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Earlier editions: 2026-09

Division 8 — Planning and Development›Chapter 1.1 — Zoning (Coastal)

Ventura County Municipal Code Appendix L2 Calculating the Water Budget of a Project Site

Ventura County Municipal Code · 2026-10 edition · updated 2026-10-04 · Ventura County

Cite as: Ventura County Municipal Code APPENDIX L2 · Text as of 2026-10-04

Reference Evapotranspiration (ETo) Table*

Monthly Average Reference Evapotranspiration by ETo Zone (inches/year)

Ventura JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC TOTAL
* 2.2 2.6 3.2 3.8 4.6 4.7 5.5 4.9 4.1 3.4 2.5 2.0 43.5

* The values in the table for Ventura County were derived from:

  1. California Irrigation Management Information System (CIMIS);

  2. Reference Evapotranspiration Zones Map, University of California Department of Land Air & Water Resources and California Department of Water Resources 1999; and

  3. Reference Evapotranspiration for California, University of California, Department of Agriculture and Natural Resources (1987) Bulletin 1922;

  4. Determining Daily Reference Evapotranspiration, Cooperative Extension University of California and Natural Resources (1987), Publication Leaflet 21426

(Ord. No. 4492, § 9, 6-21-2016)

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Ventura County Municipal Code

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