Boron’s winters are milder and less snowy than most of the U.S.
A typical July afternoon reaches 101°, a January night drops to 33°, and about 2 inches of snow falls in a normal winter.
A year in Boron at a glance
Each month’s typical high and low, and what it brings.
What stands out about Boron’s climate
Compared with towns across the U.S., with Boron’s place in California beside it.
What a year in Boron feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 251 frost-free days a year
In half of years the last 32° night comes by March 19 and the first by November 25. Frost dates and degree days from Randsburg, CA, 23 miles away.
The 2023 USDA map puts Boron’s center in zone 8b: the coldest night of a typical winter, averaged over 1991–2020, reaches about 16°. 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 Randsburg, CA, falls mostly in December. Precipitation (rain plus melted snow) adds up to 6 inches a year; February is the wettest month and June the driest. Rain or snow falls on about 24 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Boron
53% 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 Randsburg, CA.
Living with Boron’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
251 frost-free days in zone 8b. The last frost comes by Mar 19 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 25.
Months with highs of 62–84° and lows of 40° or more: March, April, May and October. 8.1 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Boron from natural hazards, river flooding is the largest share (69%); heat waves, cold waves, winter storms and ice storms together are 4%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Boron and similar climates
TownRatings has no climate map of the towns around Boron yet.
Climates most like Boron’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 |
|---|---|---|---|---|
| Boron, CA | 33° | 101° | 6" | 2.2" |
| Santa Clara, UT | 32° | 102° | 10" | 1.2" |
| Summerlin South, NV | 35° | 102° | 5" | 0.2" |
| Safford, AZ | 32° | 100° | 9" | 0.2" |
| Socorro, TX | 31° | 97° | 9" | 2.8" |
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 Boron averaged 2.0° warmer than the 1900s. The biggest change is in January (+2.8°).
A bigger shift than in 88% 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 Boron compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Boron’s place among California’s.
Boron weather by month
Highs, lows and precipitation from NOAA’s grid at Boron’s center; snow, wet days and snow on the ground from Randsburg, CA. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 59° | 33° | 1.3" | 0.4" | 4 | 0 | 42° – 53° |
| February | 63° | 37° | 1.6" | 0.3" | 5 | 0 | 42° – 58° |
| March | 69° | 41° | 0.9" | 0.6" | 4 | 0 | 48° – 62° |
| April | 75° | 46° | 0.3" | 0.0" | 2 | 0 | 54° – 65° |
| May | 84° | 54° | 0.1" | 0.0" | 1 | 0 | 59° – 77° |
| June | 94° | 63° | 0.0" | 0.0" | 0 | 0 | 72° – 84° |
| July | 101° | 69° | 0.1" | 0.0" | 1 | 0 | 80° – 88° |
| August | 100° | 67° | 0.1" | 0.0" | 1 | 0 | 80° – 87° |
| September | 93° | 60° | 0.1" | 0.0" | 1 | 0 | 72° – 80° |
| October | 81° | 49° | 0.3" | 0.0" | 1 | 0 | 61° – 71° |
| November | 68° | 39° | 0.4" | 0.1" | 2 | 0 | 44° – 60° |
| December | 57° | 32° | 0.9" | 0.8" | 3 | 0 | 40° – 50° |
| Year | 79° | 49° | 6.1" | 2.2" | 24 | 0 |
How much a month can swing
A normal is an average. May swings the most: from 1991 to 2020 its average ranged from 59° to 77°. August is the most reliable, staying within 6°.
Where Boron’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 Boron’s center.
- Snow: Randsburg, CA.
- Frost dates, heating and cooling: Randsburg, CA, 23 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 Boron’s climate
What is the weather like in Boron?
A typical July afternoon reaches 101°, a January night drops to 33°, and about 2 inches of snow falls in a normal winter. Milder January nights than 78% of U.S. towns; hotter July afternoons than all but 119 U.S. towns.
How cold does it get in Boron in winter?
December nights average 32°. About 33 nights a year reach 32° or below. In the coldest December of the last 30 years the month averaged 40°.
How much snow does Boron get?
About 2.2 inches in a normal winter at Randsburg, CA, most of it in December, with snow on the ground about 0 days a year.
How hot does it get in Boron?
July, with a typical high of 101° and a low of 69°. About 106 days a year reach 90° (Randsburg, CA).
When is the first and last frost in Boron?
In half of years the last spring frost (32°) comes by March 19 and the first fall frost by November 25, about 251 frost-free days, at Randsburg, CA.
What growing zone is Boron in?
Zone 8b on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 16°.
What is the best time of year to visit Boron?
By one simple rule (highs of 62–84° and lows of 40° or more), March, April, May and October. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Boron getting warmer?
Yes: 1991–2020 averaged 2.0° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 88% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Boron.
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.