Compton, United States — Weather in September 2026

Climate Overview

Compton, United States in September has hot conditions, with highs reaching 29.5°C (85°F) and afternoons the warmest part of the day. Rain is rare, falling on about 1 days this month. Temperatures drop noticeably between day and night. Sea temperature averages 20.9°C (70°F).

This month falls at the beginning of Autumn.

Daily highs in September gradually drop from around 32°C (89°F) at the start to 28°C (83°F) by month's end.

Rainfall is heaviest during the first third of the month, while the last third tends to be drier.

Expect around 11.6h of sunshine at the start of September, decreasing to 10.7h by the end.

The warmest days tend to fall around the 6th, averaging 32.6°C (91°F).

Temperatures begin dropping heading into October.

Monthly September Averages

Temperature

30°C / 18°C

Feels Like

31°C / 20°C

Rain

1 days · 5 mm

Sunshine

11.3h / day

Humidity

67% — Muggy

Wind

14 km/h

Wind Direction

SSW (213°)

Gusts

33 km/h

Daylight

12.4 h

Cloud Cover

29%

Clear Sky Days

UV Index

7 — High

Sea Temperature

21°C

Dew Point

17°C — Humid

Moon Phase

Waxing Crescent · 11%

Climate Charts

Daily averages based on historical data (2016–2025)

Daily Temperature

HighLow

Daily Precipitation

Rainfall

Daily Sunshine

Sunshine

Daily Wind Speed

Wind Speed

Sun Position

Sunrise 06:38

Daylight 12.4h

Sunset 19:01

What to Expect

Daytime temperatures around 30°C (85°F) are ideal for full-day outdoor exploration.

Rain is uncommon in this month, so most days stay dry from morning through evening.

1 of the last 5 yearly records were warmer than this month's long-run average.

Compare Months

2days (15 mm) Excellent

1days (7 mm) Excellent

1days (2 mm) Excellent

0days (1 mm) Excellent

1days (6 mm) Excellent

1days (5 mm) Excellent

2days (10 mm) Excellent

2days (29 mm) Excellent

Month	Temp	Feels Like	Rain	Sun	Humidity	UV	Status	Details
January	19°C / 7°C	17°C / 5°C	5days (81 mm) Good	8.1h Good	73% Muggy	3.7 Moderate	Good	View Details
February	20°C / 8°C	18°C / 6°C	5days (71 mm) Good	8.9h Good	68% Muggy	4.5 Moderate	Good	View Details
March	20°C / 10°C	19°C / 8°C	7days (72 mm) Good	10h Excellent	72% Muggy	6.2 High	Good	View Details
April	23°C / 12°C	22°C / 11°C	2days (15 mm) Excellent	11.5h Excellent	66% Muggy	7.4 Very High	Excellent	View Details
May best	24°C / 14°C	24°C / 13°C	1days (7 mm) Excellent	12.1h Excellent	68% Muggy	7.7 Very High	Excellent	View Details
June best	27°C / 16°C	28°C / 16°C	1days (2 mm) Excellent	13.1h Excellent	67% Muggy	8.3 Very High	Excellent	View Details
July best	30°C / 18°C	31°C / 19°C	0days (1 mm) Excellent	13.2h Excellent	66% Muggy	8.5 Very High	Excellent	View Details
August	30°C / 19°C	32°C / 21°C	1days (6 mm) Excellent	12.2h Excellent	66% Muggy	7.9 Very High	Excellent	View Details
September best	30°C / 18°C	31°C / 20°C	1days (5 mm) Excellent	11.3h Excellent	67% Muggy	7 High	Excellent	View Details
October best	27°C / 15°C	27°C / 15°C	2days (10 mm) Excellent	10.2h Excellent	64% Muggy	5.6 High	Excellent	View Details
November	23°C / 11°C	22°C / 9°C	2days (29 mm) Excellent	8.9h Good	63% Muggy	4.2 Moderate	Excellent	View Details
December	20°C / 8°C	18°C / 6°C	5days (66 mm) Good	7.8h Good	69% Muggy	3.4 Moderate	Good	View Details

What to Wear

Summer clothing like shorts, t-shirts, and sundresses will be comfortable. Bring a light cardigan for air-conditioned spaces.

Temperatures drop significantly at night, so pack layers you can add or remove throughout the day.

Packing List

Breathable clothingSunscreen (SPF 30+)Sun hatSunglassesSandals

Frequently Asked Questions

Expand all

Is September a good time to visit Compton?

September is typically excellent for visiting Compton, with average highs of 30°C (85°F) and around 1 rainy days. Compton, United States in September has hot conditions, with highs reaching 29.5°C (85°F) and afternoons the warmest par

Does it rain a lot in Compton in September?

Compton typically sees around 1 rainy days in September with 5 mm (0.2 in) of total rainfall. An umbrella should suffice.

Does it get cold at night in Compton in September?

Evenings in Compton during September are mild at 18°C (65°F). A light cardigan is usually enough.

What should I pack for Compton in September?

With highs of 30°C (85°F) and lows of 18°C (65°F) in September, we recommend: Breathable clothing, Sunscreen (SPF 30+), Sun hat, Sunglasses, Sandals. Comfortable walking shoes are essential.

Is September among the best months weather-wise in Compton?

Yes, September offers some of the best weather conditions in Compton with comfortable temperatures and lower chances of rain.

What is the UV index in Compton in September?

The average UV index in Compton during September is 7 (high). Wear sunscreen SPF 30+, a hat, and sunglasses. Limit direct sun exposure between 10 AM and 4 PM.

How many hours of daylight are there in Compton in September?

Compton gets approximately 12 hours of daylight per day in September, with around 11 hours of sunshine.

Does it snow in Compton in September?

Snow is uncommon in Compton during September based on 10-year climate averages.

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