United States · 1991–2020 normal
Lake San Marcos in
September.
Typical September weather in Lake San Marcos: 24.2°C by day, 17.6°C at night, 3 mm of rain over 0.4 wet days. These are measured 1991–2020 station normals, not a forecast.
Typical high24.2°C
Typical low17.6°C
Rain3 mm
Wet days0.4
Comfort score 95 this month (October leads the year at 97). Daylight is calculated as 12 h 20 from latitude 33.13°. Open-water sea temperature is 21.0°C (16 km from the place centre).
Event window
Warm sea in September
The nearest open-water NOAA OISST 1991–2020 cell averages 21.0°C in September. A sheltered bay can run warmer than that open-water cell.
The evidence behind this page
One month,
from the same station.
- Place identity
- GeoNames 5364663
- NOAA station
- USW00003177 · CARLSBAD MCCLELLAN PALOMAR AP
- Station distance
- 6.3 km from the place centre
- Coverage
- Good coverage · 23 usable years
- Important limit
- Historical climate is not a forecast. Nearby stations can miss mountains, coasts, and local microclimates.