Photo: No machine-readable author provided. Alanmak~commonswiki assumed (based on copyright claims). · CC BY-SA 3.0Isla Vista’s winters are milder and less snowy than most of the U.S.
A typical July afternoon reaches 72°, a January night drops to 45°, and snow is almost unheard of.
A year in Isla Vista at a glance
Each month’s typical high and low, and what it brings.
What stands out about Isla Vista’s climate
Compared with towns across the U.S., with Isla Vista’s place in California beside it.
What a year in Isla Vista feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
Frost is rare
Frost and day counts come from NOAA’s station at Santa Barbara 11 W, CA, 1.1 miles from the town’s center, at about the same height.
The 2023 USDA map puts Isla Vista’s center in zone 10a: the coldest night of a typical winter, averaged over 1991–2020, reaches about 32°. 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 18 inches of rain a year
February is the wettest month and July the driest. Rain falls on about 41 days a year. Snow is rare: about 0.0" in a normal year at Santa Barbara, CA, so most winters see none.
Rain + melted snow by month
Inches of water
Heating and cooling a home in Isla Vista
96% of the work is heating, so the furnace matters far more than the air conditioner. Months averaging under 55°: December and January.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at Santa Barbara 11 W, CA.
Living with Isla Vista’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
Zone 10a. Frost comes about 1 winter in 2, so tender plants can often stay out through winter.
Months with highs of 62–84° and lows of 40° or more: January, February, March, April, May, June, July, August, September, October, November and December. 3.7 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Isla Vista from natural hazards, earthquakes are the largest share (85%); heat waves, cold waves, winter storms and ice storms together are 1%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Isla Vista and its neighbors
Every town next door is within a degree of Isla Vista in January and July, closer than the 5 km grid can tell apart. Tap a town to see its climate.
Climates most like Isla Vista’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 |
|---|---|---|---|---|
| Isla Vista, CA | 45° | 72° | 18" | 0.0" |
| Makawao, HI | 53° | 75° | 23" | 0.0" |
| Sequim, WA | 34° | 71° | 18" | 1.4" |
| Cedar Mill, OR | 36° | 81° | 39" | 3.6" |
| Nantucket, MA | 26° | 76° | 44" | 25" |
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 Isla Vista averaged 2.7° warmer than the 1900s. The biggest change is in January (+3.4°).
A bigger shift than in all but 18 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 Isla Vista compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Isla Vista’s place among California’s.
Isla Vista weather by month
Highs, lows and precipitation from NOAA’s grid at Isla Vista’s center; snow, wet days and snow on the ground from Santa Barbara, CA. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 64° | 45° | 4.2" | 0.0" | 7 | 0 | 51° – 59° |
| February | 64° | 47° | 4.4" | 0.0" | 7 | 0 | 50° – 61° |
| March | 64° | 49° | 3.3" | 0.0" | 7 | 0 | 51° – 62° |
| April | 66° | 50° | 1.0" | 0.0" | 3 | 0 | 54° – 62° |
| May | 67° | 53° | 0.4" | 0.0" | 2 | 0 | 57° – 65° |
| June | 69° | 56° | 0.1" | 0.0" | 2 | 0 | 59° – 65° |
| July | 72° | 58° | 0.0" | 0.0" | 0 | 0 | 62° – 70° |
| August | 73° | 58° | 0.0" | 0.0" | 0 | 0 | 62° – 69° |
| September | 73° | 58° | 0.1" | 0.0" | 1 | 0 | 62° – 71° |
| October | 72° | 54° | 0.7" | 0.0" | 2 | 0 | 59° – 70° |
| November | 68° | 49° | 1.3" | 0.0" | 3 | 0 | 53° – 63° |
| December | 64° | 45° | 3.0" | 0.0" | 6 | 0 | 52° – 57° |
| Year | 68° | 52° | 18.4" | 0.0" | 41 | 0 |
How much a month can swing
A normal is an average. October swings the most: from 1991 to 2020 its average ranged from 59° to 70°. December is the most reliable, staying within 5°.
Where Isla Vista’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 Isla Vista’s center.
- Snow: Santa Barbara, CA.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Santa Barbara 11 W, CA, 1.1 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 Isla Vista’s climate
What is the weather like in Isla Vista?
A typical July afternoon reaches 72°, a January night drops to 45°, and snow is almost unheard of. Milder January nights than 94% of U.S. towns; cooler July afternoons than all but 103 U.S. towns.
How cold does it get in Isla Vista in winter?
December nights average 45°. About 1 nights a year reach 32° or below. In the coldest December of the last 30 years the month averaged 52°.
How much snow does Isla Vista get?
About 0.0 inches in a normal winter at Santa Barbara, CA, so most winters see none.
How hot does it get in Isla Vista?
July, with a typical high of 72° and a low of 58°. About 1 days a year reach 90° (Santa Barbara 11 W, CA).
When is the first and last frost in Isla Vista?
Most years have no frost at all: a 32° night comes in about 46% of winters at Santa Barbara 11 W, CA, usually in December or January.
What growing zone is Isla Vista in?
Zone 10a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 32°.
What is the best time of year to visit Isla Vista?
By one simple rule (highs of 62–84° and lows of 40° or more), January, February, March, April, May, June, July, August, September, October, November and December. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Isla Vista getting warmer?
Yes: 1991–2020 averaged 2.7° warmer than 1901–2000 on NOAA’s grid. A bigger shift than all but 18 U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Isla Vista.
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.