- Latitude: 33.286
- Longitude: -117.456
High Temperatures
On May 21 in this location the average high temperature is 70.4 °F (21.3 °C). The lowest recored high temperature was 57.9 °F (14.4 °C) in 1991 and the highest recored high temperature was 95.5 °F (35.3 °C) in 2017. The high temperature is usually* between 67.0 °F (19.5 °C) and 73.8 °F (23.2 °C). About a quarter of the time, the high temperature is less than 67.0 °F (19.5 °C), and another quarter of the time, the high temperature is greater than and 73.8 °F (23.2 °C). About 95% of the time, the high temperature has been between 60.7 °F (15.9 °C) and 80.1 °F (26.7 °C).
Low Temperatures
On May 21 in this location the average low temperature is 55.6 °F (13.1 °C). The lowest recored low temperature was 42.1 °F (5.6 °C) in 2002 and the lowest recored low temperature was 64.9 °F (18.3 °C) in 1976. The low temperature is usually* between 52.9 °F (11.6 °C) and 58.4 °F (14.7 °C). About a quarter of the time, the low temperature is less than 52.9 °F (11.6 °C), and another quarter of the time, the low temperature is greater than and 58.4 °F (14.7 °C). About 95% of the time, the low temperature has been between 47.6 °F (8.7 °C) and 63.7 °F (17.6 °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:
- MARINE CORPS AIR STATION — Integrated Surface Dataset (ISD) station ID: 722926 — Weather Bureau Army Navy (WBAN): 03154 — from year 1973 to 2025
- MCCLELLAN-PALOMAR AIRPORT — Integrated Surface Dataset (ISD) station ID: 722927 — Weather Bureau Army Navy (WBAN): 03177 — from year 2006 to 2025
- OCEANSIDE MUNICIPAL ARPT — Integrated Surface Dataset (ISD) station ID: 722934 — Weather Bureau Army Navy (WBAN): 53121 — from year 2006 to 2025
- FALLBROOK 5 NE — Weather Bureau Army Navy (WBAN): 53151 — from year 2008 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
- MC CLELLAN PALOMAR — Integrated Surface Dataset (ISD) station ID: 722927 — from year 1973 to 2005
- OCEANSIDE MUNI — Integrated Surface Dataset (ISD) station ID: 722934 — from year 2000 to 2005
- OCEANSIDE HARBOR — Integrated Surface Dataset (ISD) station ID: 722929 — from year 1985 to 1996
- 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