Custom Merch for Nonprofits in Seattle, WA
Merch Mob makes fundraising tees and hoodies, volunteer shirts, and walk, run and ride shirts for nonprofits in Seattle, WA, at its shop in Montclair, CA, and ships them to Seattle. With a median age of 35.6, under the US 38.9 (Census ACS, 2020-2024), Seattle runs a little younger than the country, so a volunteer shirt with a design people would wear on a weekend does more than a plain logo.
Seattle by the numbers
Seattle has grown to 784,777 residents, up 6.5% since 2020 (Census estimates).
King County has 169 civic and social organizations with paid employees (Census County Business Patterns, 2023). That is 0.72 for every 10,000 residents, the same as the national figure of 0.72. 79% of them employ fewer than 10 people. The count is about where it was in 2018 (164).
That Census category covers clubs, fraternal lodges, alumni groups and similar associations; many charities are counted in other categories.
King County as a whole has 2,344,939 residents, up 3.3% since 2020. King County has one civic or social organization for every 13,880 residents.
- Population, 2025
- 784,777
- Since 2020
- +6.5%
- County
- King County
- Civic and social organizations in King County, 2023
- 169
- Per 10,000 county residents
- 0.72 (US 0.72)
- Time zone
- Pacific
- Median age
- 35.6 (US 38.9)
- 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 nonprofits
Seattle spends 7 months a year under a 65°F average high, so volunteers at outdoor events will often wear a hoodie over their shirt; print the volunteer mark on the hoodie too, or pick a bright fleece color. Summer walks and runs fit June to September, when highs average 70°F or more and peak at 77°F in August, so short-sleeve participant shirts work for those dates. Fall drives, winter volunteer shifts and spring cleanups all land in the cool months, so a well-made hoodie is the fundraising item supporters can wear most often; give it the strongest design in the lineup. About 30 nights a year fall to 32°F or below, so a volunteer crew that sets up before sunrise in winter should have a beanie and a layer over the event tee. Rain peaks in November at about 5.8 inches, so schedule outdoor fundraisers for a drier month or line up a rain date, and keep the boxes of event shirts under cover at check-in.
| Month in Seattle | Average high | Average low | Rain (in) | What volunteers and supporters wear |
|---|---|---|---|---|
| January | 49°F | 37°F | 5.2 | Volunteer hoodies and donor crewnecks |
| February | 51°F | 37°F | 3.7 | Volunteer hoodies and donor crewnecks |
| March | 55°F | 39°F | 3.9 | Volunteer hoodies and donor crewnecks |
| April | 60°F | 44°F | 2.9 | Volunteer hoodies and donor crewnecks |
| May | 67°F | 49°F | 2 | Long-sleeve race shirts |
| June | 71°F | 54°F | 1.2 | Walk tees and volunteer shirts |
| July | 77°F | 58°F | 0.6 | Walk tees and volunteer shirts |
| August | 77°F | 58°F | 0.8 | Walk tees and volunteer shirts |
| September | 72°F | 54°F | 1.4 | Walk tees and volunteer shirts |
| October | 61°F | 46°F | 3.5 | Volunteer hoodies and donor crewnecks |
| November | 53°F | 40°F | 5.8 | Volunteer hoodies and donor crewnecks |
| December | 48°F | 36°F | 5.5 | Volunteer hoodies and donor crewnecks |
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 participant shirt suits a charity walk or run in Seattle?
Long sleeves for most of the year, since highs average under 65°F from October to April; save short sleeves for a race in the warm stretch, June to September.
More for Seattle
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