Santa Barbara records about 433mm of rain across roughly 32 wet days a year, which is a 9% chance on an average day. January is the wettest month at 82mm (19% of the annual total) and July the driest at 0mm. Local rain type: brief showers. Santa Barbara has near-perfect weather — the "American Riviera" lives up to its name with dry summers and mild, brief winter rain.
Chance of rain on an average day: 9%
Rainfall climatology for Santa Barbara. The live hour-by-hour answer for today loads at the top of this page from Open-Meteo and refreshes through the day — the figures below describe a typical year, not today.
Last updated: · Live forecast data refreshes hourly.
| Annual rainfall | 433mm |
| Rain days per year | 32 |
| Odds on an average day | 9% |
| Wettest month | January — 82mm over 7 days |
| Driest month | July — 0mm over 0 days |
| Rain type | brief showers |
| Best dry window | May through October offers virtually guaranteed dry conditions. |
| Worst rain window | January and February bring the only notable rain — still mild and brief. |
January delivers 8200% more rain than July (82mm vs 0mm). That gap is the difference between planning around showers and ignoring them.
No single month holds more than 19% of the annual total, so rain in Santa Barbara is spread through the year — there is no season you can rely on being dry.
Santa Barbara rain typically comes as discrete showers, so a compact umbrella and a flexible plan are usually enough.
Rain falls on about 7 days in January against 0 in July — the frequency swing matters more for planning than the millimetre totals.
Climate normals. Use them to judge whether today's live forecast at the top of the page is typical or unusual for the season.
| Month | Rainfall | Rain days | Chance on a given day | Highs |
|---|---|---|---|---|
| January | 82mm | 7 | 23% | 17°C |
| February | 72mm | 6 | 20% | 17°C |
| March | 58mm | 5 | 17% | 18°C |
| April | 22mm | 2 | 7% | 20°C |
| May | 5mm | 1 | 3% | 21°C |
| June | 1mm | 1 | 3% | 23°C |
| July | 0mm | 0 | 0% | 24°C |
| August | 1mm | 1 | 3% | 24°C |
| September | 3mm | 1 | 3% | 23°C |
| October | 10mm | 1 | 3% | 21°C |
| November | 32mm | 3 | 10% | 20°C |
| December | 72mm | 6 | 20% | 18°C |
Rain probability is the chance that at least 0.2mm falls at your location — not how long it rains. For Santa Barbara we combine the hourly probability curve, expected volume in millimetres, and the city's own rainfall record into a single umbrella verdict.
| Factor | Weight | What it measures |
|---|---|---|
| Hourly probability | 40% | Peak and sustained chance of measurable rain across the next 24 hours. |
| Expected volume | 30% | Total millimetres, which separates a passing shower from a genuine soaking. |
| Timing & duration | 20% | When rain starts, when it eases, and the longest continuous dry window. |
| Local rain type | 10% | Drizzle, brief showers, thunderstorms or monsoon — each needs different gear. |
Live hourly values come from Open-Meteo and refresh through the day. Monthly rainfall figures are climate normals, so they describe a typical year rather than a forecast.
Santa Barbara records rain on roughly 32 days a year — about a 9% chance on any given day — totalling around 433mm.
January, with about 82mm over 7 rain days. That is 19% of the entire year's rainfall in a single month.
July is the driest month at 0mm across roughly 0 days. May through October offers virtually guaranteed dry conditions.
Santa Barbara has near-perfect weather — the "American Riviera" lives up to its name with dry summers and mild, brief winter rain.
No. Probability is the chance that at least 0.2mm of rain falls at your location at some point in the period. Check the expected millimetres alongside it: 40% with 0.4mm is a passing shower, 40% with 12mm is a soaking.