September could be a good time to look at the income side of your portfolio.
But which ASX dividend shares could be worth considering this month?
Three shares that I think could be strong picks for passive income are listed below. Here's what you need to know about them:

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APA Group (ASX: APA)
APA Group could be an ASX dividend share to consider in September. It owns and operates a large portfolio of energy infrastructure assets across Australia.
This includes gas pipelines, processing assets, storage facilities, electricity transmission assets, and other infrastructure that helps move energy from where it is produced to where it is needed.
That gives APA Group a different profile to many other income shares. Its assets are tied to the movement of energy, which remains essential for households, businesses, and industry.
A large portion of APA Group's earnings is supported by long-term contracts and regulated assets. This can provide a level of income visibility that is attractive for dividend investors.
Energy markets are changing, but Australia will still need reliable infrastructure for a long time.
Based on current estimates, APA Group offers a FY 2027 dividend yield of approximately 5.4%.
Charter Hall Long WALE REIT (ASX: CLW)
A second ASX dividend share for income investors to look at is Charter Hall Long WALE REIT.
This real estate investment trust (REIT) owns a portfolio of properties leased to government, corporate, and major tenant customers.
As its name suggests, a key feature is its long weighted average lease expiry. That means many of its properties are leased for long periods, which can provide better visibility over future rental income.
The portfolio includes assets across areas such as government, social infrastructure, industrial, convenience retail, and other essential or mission-critical properties.
Charter Hall Long WALE REIT has not been immune to higher interest rates and property market pressure. But its long leases and quality tenant base remain attractive features for income investors.
For FY 2027, the market is expecting Charter Hall Long WALE REIT to offer a dividend yield of roughly 7.3%.
HomeCo Daily Needs REIT (ASX: HDN)
Finally, HomeCo Daily Needs REIT is an ASX dividend share to consider.
The property company owns convenience-focused assets across neighbourhood retail, large-format retail, health, and services.
These are properties linked to things people keep using. Its tenants include supermarkets, pharmacies, healthcare providers, pet stores, childcare operators, and other daily-needs businesses.
That does not make the REIT risk-free, but it does give its portfolio a practical defensive quality.
People may delay big purchases when household budgets are tight, but groceries, healthcare, medicines, and essential services remain part of everyday life.
This can help support rental income and dividends through different market conditions.
At current levels, HomeCo Daily Needs REIT is expected to offer a FY 2027 dividend yield of around 7.7%.