Isla Vista climate — normals and trends
Isla Vista (United States) has a warm-summer mediterranean climate (Csb) under the Köppen-Geiger classification. Its mean annual temperature is 15.4 °C and it receives 396 mm of precipitation per year.
These figures are normals computed over 86 complete calendar years, from 1940 to 2025, using ERA5 reanalysis data from the Copernicus programme.
The warmest month is August (21.2 °C on average) and the coldest is January (10.5 °C). Rainfall peaks in February.
Isla Vista averages 0 frost days, 7 hot days (≥ 30 °C) and 35 rainy days per year.
Isla Vista has warmed by +1.4 °C between 1940 and 2025, or +0.17 °C per decade. This trend is statistically significant.
The hottest day of the period reached 36.9 °C (on 1 September 1955) and the coldest -3.5 °C (on 22 December 1990).
Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.
Climate normals · ERA5
Isla VistaCalifornia
- coords
- 34.41°, -119.86°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
15.4°C
Average daily high
20.0°C
Average daily low
11.3°C
Annual rainfall
396mm
Sunshine / day
11.3h
Mean relative humidity
59%
Average peak wind
14.0km/h
Seasonal range
10.7°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
7 d/yr
Rainy days (≥ 1 mm)
35 d/yr
Annual snowfall
6.3 cm
Average feels-like high
19.0 °C
Average feels-like low
9.0 °C
Average peak gust
34.6 km/h
Tropical nights (≥ 20 °C)
5 d/yr
Solar radiation
20.8 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.4 °C
since 1940
+0.2 °C per decade · r² = 0.43 · p = < 0.001
Trend fitted by linear regression (ordinary least squares) on annual means. A trend is shown only when it is statistically significant (p < 0.05).
A climograph overlays rainfall (bars) and temperature (line): the standard reading in climatology, where you can see at a glance whether the warm season is also the dry one.
Records for the period
Hottest day
36.9 °C
1 September 1955
Coldest day
-3.5 °C
22 December 1990
Wettest day
118 mm
10 January 1995
Windiest day
44.1 km/h
3 February 1998
Strongest gust
108.7 km/h
3 February 1998
Hottest feels-like
38.1 °C
6 July 1989
Coldest feels-like
-8.8 °C
22 December 1990
Snowiest day
8.9 cm
13 February 2001
Sunniest day
14.0 h
23 May 1940
Normals computed over complete calendar years 1940–2025.
A specific year
Pick a year and see how it compares to normal — warmer, drier or more extreme than usual?
Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 16.4 °C | +1.3 °C | 9 mm | -75 mm |
| Feb | 16.8 °C | +1.4 °C | 99 mm | +15 mm |
| Mar | 15.2 °C | -1.1 °C | 70 mm | -3 mm |
| Apr | 17.1 °C | -1.1 °C | 12 mm | -16 mm |
| May | 20.8 °C | +0.4 °C | 3 mm | -4 mm |
| Jun | 23.2 °C | 0.0 °C | 0 mm | -2 mm |
| Jul | 23.3 °C | -2.2 °C | 0 mm | -1 mm |
| Aug | 25.7 °C | 0.0 °C | 2 mm | +0 mm |
| Sep | 23.6 °C | -1.0 °C | 14 mm | +9 mm |
| Oct | 21.3 °C | -0.7 °C | 42 mm | +30 mm |
| Nov | 18.4 °C | 0.0 °C | 130 mm | +92 mm |
| Dec | 18.8 °C | +3.2 °C | 161 mm | +100 mm |
The year's extremes
What was the weather like that day?
Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.
Frequently asked questions
What is the climate of Isla Vista?
Isla Vista has a warm-summer mediterranean climate (Köppen Csb). Over 1940-2025, the average annual temperature is 15.4 °C and it receives 396 mm of precipitation per year.
What is the hottest day ever recorded in Isla Vista?
The hottest day measured in Isla Vista between 1940 and 2025 was 1 September 1955, reaching 36.9 °C.
What is the coldest day in Isla Vista?
The coldest day measured in Isla Vista between 1940 and 2025 was 22 December 1990, at -3.5 °C.
Does it snow in Isla Vista?
Yes. Isla Vista gets on average 6.3 cm of snow per year and has around 0 frost days.
Has the climate of Isla Vista warmed?
Yes: Isla Vista warmed by +1.4 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Isla Vista?
The wettest day measured in Isla Vista between 1940 and 2025 was 10 January 1995, with 118 mm of rain in 24 hours.
What was the windiest day in Isla Vista?
The windiest day measured in Isla Vista between 1940 and 2025 was 3 February 1998, with winds reaching 44.1 km/h.
What is the warmest month in Isla Vista?
The warmest month in Isla Vista is August (21.2 °C on average); the coldest is January (10.5 °C).
How much does it rain in Isla Vista?
Isla Vista receives on average 396 mm of precipitation per year, spread over about 35 rainy days.
Is it sunny in Isla Vista?
Isla Vista gets on average 11.3 hours of sunshine per day, roughly 4,125 hours per year over 1940-2025.
What is the biggest single-day snowfall in Isla Vista?
The heaviest 24-hour snowfall measured in Isla Vista between 1940 and 2025 was 13 February 2001, with 8.9 cm.
Are there tropical nights in Isla Vista?
Yes: Isla Vista has on average 5 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Isla Vista?
In Isla Vista, between 1940 and 2025, the highest apparent temperature reached 38.1 °C on 6 July 1989, and the lowest was -8.8 °C on 22 December 1990.
Compare Isla Vista with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Isla Vista