Climate averages 1991–2020
Santa Barbara weather
in March.
A mild, moderately wet month: the 9th warmest and the 10th driest of the year. Meets the pleasant-weather rule
Long-term climate patterns, not a forecast for a particular trip.
March is a mild month in Santa Barbara: daytime highs average 20.6°C and nights cool to about 10.3°C. By daytime temperature it is the 9th warmest of the 12 months.
Expect about 70 mm of rain on roughly 6 days, which makes March a moderately wet month (the 10th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 57 min on an average March day.
The nearest other city in this atlas is Ventura (40 km away). In March its highs average 18.3°C, 2.3°C cooler than Santa Barbara, with 67 mm of rain.
Among the 498 cities listed in the United States, Santa Barbara ranks joint 90th of 498 for the warmest March highs and joint 222nd of 498 for the driest March (rainfall, lowest first). The mean March high of those 498 cities is 14.9°C; Santa Barbara is 5.6°C warmer than that mean.
From March to April, average highs rise by 2.2°C to 22.7°C, and monthly rainfall falls from 70 mm to 24 mm.
The annual picture
March in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Santa Barbara climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 19.1°C9.2°C | 9.2°C | 93 | 6.2 | 10.110 h |
| February | 19.0°C9.3°C | 9.3°C | 94 | 6.7 | 10.911 h |
| March, selected | 20.6°C10.3°C | 10.3°C | 70 | 5.8 | 11.912 h |
| April | 22.7°C11.8°C | 11.8°C | 24 | 3.0 | 13.013 h |
| May | 25.1°C14.3°C | 14.3°C | 10 | 1.8 | 13.914 h |
| June | 27.9°C17.0°C | 17.0°C | 2.0 | 0.5 | 14.414 h |
| July | 30.0°C19.9°C | 19.9°C | 2.7 | 0.7 | 14.214 h |
| August | 30.7°C20.4°C | 20.4°C | 0.8 | 0.2 | 13.413 h |
| September | 29.6°C18.8°C | 18.8°C | 2.3 | 0.5 | 12.412 h |
| October | 26.4°C15.5°C | 15.5°C | 18 | 1.9 | 11.311 h |
| November | 22.4°C11.9°C | 11.9°C | 26 | 3.0 | 10.410 h |
| December | 18.9°C9.1°C | 9.1°C | 61 | 5.1 | 9.910 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
March in nearby cities
- Ventura in MarchUnited States · 40 kmHigh 18.3°C · Low 8.8°C · 67 mm rain
- Oxnard in MarchUnited States · 54 kmHigh 17.3°C · Low 9.9°C · 67 mm rain
- Thousand Oaks in MarchUnited States · 84 kmHigh 18.9°C · Low 8.3°C · 66 mm rain
- Simi Valley in MarchUnited States · 86 kmHigh 19.5°C · Low 7.9°C · 66 mm rain
- Santa Maria, United States in MarchUnited States · 90 kmHigh 18.4°C · Low 8.6°C · 72 mm rain
- Valencia, United States in MarchUnited States · 100 kmHigh 20.1°C · Low 7.3°C · 56 mm rain
- Santa Clarita in MarchUnited States · 106 kmHigh 19.7°C · Low 7.2°C · 56 mm rain
- Bakersfield in MarchUnited States · 123 kmHigh 19.3°C · Low 7.7°C · 48 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Santa Barbara) is explained once on the Santa Barbara year overview and on the Sources, method and limits page.