September is an ideal time to visit Oakland if you're seeking a destination with brilliant weather. Anticipate average maximum temperatures of +75°F and about 11 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 6 mm of precipitation over an average of 2 rainy days. So, prepare your sunglasses, a beach towel, and great walking shoes, as it's most likely going to be amazing weather. Search flightsin one click on Avionero.
Good to know:
September is usually the hottest month of the year in Oakland;
Average weather
☀️
+75°F
Avg. max. temperature
+46°F
Min.
+106°F
Max.
6 mm
Total precipitation
73%
Avg. humidity
2 m/s
Avg. wind
11 ☀️
Sunny Days
17 ⛅️
Cloudy
2 🌦
Rainy
Our opinion: Oakland has great weather in September.
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Average temperature in Oakland in September
Here are the expected maximum, average and minimum temperatures in Oakland for September based on the historical data.
Last Year
Historical Data
Going from a maximum of +77°F during the day to a minimum of +55°F during the night, the temperature in September averages around +72°F.
The average maximum temperature goes down 8% by the end of the month, compared with the beginning of the month, from +68°F to +66°F.
Is Oakland warm or cold in September?
Oakland is typically warm in September.
Maximum temperatures go up compared to the previous month from +75°F to +75°F. The minimum temperature also goes up from +57°F to +57°F.
It’s generally warm, but pack a long-sleeve shirt for evenings.
September is the hottest month in Oakland, here is the comparison with other months:
Climate in Oakland in September
Oakland weather looks like this, on average, in September and the surrounding months.
August
September
October
Avg. temperature
+75°F
+75°F
+72°F
Min. temperature
+50°F
+46°F
+45°F
Max. temperature
+95°F
+106°F
+97°F
Rainfall
3 mm
6 mm
27 mm
Wind
2 m/s
2 m/s
1 m/s
Humidity
75%
73%
72%
Air pressure
1013 HPa
1012 HPa
1015 HPa
Sunny days
8
11
11
Cloudy days
23
17
15
Rainy days
1
2
5
Snowy days
0
0
0
September often has better weather than August.The temperature levels stay the same in the area of +75°F for average maximum temperature during the day.Prepare for more rain. Average rainfall goes from 3 mm to 6 mm.It feels drier, as humidity decreases from 75% to 73%.The average wind speed doesn’t change much during September, staying around 2 m/s.The good news is there are likely to be more sunny days in September, from 8 to 11.
Next month (October) brings a further decline in the weather.
Wind speed in Oakland in September based on historical data.
Last Year
Historical Data
The average wind speed is 2 m/s getting up to 4 m/s which is a light breeze; barely moving the tree leaves.
The average wind speed in Oakland is gradually decreasing during September, going from 4 m/s to 3 m/s over the course of the month.
Rain
Amount of rainfall in mm during September in Oakland based on historical data.
Last Year
Historical Data
Typically, there is a 7% chance of rain on an average day in September, with total rainfall of approximately 4 mm. The maximum amount of rainfall per day is around 2 mm, which is considered light rain.Oakland is amazing in September with as little as 2 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:
Oakland wettest month is January, where a typical day has a 42% chance of precipitation and 108 mm of rainfall per day. July, on the other hand, is the driest month with a mere 3% chance of precipitation and 1 mm of rainfall per day.
How was the weather last September in Oakland?
This is the weather in Oakland in September 2025:
1 September
☁️
+68°F
2 September
☁️
+72°F
3 September
☁️
+71°F
4 September
☁️
+70°F
5 September
☀️
+73°F
6 September
☀️
+70°F
7 September
☀️
+69°F
8 September
☀️
+75°F
9 September
☀️
+75°F
10 September
☀️
+73°F
11 September
☀️
+76°F
12 September
☁️
+72°F
13 September
☀️
+71°F
14 September
☀️
+70°F
15 September
☁️
+69°F
16 September
☁️
+69°F
17 September
☁️
+70°F
18 September
☀️
+71°F
19 September
☀️
+69°F
20 September
☀️
+69°F
21 September
☀️
+70°F
22 September
☀️
+68°F
23 September
☀️
+68°F
24 September
☁️
+69°F
25 September
☁️
+74°F
26 September
☀️
+74°F
27 September
☀️
+77°F
28 September
☀️
+74°F
29 September
☀️
+72°F
30 September
☁️
+66°F
In September 2025 Oakland had 19 sunny days, 11 cloudy days, and 0 rainy days. The average maximum temperature was +72°F, with an absolute maximum of +77°F and a minimum of +66°F. The average humidity was 75%, with a maximum of 90% and a minimum of 45%. The average wind speed was 2 m/s, with a maximum of 6 m/s and a minimum of 0 m/s.
Are you planning a trip in September?
Climate Change Over the Years
This is how Oakland climate has changed over the last 43 years.
The climate in Oakland in September has not changed that much over the last 43 years.
The average temperature was the lowest in 2010 (+65°F) and the highest in 2014 (+71°F). The driest year was 2013 with only 147 mm of rainfall, and the wettest year was 2023 with 1373 mm.
FAQ
Frequently asked questions about the weather in Oakland in September:
Is September a good time to visit Oakland?
Yes, September is a great time to go to Oakland, 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 Oakland.
Can you sunbathe in Oakland in September?
September is warm in Oakland. You may enjoy some beach or pool time in the day, but pack something a tad warmer for the evening.
Is Oakland rainy in September?
Oakland is usually dry in September. Plan your packing around outdoor activities and exploring.
Is it sunny in Oakland in September?
The amount of sunny days in Oakland during September varies; prepare for a mix of clouds and sun.
For this page, we’ve looked at the typical weather in Oakland, 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.
