- Latitude: 33.038
- Longitude: -116.916
High Temperatures
On September 18 in this location the average high temperature is 80.1 °F (26.7 °C). The lowest recored high temperature was 68.0 °F (20.0 °C) in 1999 and the highest recored high temperature was 102.2 °F (39.0 °C) in 2020. The high temperature is usually* between 75.4 °F (24.1 °C) and 84.9 °F (29.4 °C). About a quarter of the time, the high temperature is less than 75.4 °F (24.1 °C), and another quarter of the time, the high temperature is greater than and 84.9 °F (29.4 °C). About 95% of the time, the high temperature has been between 66.3 °F (19.0 °C) and 94.0 °F (34.5 °C).
Low Temperatures
On September 18 in this location the average low temperature is 60.8 °F (16.0 °C). The lowest recored low temperature was 39.0 °F (3.9 °C) in 2010 and the lowest recored low temperature was 73.0 °F (22.8 °C) in 1981. The low temperature is usually* between 57.8 °F (14.3 °C) and 63.8 °F (17.7 °C). About a quarter of the time, the low temperature is less than 57.8 °F (14.3 °C), and another quarter of the time, the low temperature is greater than and 63.8 °F (17.7 °C). About 95% of the time, the low temperature has been between 52.1 °F (11.1 °C) and 69.5 °F (20.8 °C).
Frost
On September 18 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 2024
- MONTGOMERY FIELD AIRPORT — Integrated Surface Dataset (ISD) station ID: 722903 — Weather Bureau Army Navy (WBAN): 03131 — from year 2006 to 2024
- GILLESPIE FIELD AIRPORT — Integrated Surface Dataset (ISD) station ID: 722907 — Weather Bureau Army Navy (WBAN): 53143 — from year 2006 to 2024
- RAMONA AIRPORT — Integrated Surface Dataset (ISD) station ID: 745056 — Weather Bureau Army Navy (WBAN): 53120 — from year 2006 to 2024
- 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
- MIRAMAR MCAS — Integrated Surface Dataset (ISD) station ID: 722931 — from year 2004 to 2004
- 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 1974 to 1989
- SAN DIEGO MIRAMAR NAS — Weather Bureau Army Navy (WBAN): 93107 — from year 1947 to 1988