Los Angeles, California — Southern California residents may need to prepare for a rainy Halloween as forecasters warn that an approaching storm could bring widespread showers and potentially heavy downpours across the region. The developing weather system could also disrupt trick-or-treating, outdoor parties and other Halloween weekend activities.

The National Weather Service in Los Angeles has warned that the chances of wet Halloween activities are increasing, with a 90% chance of rain somewhere in the region between Friday and November 2, according to the forecast information provided.

If rain reaches downtown Los Angeles on October 31, it could end a lengthy stretch of mostly dry Halloweens in the city. However, forecasters caution that the storm’s exact timing, location and intensity remain uncertain.

National Weather Service Warns of a Potentially Wet Halloween

Weather officials in Southern California are monitoring a storm system that could bring rain during one of the region’s busiest outdoor holiday weekends.

“Sadly, chances for wet Halloween activities are growing,” the National Weather Service in Los Angeles warned Wednesday.

Rich Thompson, a National Weather Service meteorologist in Oxnard, also described the potential for a rainy holiday weekend in comments to the Los Angeles Times.

“It looks like it will be a wet Halloween holiday weekend,” Thompson told the newspaper.

The forecast suggests that showers could develop at different times across the region, with steady to heavy downpours possible. Halloween night is among the periods that could be affected, although the latest projections may change as the storm approaches.

The weather service has also cautioned that the storm could bring a range of impacts, from moderate conditions to a less likely but more significant weather event.

“Halloween activities are likely to be impacted,” the agency said in its forecast discussion.

For families planning to take children trick-or-treating, the possibility of rain could mean adjusting outdoor plans, preparing rain-resistant costumes and keeping an eye on local forecasts.

Why This Halloween Could Be Different for Los Angeles

Los Angeles has experienced a long run of mostly dry Halloween evenings, making the current storm outlook particularly notable.

According to weather service records cited in the report, downtown Los Angeles last recorded rainfall on Halloween in 2014, when approximately a quarter-inch of rain fell.

Before that, the city had another wet Halloween in 2003, when about half an inch of rain was recorded. An earlier notable Halloween rainfall occurred in 1987, when the city received 1.39 inches.

The potential storm could interrupt the pattern of dry October 31 weather. However, rain across Southern California does not necessarily mean every neighborhood will experience precipitation during trick-or-treating hours.

The amount of rain could also vary significantly by location, depending on the storm’s movement and the timing of individual showers.

Thompson described the possibility of a wet holiday as unusual, saying, “It’s the first [Halloween] in a while that could actually be wet.”

Will Rain Affect Trick-or-Treating Across Southern California?

The biggest concern for families is whether showers will arrive during the hours when children are outdoors collecting candy.

Forecasters have indicated that Halloween activities could be affected, but the precise timing and location of the heaviest rainfall have not yet been established in the information provided.

Parents and caregivers should monitor updated forecasts for their specific communities rather than relying solely on regional predictions. Conditions in coastal Los Angeles, inland neighborhoods and surrounding communities may differ.

If rain develops during the evening, carrying umbrellas, using reflective accessories and choosing weather-appropriate footwear could help families prepare. Drivers should also use extra caution if wet roads reduce visibility or make stopping more difficult.

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People organizing outdoor Halloween events may want to review backup arrangements in case rain becomes more widespread or persistent.

The 90% regional rain probability does not mean every location has a 90% chance of rain throughout Halloween night. It refers to the possibility of rain somewhere across the forecast area during the stated period.

Coastal Flooding and High Tides Pose Another Concern

Before the potential Halloween storm arrives, Southern California is expected to experience relatively calm weather through Friday, according to the forecast information provided.

However, coastal communities face a separate concern this week: exceptionally high tides that could increase the risk of localized flooding and erosion.

The highest tides are expected Monday, Tuesday and Wednesday mornings, when water levels could rise several feet above normal high tides.

These conditions may affect beaches, low-lying coastal areas and exposed stretches of shoreline. Residents visiting the coast should pay attention to local advisories and avoid hazardous areas where waves or rising water threaten access.

The high-tide concern is separate from the developing Halloween storm, but both weather developments could affect outdoor plans across Southern California.

What Residents Should Watch Before Halloween

The forecast remains subject to change as meteorologists receive additional information about the storm’s path and strength.

Residents should watch for updated National Weather Service forecasts, particularly regarding the timing of rainfall, the possibility of heavy downpours and any advisories issued for their communities.

For now, a wet Halloween remains a possibility rather than a certainty for every part of the Los Angeles area. The next forecasts should help clarify whether rain is likely to arrive during peak trick-or-treating hours.

Are you planning to go trick-or-treating in Southern California this Halloween? Would rain change your plans, or will you head out regardless of the weather? Share your thoughts in the comments below.