Custom Merch for Events in Seattle, WA
Merch Mob makes attendee and souvenir tees, staff, crew and security shirts, and volunteer shirts for events in Seattle, WA, at its shop in Montclair, CA, and ships them to Seattle. Seattle is young: 35% of residents are aged 18 to 34, well above the US rate of 23% (Census ACS, 2020-2024), so attendee merch should look like streetwear, with oversized fits, the poster art large and the date small.
Seattle by the numbers
Seattle has grown to 784,777 residents, up 6.5% since 2020 (Census estimates).
King County has 87 event promoters (performing arts, sports and similar events) with paid employees (Census County Business Patterns, 2023). That is 0.37 for every 10,000 residents, above the national figure of 0.27. 76% of them employ fewer than 10 people. The count is about where it was in 2018 (85).
That counts promoters with a payroll; one-off events run by volunteers or venues are not in it.
King County as a whole has 2,344,939 residents, up 3.3% since 2020. King County has one event promoter for every 26,950 residents.
- Population, 2025
- 784,777
- Since 2020
- +6.5%
- County
- King County
- Event promoters (performing arts, sports and similar events) in King County, 2023
- 87
- Per 10,000 county residents
- 0.37 (US 0.27)
- Time zone
- Pacific
- Median age
- 35.6 (US 38.9)
- Residents aged 18 to 34
- 35% (US 23%)
- Warmest month, average high
- August, 77°F
- Coldest month, average low
- December, 36°F
- Days at 90°F or hotter, a year
- 3
- Nights at 32°F or colder, a year
- 30
- Rain, a year
- 36 in
- USPS zone from the shop
- 5
Weather: Seattle Boeing Field station, 5 mi from Seattle's center (NOAA 1991-2020 Climate Normals). People: Census ACS 2020-2024. Counts: CBP 2023, by county, paid-employee establishments. Population: Census, July 2025.
What Seattle's weather means for events
Cool weather fills 7 months of the Seattle calendar (average highs under 65°F), and even August peaks at an average high of 77°F, so staff need a warm layer for early and late shifts at most outdoor events. Hold tee-heavy outdoor events in the warm window (June to September, with average highs of 70°F or more), and keep staff in long sleeves for the rest of the year. With about 36 inches of rain a year, staff shirts often end up under rain jackets, so a bright printed cap or beanie keeps the team easy to spot in a wet crowd. Around 30 nights a year fall to 32°F or below, so an early-morning race or a late show in the cool months calls for warm staff layers and hoodies within reach at the booth. November brings the year's heaviest rain, about 5.8 inches, so an outdoor date that month needs tents on standby and a backup day.
| Month in Seattle | Average high | Average low | Rain (in) | What staff and the booth need |
|---|---|---|---|---|
| January | 49°F | 37°F | 5.2 | Booth hoodies and staff long sleeves |
| February | 51°F | 37°F | 3.7 | Booth hoodies and staff long sleeves |
| March | 55°F | 39°F | 3.9 | Booth hoodies and staff long sleeves |
| April | 60°F | 44°F | 2.9 | Booth hoodies and staff long sleeves |
| May | 67°F | 49°F | 2 | Tees, plus long sleeves for nights |
| June | 71°F | 54°F | 1.2 | Attendee tees and bright staff shirts |
| July | 77°F | 58°F | 0.6 | Attendee tees and bright staff shirts |
| August | 77°F | 58°F | 0.8 | Attendee tees and bright staff shirts |
| September | 72°F | 54°F | 1.4 | Attendee tees and bright staff shirts |
| October | 61°F | 46°F | 3.5 | Booth hoodies and staff long sleeves |
| November | 53°F | 40°F | 5.8 | Booth hoodies and staff long sleeves |
| December | 48°F | 36°F | 5.5 | Booth hoodies and staff long sleeves |
Made in So Cal, shipped to Seattle.
Orders ship to Seattle from the shop; there is no office or pickup point in Washington.
Seattle is about 967 miles from Merch Mob's shop in Montclair, CA, a straight-line distance. From the shop's ZIP code, Seattle is USPS zone 5. Seattle shares the shop's Pacific time zone.
From the production floor
Merch Mob production in Southern California.
Ordering from Seattle
Which months need hoodies at an outdoor event in Seattle?
Most of the year: average highs in Seattle stay under 65°F from October to April, so plan hoodies for staff and the booth then, and add them to summer events that run past sunset.
More for Seattle
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