St. David reaches 100° on about 34 days a year, more than 98% of U.S. towns
A typical July afternoon reaches 97°, a January night drops to 30°, and snow is almost unheard of.
A year in St. David at a glance
Each month’s typical high and low, and what it brings.
What stands out about St. David’s climate
Compared with towns across the U.S., with St. David’s place in Arizona beside it.
What a year in St. David feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 202 frost-free days a year
In half of years the last 32° night comes by April 12 and the first by November 1. Frost and day counts come from NOAA’s station at Benson 6se, AZ, 1.2 miles from the town’s center, at about the same height.
The 2023 USDA map puts St. David’s center in zone 8a: the coldest night of a typical winter, averaged over 1991–2020, reaches about 14°. 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
July is the wettest month and May the driest. Rain falls on about 53 days a year. Snow is rare: about 0.2" in a normal year at Benson 6se, AZ, so most winters see none.
Rain + melted snow by month
Inches of water
Heating and cooling a home in St. David
57% 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 Benson 6se, AZ.
Living with St. David’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
202 frost-free days in zone 8a. The last frost comes by Apr 12 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 1.
Months with highs of 62–84° and lows of 40° or more: April and October. 0.0 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in St. David from natural hazards, river flooding is the largest share (48%); heat waves, cold waves, winter storms and ice storms together are 18%. Normals are averages; the hazards page covers the extremes.
Natural hazards →St. David and similar climates
TownRatings has no climate map of the towns around St. David yet.
Climates most like St. David’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 |
|---|---|---|---|---|
| St. David, AZ | 30° | 97° | 13" | 0.2" |
| Monahans, TX | 30° | 98° | 12" | 0.7" |
| Anthony, NM | 31° | 96° | 9" | 0.0" |
| Lancaster, CA | 34° | 97° | 7" | 0.0" |
| Ivins, UT | 32° | 100° | 11" | 1.2" |
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 St. David averaged 1.6° warmer than the 1900s. The biggest change is in March (+2.5°).
A bigger shift than in 68% 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 St. David compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with St. David’s place among Arizona’s.
St. David weather by month
Highs, lows and precipitation from NOAA’s grid at St. David’s center; snow, wet days and snow on the ground from Benson 6se, AZ. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 64° | 30° | 0.9" | 0.2" | 4 | 0 | 43° – 51° |
| February | 67° | 32° | 0.7" | 0.0" | 4 | 0 | 45° – 55° |
| March | 73° | 38° | 0.6" | 0.0" | 3 | 0 | 51° – 61° |
| April | 81° | 43° | 0.2" | 0.0" | 2 | 0 | 56° – 67° |
| May | 89° | 50° | 0.2" | 0.0" | 2 | 0 | 65° – 74° |
| June | 98° | 59° | 0.3" | 0.0" | 2 | 0 | 73° – 82° |
| July | 97° | 66° | 3.1" | 0.0" | 10 | 0 | 79° – 84° |
| August | 94° | 65° | 2.9" | 0.0" | 11 | 0 | 77° – 86° |
| September | 92° | 59° | 1.7" | 0.0" | 5 | 0 | 71° – 78° |
| October | 83° | 47° | 0.6" | 0.0" | 3 | 0 | 62° – 69° |
| November | 73° | 36° | 0.5" | 0.0" | 3 | 0 | 47° – 62° |
| December | 64° | 29° | 0.8" | 0.0" | 4 | 0 | 42° – 51° |
| Year | 81° | 46° | 12.6" | 0.2" | 53 | 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 62°. July is the most reliable, staying within 6°.
Where St. David’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 St. David’s center.
- Snow: Benson 6se, AZ (NOAA station in town).
- Frost, freezing nights, 90° and 100° days, heating and cooling: Benson 6se, AZ, 1.2 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 St. David’s climate
What is the weather like in St. David?
A typical July afternoon reaches 97°, a January night drops to 30°, and snow is almost unheard of. Milder January nights than 72% of U.S. towns; hotter July afternoons than 97% of U.S. towns.
How cold does it get in St. David in winter?
December nights average 29°. About 93 nights a year reach 32° or below. In the coldest December of the last 30 years the month averaged 42°.
How much snow does St. David get?
About 0.2 inches in a normal winter at Benson 6se, AZ, so most winters see none.
How hot does it get in St. David?
July, with a typical high of 97° and a low of 66°. About 130 days a year reach 90° and 34 reach 100° (Benson 6se, AZ).
When is the first and last frost in St. David?
In half of years the last spring frost (32°) comes by April 12 and the first fall frost by November 1, about 202 frost-free days, at Benson 6se, AZ.
What growing zone is St. David in?
Zone 8a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 14°.
What is the best time of year to visit St. David?
By one simple rule (highs of 62–84° and lows of 40° or more), April and October. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is St. David getting warmer?
Yes: 1991–2020 averaged 1.6° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 68% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in St. David.
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.