Planting zone for 93622 — Firebaugh, CA
ZIP code 93622 (Firebaugh, Fresno County) is in USDA zone 9b: the coldest winter night averages 25 to 30 °F.
Where ZIP 93622 is
Outlined: the ZIP code area · tap the map for the zone at any spot · scroll or pinch to zoomNot the official USDA Plant Hardiness Zone Map. Zones come from the 2023 USDA hardiness-zone data by the PRISM Group, Oregon State University; we re-mapped and recolored them. The official map is at planthardiness.ars.usda.gov.
Was 9a on the 2012 map — half a zone warmer now. The zone is the one at the center of the ZIP code; hilly ZIPs can span two zones. What zone 9b means →
Frost forecast — next 7 nights
live from the National Weather ServiceLoading the forecast for Firebaugh, CA…
Forecast data: National Weather Service (api.weather.gov), public domain. This is not a warning service — for official frost and freeze warnings see weather.gov.
Frost dates
A 32 °F frost doesn't happen here in most winters. At the nearest station (NOAA station Los Banos Det Resv, CA — 22 miles away, elevation 407 ft) the median growing season is 338 days. When frost does come, it is a midwinter night or two; cover tender plants when a freeze is forecast.
Frost data: NOAA NCEI U.S. Climate Normals 1991–2020.
When spring arrived in 2026
In 2026, spring leaf-out near 93622 came on Jan 31 — about the same time as the 1991–2020 average (Jan 31).
Jan 312026
Jan 31
The Spring Index marks the day when accumulated warmth is enough for lilac and honeysuckle to leaf out — a widely used signal that the growing season has started. Source: USA National Phenology Network, www.usanpn.org — Spring Indices, first leaf, 2026 (data as of 2026-09-08) and 30-year average 1991–2020 (CC BY 4.0).
Soil in Firebaugh, CA
The soil mapped at the center of ZIP 93622 is Tranquillity — clay, somewhat poorly drained.
Map unit: Tranquillity-Tranquillity, wet, complex, saline-sodic, 0 to 1 percent slopes.
Soil Survey Staff, Natural Resources Conservation Service, USDA. Soil Survey Geographic (SSURGO) Database, via Soil Data Access, accessed 2026-10-29. The soil at the center point of ZIP 93622; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.
Climate in Firebaugh, CA
Average high and low, by month
Precipitation by month inches
NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Los Banos Det Resv, CA (22 mi away); precipitation: Los Banos Arburua Rch, CA (19 mi away). Daylight is calculated from latitude.
Nearby ZIP codes
7 of the 8 nearest ZIP codes are in a different zone — elevation and distance from water change winter lows quickly.
Questions about 93622
What planting zone is ZIP code 93622?
ZIP code 93622 (Firebaugh, CA) is in USDA hardiness zone 9b on the 2023 map: the coldest night of an average winter reaches 25 to 30 °F (−3.9 to −1.1 °C).
How much rain and snow does 93622 get?
About 8.6 inches of precipitation a year (NOAA 1991–2020 normals, Los Banos Arburua Rch station).
How hot do summers get in Firebaugh, CA?
The average high peaks at 95 °F in July, with about 88 days a year at 90 °F or more.
What kind of soil does 93622 have?
The USDA soil survey maps Tranquillity at the center of ZIP 93622: clay, somewhat poorly drained, pH about 8.1 (alkaline).
Did spring come early in Firebaugh, CA in 2026?
Spring leaf-out near 93622 came on Jan 31 in 2026, about the same as the 1991–2020 average (Jan 31), according to the USA National Phenology Network Spring Index.
What kind of onions grow in Firebaugh, CA?
Intermediate onions: the longest day near 93622 is 14 h 41 min, so day-neutral types bulb best; long-day varieties may not bulb fully.
Did the zone for 93622 change?
Yes. The 2012 USDA map put 93622 in zone 9a; the 2023 map puts it in zone 9b. The newer map uses 1991–2020 data and more weather stations.