Custom Merch for Nonprofits in San Diego, CA
Merch Mob makes fundraising tees and hoodies, volunteer shirts, and walk, run and ride shirts for nonprofits in San Diego, CA, at its shop in Montclair, CA, and ships them to San Diego. With a median age of 36.2, under the US 38.9 (Census ACS, 2020-2024), San Diego 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.
San Diego by the numbers
San Diego has 1,406,106 residents, up 1.6% since 2020 (Census estimates).
San Diego County has 194 civic and social organizations with paid employees (Census County Business Patterns, 2023). That is 0.59 for every 10,000 residents, below the national figure of 0.72. 81% of them employ fewer than 10 people. The count is up 10% from 177 in 2018.
That Census category covers clubs, fraternal lodges, alumni groups and similar associations; many charities are counted in other categories.
San Diego County as a whole has 3,282,248 residents, about the same as in 2020. San Diego County has one civic or social organization for every 16,920 residents.
- Population, 2025
- 1,406,106
- Since 2020
- +1.6%
- County
- San Diego County
- Civic and social organizations in San Diego County, 2023
- 194
- Per 10,000 county residents
- 0.59 (US 0.72)
- Time zone
- Pacific
- Median age
- 36.2 (US 38.9)
- Warmest month, average high
- August, 82°F
- Coldest month, average low
- December, 45°F
- Days at 90°F or hotter, a year
- 16
- Nights at 32°F or colder, a year
- 0
- Rain, a year
- 11 in
- USPS zone from the shop
- 2
Weather: San Diego Montgomery Field station, 1 mi from San Diego'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 San Diego's weather means for nonprofits
Heat is occasional rather than constant, with roughly 16 days a year at 90°F or more, so a moisture-wicking shirt is worth it for a summer race, and cotton works for the rest of the calendar. Nights still cool to an average low of 45°F in December, so a hoodie or quarter-zip works as a year-end donor gift and as a layer for volunteers at an evening event. Short-sleeve weather lasts 8 months, April to November, so most race dates can go out in tees, and a date outside that stretch is the time to offer long sleeves. About 11 inches of rain a year means an outdoor event here rarely needs a backup date, so put the budget into a bright volunteer shirt that photographs well in strong sun.
| Month in San Diego | Average high | Average low | Rain (in) | What volunteers and supporters wear |
|---|---|---|---|---|
| January | 67°F | 46°F | 2.3 | Long-sleeve race shirts |
| February | 67°F | 47°F | 2.7 | Long-sleeve race shirts |
| March | 69°F | 50°F | 1.6 | Long-sleeve race shirts |
| April | 71°F | 52°F | 0.8 | Walk tees and volunteer shirts |
| May | 72°F | 57°F | 0.3 | Walk tees and volunteer shirts |
| June | 75°F | 60°F | 0.1 | Walk tees and volunteer shirts |
| July | 80°F | 64°F | 0.1 | Walk tees and volunteer shirts |
| August | 82°F | 65°F | 0 | Walk tees and volunteer shirts |
| September | 81°F | 64°F | 0.2 | Walk tees and volunteer shirts |
| October | 78°F | 58°F | 0.5 | Walk tees and volunteer shirts |
| November | 73°F | 50°F | 0.9 | Walk tees and volunteer shirts |
| December | 67°F | 45°F | 1.6 | Long-sleeve race shirts |
Made in So Cal, shipped to San Diego.
San Diego shares the shop's Southern California region; orders ship from there.
San Diego is about 91 miles from Merch Mob's shop in Montclair, CA, a straight-line distance. From the shop's ZIP code, San Diego is USPS zone 2. San Diego shares the shop's Pacific time zone.
From the production floor
Merch Mob production in Southern California.
Ordering from San Diego
Which participant shirt suits a charity walk or run in San Diego?
Short sleeves for a date from April to November, when highs average 70°F or more; in the cooler months, when highs drop into the 60s, a long-sleeve cotton or blend shirt is the better pick.
More for San Diego
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