Planning an Event in Chicago in May: What to Watch For

May is when Chicago's event season switches on. Graduation parties take over suburban backyards, couples start their wedding season, and parishes and schools fill every weekend. The weather is usually kind, but storms and cool evenings still happen. Here is what to watch for in May 2027.

The May 2027 calendar: dates that change your plans

Before you pick a date, check it against this list. Holidays decide who can come, and big city events decide how easy it is to get guests, vendors and delivery trucks to your venue.

May weather: what to watch out for

May is mild and green. NWS normals for O'Hare give May an average high of 70.5°F and a low of 50.6°F. Warm afternoons are common, but so are cool evenings and fast-moving storms.

What to plan for:

• Storms. Spring storms can arrive quickly. Choose a tent rated for wind, have a plan for moving guests, and keep an eye on the forecast the week of the event. Read tent wind ratings and weather safety.
• Cool evenings. A 50°F evening feels cold after a warm afternoon. Keep heaters or blankets available for anything after sunset.
• Long light. Sunset moves from about 7:47 pm on May 1 to about 8:14 pm by May 28, which is ideal for evening photos.
• Ground. Lawns are drier than in April but can still be soft after rain. Flooring helps under a dance area.

Venue demand and booking lead times in May

May is peak season for party rentals in the suburbs. Graduation parties cluster on the weekends after ceremonies, and they all want the same tents, tables and chairs. Our rule of thumb: book tents, specialty chairs and dance floors 2 to 4 months ahead for May Saturdays, and confirm your date the moment the school announces the ceremony.

Venues are busy too, with weddings, proms and communions. If you want a Saturday in May at a popular venue, it is often booked many months ahead, so consider a Friday or Sunday. For home parties, our graduation party tent guide and backyard wedding rental checklist cover the full list.

Rentals that matter most in May

These are the categories that do the most work for a May event in Chicagoland. Each link opens the live catalog with current prices.

• Tents: the most booked item in May for graduation and backyard parties.
• Tables: 6 and 8 foot banquet tables for buffets and seating.
• Chairs: garden folding or resin chairs that handle grass.
• Concessions: popcorn or snow cone machines for graduation parties.
• Restrooms & power: for larger home parties, check restroom and power needs.

You can add any of these to a plan in our event planner and instant quote, which totals the list for your guest count and shows the price before anyone calls you.

A May planning checklist

Where May events happen around Chicago

The calendar plays out differently by neighborhood and suburb. Our area guides cover parking, delivery access and local venues for Naperville, Wheaton, Arlington Heights and Orland Park. For event-specific planning, see graduation parties; spring weddings; backyard parties. For month-specific chair picks, read Chicago event chairs in May.

Related guides for this month: the month before: April, the month after: June, and the full month-by-month Chicago event calendar.

Plan your May event with us

Tell us your date, your venue and your guest count. We will flag anything on the May calendar that could affect your event, then build the full rental list: chairs, tables, linens, tents, heat or cooling and lighting. Start your plan and instant quote, or book a free 15-minute planning call.