Pasadena Weather in September

In Pasadena, September brings very high daytime temperatures around 32°C (90°F), with nights cooling to 23°C (73°F). Expect quite a bit of rainfall this month.

Rainfall in Pasadena in September

On average, there are about 12 days with rain during this month, averaging 146 mm (5.7 in). When it rains this month, it tends to come down fairly heavily. Showers can be substantial even if they don't last all day.

Temperature in Pasadena in September

Daytime temperatures in Pasadena reach 32°C (90°F) in September, dropping to 23°C (73°F) at night. For most visitors, the main thing to prepare for is the heat during the day. Nights remain mild at 23°C (73°F), making evenings a pleasant time to be outdoors.

Sunshine in Pasadena in September

Expect a lot of sunshine this month, with about 235 hours of sun. These sunny conditions add to the overall experience.

Wind Speed in Pasadena in September

Wind speeds average 3 m/s (6 knots) during September. At this speed, light breezes keep leaves and small twigs in gentle motion while the wind also provides natural cooling. Since this is an average, some days are more tranquil while others have more persistent light winds that are more noticeable.

Should you favor a climate that's both dry and comfortably warm, March typically offers the most agreeable circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.

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For a detailed overview over the year and the best time to visit the United States of America, check out our Pasadena's climate page.

Pasadena Temperature in September

Min Temperature 23°C (73°F)  

Max Temperature 32°C (90°F)  

Chance of Rain 40%  

Precipitation 146 mm (5.7 in)  

Rainy days 12 days  

Humidity 77% *  

Windspeed 3 m/s (6 knots) *  

Sunshine 235 hours *  

Percentage Sunshine 64% *  

* Data from: Houston, the United States of America (16 KM, 10 Miles).

What to Wear in Pasadena in September

Warm but pleasant conditions in Pasadena in September. Focus on lightweight, maybe with natural fabrics, cotton blend shirts, comfortable shorts, and breathable footwear. A light cover-up for sun protection is smart too. Expect heavy rainfall, so bring good rain protection and waterproof bags. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.

What To Do in Pasadena in September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

9/10

Cycling

7/10

Walking

7/10

Camping

6/10

Outdoor sports

7/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit the United States of America, check out our Pasadena's climate page.

More climate data for Pasadena

Temperature Rainfall Sunshine Humidity Wind Speed

See the full Pasadena climate overview or explore weather in the United States of America.