" | 4 | 0 | 46° – 56° |
| February | 68° | 38° | 1.1" | 0.0" | 4 | 0 | 47° – 58° |
| March | 74° | 43° | 0.8" | 0.0" | 4 | 0 | 52° – 63° |
| April | 81° | 48° | 0.3" | 0.0" | 2 | 0 | 59° – 69° |
| May | 90° | 55° | 0.2" | 0.0" | 1 | 0 | 67° – 77° |
| June | 99° | 65° | 0.3" | 0.0" | 2 | 0 | 77° – 85° |
| July | 98° | 71° | 2.5" | 0.0" | 9 | 0 | 81° – 87° |
| August | 96° | 70° | 2.7" | 0.0" | 9 | 0 | 81° – 88° |
| September | 93° | 64° | 1.5" | 0.0" | 4 | 0 | 75° – 81° |
| October | 85° | 53° | 0.7" | 0.0" | 3 | 0 | 65° – 73° |
| November | 74° | 42° | 0.7" | 0.0" | 3 | 0 | 50° – 65° |
| December | 64° | 36° | 1.3" | 0.0" | 4 | 0 | 46° – 54° |
| Year | 82° | 52° | 13.2" | 0.1" | 48 | 0 |
How much a month can swing
A normal is an average. November swings the most: from 1991 to 2020 its average ranged from 50° to 65°. July is the most reliable, staying within 6°.
Where Rincon Valley’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 Rincon Valley’s center.
- Snow: Vail 7 N, AZ.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Saguaro Np, AZ, 6 miles from the town’s center, at about the same height; 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 Rincon Valley’s climate
What is the weather like in Rincon Valley?
A typical July afternoon reaches 98°, a January night drops to 36°, and snow is almost unheard of. Milder January nights than 83% of U.S. towns; hotter July afternoons than 98% of U.S. towns.
How cold does it get in Rincon Valley in winter?
December nights average 36°. About 8 nights a year reach 32° or below. In the coldest December of the last 30 years the month averaged 46°.
How much snow does Rincon Valley get?
About 0.1 inches in a normal winter at Vail 7 N, AZ, so most winters see none.
How hot does it get in Rincon Valley?
July, with a typical high of 98° and a low of 71°. About 150 days a year reach 90° and 64 reach 100° (Saguaro Np, AZ).
When is the first and last frost in Rincon Valley?
In half of years the last spring frost (32°) comes by January 26 and the first fall frost by December 16, about 326 frost-free days, at Saguaro Np, AZ.
What growing zone is Rincon Valley in?
Zone 9a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 23°.
What is the best time of year to visit Rincon Valley?
By one simple rule (highs of 62–84° and lows of 40° or more), March, April and November. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Rincon Valley getting warmer?
Yes: 1991–2020 averaged 1.4° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 54% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Rincon Valley.
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.