- Latitude: 33.45
- Longitude: -117.68
High Temperatures
On May 21 in this location the average high temperature is 71.9 °F (22.2 °C). The lowest recored high temperature was 57.9 °F (14.4 °C) in 1991 and the highest recored high temperature was 93.0 °F (33.9 °C) in 2017. The high temperature is usually* between 68.3 °F (20.2 °C) and 75.5 °F (24.2 °C). About a quarter of the time, the high temperature is less than 68.3 °F (20.2 °C), and another quarter of the time, the high temperature is greater than and 75.5 °F (24.2 °C). About 95% of the time, the high temperature has been between 61.5 °F (16.4 °C) and 82.3 °F (28.0 °C).
Low Temperatures
On May 21 in this location the average low temperature is 55.9 °F (13.3 °C). The lowest recored low temperature was 7.9 °F (-13.4 °C) in 1994 and the lowest recored low temperature was 66.2 °F (19.0 °C) in 1997. The low temperature is usually* between 53.0 °F (11.7 °C) and 58.7 °F (14.8 °C). About a quarter of the time, the low temperature is less than 53.0 °F (11.7 °C), and another quarter of the time, the low temperature is greater than and 58.7 °F (14.8 °C). About 95% of the time, the low temperature has been between 47.5 °F (8.6 °C) and 64.2 °F (17.9 °C).
Frost
On May 21 in this location expect the temperatures to drop below freezing for a risk of frost about 0.0% of the time.
Data Source(s)
The data used to compute the average high/low temperatures for this location were taken from the following stations:
- J. WAYNE APT-ORANGE CO APT — Integrated Surface Dataset (ISD) station ID: 722977 — Weather Bureau Army Navy (WBAN): 93184 — from year 1941 to 2025
- MARINE CORPS AIR STATION — Integrated Surface Dataset (ISD) station ID: 722926 — Weather Bureau Army Navy (WBAN): 03154 — from year 1973 to 2025
- MCOLF CAMP PENDLETON RED BEAC — Integrated Surface Dataset (ISD) station ID: 722928 — Weather Bureau Army Navy (WBAN): 00369 — from year 2016 to 2022
- MCOLF CAMP PENDLETON (RED BEA — Integrated Surface Dataset (ISD) station ID: 722928 — from year 2010 to 2015
- JOHN WAYNE ARPT ORA — Integrated Surface Dataset (ISD) station ID: 722977 — from year 2000 to 2003
- EL TORO MCAS — Integrated Surface Dataset (ISD) station ID: 690140 — Weather Bureau Army Navy (WBAN): 93101 — from year 1989 to 1998
- FOB DWYER — Integrated Surface Dataset (ISD) station ID: 690160 — Weather Bureau Army Navy (WBAN): 93114 — from year 1990 to 1998
- NEWPORT BEACH — Integrated Surface Dataset (ISD) station ID: 722973 — from year 1982 to 1996
- OCEANSIDE HARBOR — Integrated Surface Dataset (ISD) station ID: 722929 — from year 1985 to 1996
- TUSTIN MCAF — Integrated Surface Dataset (ISD) station ID: 722915 — Weather Bureau Army Navy (WBAN): 93114 — from year 1976 to 1989
- EL TORO MCAS — Weather Bureau Army Navy (WBAN): 93101 — from year 1945 to 1988
- EL TORO(USMC) — Integrated Surface Dataset (ISD) station ID: 722908 — from year 1973 to 1988
- MARINE CORPS AIR STATION — Weather Bureau Army Navy (WBAN): 93114 — from year 1945 to 1975
- SANTA ANA — Weather Bureau Army Navy (WBAN): 93184 — from year 1968 to 1972
- CAMP PENDLETON MCAS — Weather Bureau Army Navy (WBAN): 03154 — from year 1967 to 1971
- OCEANSIDE CAA AP — Weather Bureau Army Navy (WBAN): 23181 — from year 1949 to 1951