Few U.S. towns have warmer summer afternoons than San Miguel
The depth of winter brings overnight lows near 35°. Its yearly precipitation falls short of 95% of U.S. towns. Warming shows here too: 1.4° more than in 1901–2000, led by March. Tender plants can go out after about March 21; in half of years the first frost comes by November 20.
A year in San Miguel at a glance
Each month’s typical high and low, and what it brings.
What stands out about San Miguel’s climate
Compared with towns across the U.S., with San Miguel’s place in Arizona beside it.
What a year in San Miguel feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 246 frost-free days a year
In half of years the last 32° night comes by March 21 and the first by November 20. Frost dates and degree days from Sasabe, AZ, 17 miles away.
The 2023 USDA map puts San Miguel’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 2 inches of snow a winter
Snow, measured at Sasabe 7 Nw, AZ, falls mostly in March. Precipitation (rain plus melted snow) adds up to 13 inches a year; August is the wettest month and May the driest. Rain or snow falls on about 39 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in San Miguel
49% 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 Sasabe, AZ.
Living with San Miguel’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
246 frost-free days in zone 9a. The last frost comes by Mar 21 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 20.
Months with highs of 62–84° and lows of 40° or more: March, April and November.
Parks & trails →Of the yearly building losses FEMA expects in San Miguel from natural hazards, river flooding is the largest share (67%); heat waves, cold waves, winter storms and ice storms together are 20%. Normals are averages; the hazards page covers the extremes.
Natural hazards →San Miguel and similar climates
TownRatings has no climate map of the towns around San Miguel yet.
Climates most like San Miguel’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 |
|---|---|---|---|---|
| San Miguel, AZ | 35° | 101° | 13" | 1.9" |
| Washington, UT | 32° | 102° | 11" | 1.2" |
| California City, CA | 35° | 100° | 7" | 2.2" |
| Summerlin South, NV | 35° | 102° | 5" | 0.2" |
| Monahans, TX | 30° | 98° | 12" | 0.7" |
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 San Miguel averaged 1.4° warmer than the 1900s. The biggest change is in March (+2.4°).
A bigger shift than in 56% 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 San Miguel compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with San Miguel’s place among Arizona’s.
San Miguel weather by month
Highs, lows and precipitation from NOAA’s grid at San Miguel’s center; snow, wet days and snow on the ground from Sasabe 7 Nw, AZ. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 69° | 35° | 0.9" | 0.5" | 3 | 0 | 46° – 57° |
| February | 71° | 37° | 0.9" | 0.4" | 4 | 0 | 49° – 60° |
| March | 77° | 41° | 0.7" | 0.7" | 3 | 0 | 53° – 65° |
| April | 84° | 46° | 0.3" | 0.1" | 1 | 0 | 59° – 70° |
| May | 92° | 53° | 0.1" | 0.0" | 1 | 0 | 66° – 77° |
| June | 102° | 62° | 0.2" | 0.0" | 1 | 0 | 76° – 85° |
| July | 101° | 70° | 2.4" | 0.0" | 7 | 0 | 83° – 88° |
| August | 100° | 68° | 3.1" | 0.0" | 9 | 0 | 81° – 89° |
| September | 96° | 63° | 1.4" | 0.0" | 4 | 0 | 75° – 82° |
| October | 88° | 51° | 0.6" | 0.0" | 2 | 0 | 66° – 74° |
| November | 77° | 41° | 0.8" | 0.1" | 2 | 0 | 51° – 66° |
| December | 68° | 34° | 1.3" | 0.1" | 3 | 0 | 46° – 56° |
| Year | 85° | 50° | 12.7" | 1.9" | 39 | 0 |
How much a month can swing
A normal is an average. November swings the most: from 1991 to 2020 its average ranged from 51° to 66°. July is the most reliable, staying within 5°.
Where San Miguel’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 San Miguel’s center.
- Snow: Sasabe 7 Nw, AZ.
- Frost dates, heating and cooling: Sasabe, AZ, 17 miles away.
- 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 San Miguel’s climate
What is the weather like in San Miguel?
A typical July afternoon reaches 101°, a January night drops to 35°, and about 2 inches of snow falls in a normal winter. Milder January nights than 80% of U.S. towns; hotter July afternoons than all but 111 U.S. towns.
How cold does it get in San Miguel in winter?
December nights average 34°. About 31 nights a year reach 32° or below. In the coldest December of the last 30 years the month averaged 46°.
How much snow does San Miguel get?
About 1.9 inches in a normal winter at Sasabe 7 Nw, AZ, most of it in March, with snow on the ground about 0 days a year.
How hot does it get in San Miguel?
July, with a typical high of 101° and a low of 70°. About 118 days a year reach 90° (Sasabe, AZ).
When is the first and last frost in San Miguel?
In half of years the last spring frost (32°) comes by March 21 and the first fall frost by November 20, about 246 frost-free days, at Sasabe, AZ.
What growing zone is San Miguel 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 San Miguel?
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 San Miguel getting warmer?
Yes: 1991–2020 averaged 1.4° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 56% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in San Miguel.
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.