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Santa Barbara in September: Weather, Average temperature and Climate

Planning a trip and want to know what the weather in Santa Barbara in September will be like? Take a look at our weather guide for Santa Barbara, based on historical data.
Check flight prices to Santa Barbara on Avionero:
September

Weather in Santa Barbara in September 2025

Great Weather
Warm
☀️
Sunny
September is an ideal time to visit Santa Barbara if you're seeking a destination with brilliant weather. Anticipate average maximum temperatures of +82°F and about 23 sunny days, ensuring you'll have ample opportunities to soak up the sunshine. It's worth noting, though, that there may be some rainfall, with approximately 5 mm of precipitation over an average of 3 rainy days. So, prepare your sunglasses, a beach towel, and great walking shoes, as it's most likely going to be amazing weather. Search flights in one click on Avionero.
Good to know:
  • September is usually the hottest month of the year in Santa Barbara;

Average weather

☀️
+82°F
Avg. max. temperature
+54°F
Min.
+117°F
Max.
5 mm
Total precipitation
60%
Avg. humidity
1 m/s
Avg. wind
23 ☀️
Sunny Days
4 ⛅️
Cloudy
3 🌦
Rainy
Our opinion: Santa Barbara has great weather in September.

Average temperature in Santa Barbara in September

Here are the expected maximum, average and minimum temperatures in Santa Barbara for September based on the historical data.
Last Year
Historical Data

Going from a maximum of +93°F during the day to a minimum of +57°F during the night, the temperature in September averages around +79°F.

The average maximum temperature goes down 10% by the end of the month, compared with the beginning of the month, from +77°F to +73°F.

Is Santa Barbara warm or cold in September?

Santa Barbara is typically warm in September.

Maximum temperatures go up compared to the previous month from +82°F to +82°F. The minimum temperature also goes down from +66°F to +64°F.

It’s generally warm, but pack a long-sleeve shirt for evenings.

September is the hottest month in Santa Barbara, here is the comparison with other months:

Climate in Santa Barbara in September

Santa Barbara weather looks like this, on average, in September and the surrounding months.
AugustSeptemberOctober
Avg. temperature
+82°F+82°F+77°F
Min. temperature
+57°F+54°F+50°F
Max. temperature
+100°F+117°F+102°F
Rainfall
2 mm5 mm15 mm
Wind
1 m/s1 m/s1 m/s
Humidity
60%60%58%
Air pressure
1011 HPa1011 HPa1013 HPa
Sunny days
252320
Cloudy days
347
Rainy days
334
Snowy days
000

September weather is still as great as in August. The temperature levels stay the same in the area of +82°F for average maximum temperature during the day. Prepare for more rain. Average rainfall goes from 2 mm to 5 mm. Humidity levels don’t change as the month goes on, averaging around 60%. The average wind speed doesn’t change much during September, staying around 1 m/s. The days becoming less sunny, going from 25 sunny days in August to 23 in September.

October brings much the same weather, it remains great.

Wind

Wind speed in Santa Barbara in September based on historical data.
Last Year
Historical Data

The average wind speed is 1 m/s getting up to 2 m/s which is a light breeze; barely moving the tree leaves.

The average wind speed in Santa Barbara is gradually increasing during September, going from 1 m/s to 1 m/s over the course of the month.

Rain

Amount of rainfall in mm during September in Santa Barbara based on historical data.
Last Year
Historical Data
Typically, there is a 13% chance of rain on an average day in September, with total rainfall of approximately 7 mm. The maximum amount of rainfall per day is around 3 mm, which is considered light rain. Santa Barbara is amazing in September with as little as 4 rainy days on average, so plan adventures in the great outdoors.
Here’s how September is compared with other months in the amount of precipitation, total mm:
Santa Barbara wettest month is February, where a typical day has a 32% chance of precipitation and 94 mm of rainfall per day. July, on the other hand, is the driest month with a mere 10% chance of precipitation and 2 mm of rainfall per day.

How was the weather last September in Santa Barbara?

This is the weather in Santa Barbara in September 2024:
1 September
☀️
+77°F
2 September
🌧️
+73°F
3 September
☁️
+78°F
4 September
☀️
+78°F
5 September
☀️
+77°F
6 September
☀️
+76°F
7 September
☀️
+81°F
8 September
☀️
+91°F
9 September
☀️
+91°F
10 September
☁️
+92°F
11 September
☀️
+87°F
12 September
☀️
+81°F
13 September
☀️
+76°F
14 September
☀️
+78°F
15 September
☀️
+77°F
16 September
☀️
+74°F
17 September
☀️
+75°F
18 September
☀️
+75°F
19 September
☀️
+76°F
20 September
☀️
+74°F
21 September
☁️
+73°F
22 September
☁️
+74°F
23 September
☁️
+76°F
24 September
☀️
+77°F
25 September
☀️
+77°F
26 September
☀️
+83°F
27 September
☀️
+83°F
28 September
☀️
+77°F
29 September
☀️
+73°F
30 September
☁️
+73°F
In September 2024 Santa Barbara had 23 sunny days, 6 cloudy days, and 1 rainy days. The average maximum temperature was +79°F, with an absolute maximum of +93°F and a minimum of +73°F. The average humidity was 71%, with a maximum of 97% and a minimum of 29%. The average wind speed was 1 m/s, with a maximum of 4 m/s and a minimum of 0 m/s.
Are you planning a trip in September?

Climate Change Over the Years

This is how Santa Barbara climate has changed over the last 43 years.

The climate in Santa Barbara in September has not changed that much over the last 43 years.

The average temperature was the lowest in 2010 (+70°F) and the highest in 2015 (+77°F). The driest year was 2013 with only 117 mm of rainfall, and the wettest year was 2023 with 1100 mm.

FAQ

Frequently asked questions about the weather in Santa Barbara in September:

Is September a good time to visit Santa Barbara?

Yes, September is a great time to go to Santa Barbara, the weather couldn’t be better. Be ready to get outside, explore and enjoy. Check what other months that are a good time to visit Santa Barbara.

Can you sunbathe in Santa Barbara in September?

September is warm in Santa Barbara. You may enjoy some beach or pool time in the day, but pack something a tad warmer for the evening.

Is Santa Barbara rainy in September?

Santa Barbara is usually dry in September. Plan your packing around outdoor activities and exploring.

Is it sunny in Santa Barbara in September?

Yes, Santa Barbara is sunny in September. Prepare for lots of rays. Don’t forget to pack your sunglasses and sunscreen, and maybe pick up a wide-brimmed hat when you arrive.

Other cities in USA

Check out the weather for other cities in USA.

Monthly weather in Santa Barbara

Source of the data

For this page, we’ve looked at the typical weather in Santa Barbara, based on historical hourly weather data from January 1, 1979, to December 31, 2023.

For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.