Porta Potty Rental in Fort Irwin, CA

Planning Around the Weather

The closest NOAA climate-normals station, Barstow Daggett Airport, CA, is about 28 miles from Fort Irwin's Census point, far enough that conditions on your site can differ; treat the 1991–2020 normals below as a guide. DOE's Building America map puts San Bernardino County in the Hot-Dry climate region (IECC 2021 zone 3B, PNNL county guide). This region combines hot summers with low humidity: sun, dust and water supply are the usual planning issues, more than rain.

Dry, Windy Sites

Only about 4 inches of precipitation falls in an average year, in the driest tenth of U.S. places in our data. Dry ground usually holds a truck and a wheelchair well, but open, dry sites can get windy and dusty: ask for units to be staked or tied down on exposed ground.

Heat

About 145 days a year reach 90°F or more, more than nine in ten U.S. places in our data, so heat is the normal condition for months at a time. About 88 of those days reach 100°F, which is top-tenth territory nationally. On sunny, dry sites, place units in shade where the site allows. For rentals longer than a day in the warm months, set servicing by the heat rather than the calendar, shade the units, and add hand-wash stations.

Occasional Freezes

Only about 24 nights a year reach 32°F (fewer than three in four U.S. places in our data), but one hard freeze is enough to damage anything that holds water. For winter dates, ask what the provider does with water-carrying units when a freeze is forecast.

Events, Weddings and Parties

On one of Fort Irwin's hot days, a five-hour event for 1,000 people needs 9 units on the PSAI event chart, or 10 to 11 with alcohol (PSAI adds 10–20%). Every cluster of restrooms needs at least 5% accessible units, rounded up; hard, dry ground usually works as the route to the ADA unit, loose sand or gravel does not.

With only about 24 freezing nights a year, summer is the season to plan around; for a summer wedding, a restroom trailer brings air conditioning but needs a power source, while deluxe units need no hookups. On 100°F days, put drinking water and shade near the restroom rows, not just the stage. For a party at an apartment complex or a rented home, the property manager or landlord decides where units can stand. More: event rentals in California and wedding restrooms in California.