United States · 1991–2020 normal
Irwindale in
September.
Typical September weather in Irwindale: 31.5°C by day, 16.6°C at night, 4 mm of rain over 0.3 wet days. These are measured 1991–2020 station normals, not a forecast.
Typical high31.5°C
Typical low16.6°C
Rain4 mm
Wet days0.3
Comfort score 72 this month (May leads the year at 91). Daylight is calculated as 12 h 21 from latitude 34.11°.
The evidence behind this page
One month,
from the same station.
- Place identity
- GeoNames 5359817
- NOAA station
- USC00047785 · SAN GABRIEL FIRE DEPT
- Station distance
- 15.4 km from the place centre
- Coverage
- Good coverage · 21 usable years
- Important limit
- Historical climate is not a forecast. Nearby stations can miss mountains, coasts, and local microclimates.