- Latitude: 33.038
- Longitude: -116.916
High Temperatures
On April 20 in this location the average high temperature is 71.0 °F (21.6 °C). The lowest recored high temperature was 57.0 °F (13.9 °C) in 1967 and the highest recored high temperature was 100.0 °F (37.8 °C) in 2009. The high temperature is usually* between 65.4 °F (18.5 °C) and 76.6 °F (24.8 °C). About a quarter of the time, the high temperature is less than 65.4 °F (18.5 °C), and another quarter of the time, the high temperature is greater than and 76.6 °F (24.8 °C). About 95% of the time, the high temperature has been between 54.7 °F (12.6 °C) and 87.2 °F (30.7 °C).
Low Temperatures
On April 20 in this location the average low temperature is 50.9 °F (10.5 °C). The lowest recored low temperature was 32.0 °F (0.0 °C) in 2025 and the lowest recored low temperature was 66.2 °F (19.0 °C) in 2013. The low temperature is usually* between 47.7 °F (8.7 °C) and 54.1 °F (12.3 °C). About a quarter of the time, the low temperature is less than 47.7 °F (8.7 °C), and another quarter of the time, the low temperature is greater than and 54.1 °F (12.3 °C). About 95% of the time, the low temperature has been between 41.7 °F (5.4 °C) and 60.1 °F (15.6 °C).
Frost
On April 20 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: 722931 — Weather Bureau Army Navy (WBAN): 93107 — from year 2005 to 2025
- MONTGOMERY FIELD AIRPORT — Integrated Surface Dataset (ISD) station ID: 722903 — Weather Bureau Army Navy (WBAN): 03131 — from year 2006 to 2025
- GILLESPIE FIELD AIRPORT — Integrated Surface Dataset (ISD) station ID: 722907 — Weather Bureau Army Navy (WBAN): 53143 — from year 2006 to 2025
- RAMONA AIRPORT — Integrated Surface Dataset (ISD) station ID: 745056 — Weather Bureau Army Navy (WBAN): 53120 — from year 2006 to 2025
- GILLESPIE FLD — Integrated Surface Dataset (ISD) station ID: 722907 — from year 1973 to 2005
- MONTGOMERY FLD — Integrated Surface Dataset (ISD) station ID: 722903 — from year 1990 to 2005
- RAMONA — Integrated Surface Dataset (ISD) station ID: 745056 — from year 1999 to 2005
- SAN DIEGO/MIRAMAR N — Integrated Surface Dataset (ISD) station ID: 722930 — Weather Bureau Army Navy (WBAN): 93107 — from year 1989 to 2003
- SAN DIEGO/MONTGOMER — Integrated Surface Dataset (ISD) station ID: 722901 — from year 1973 to 1989
- SAN DIEGO MIRAMAR NAS — Weather Bureau Army Navy (WBAN): 93107 — from year 1948 to 1988