Pasadena Hills Weather in September
Average highs run from 89°F on September 1 to 87°F on September 30, and lows from 72°F to 69°F. Normal precipitation for the month is 6.63 in over about 13 wet days.
September day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
September at a glance
- Average high
- 88°F
- Average low
- 71°F
- Precipitation
- 6.63 in
- Record high
- 99°FSep 8, 1925
- Record low
- 56°FSep 24, 1990
- Chance of a freeze
- 0%
- Days of 90°F or more
- 18.9
- Daylight
- 12 h 43 min to 11 h 55 min
- Cloud cover
- 57%
- Humidity
- 84%
- Dew point
- 73°F
- Wind
- 6.9 mph
Every day of the month
A wet day has at least 0.01 inch of precipitation.
| Date | Normal high | Normal low | Record high | Record low | Chance wet |
|---|---|---|---|---|---|
| Sep 1 | 89°F | 72°F | 96°F 1963 | 66°F 1906 | 51% |
| Sep 2 | 89°F | 72°F | 96°F 1963 | 66°F 1934 | 50% |
| Sep 3 | 89°F | 72°F | 96°F 1944 | 64°F 1934 | 50% |
| Sep 4 | 89°F | 72°F | 97°F 1944 | 67°F 1969 | 49% |
| Sep 5 | 89°F | 72°F | 96°F 1925 | 64°F 1909 | 49% |
| Sep 6 | 89°F | 72°F | 97°F 1989 | 65°F 1997 | 48% |
| Sep 7 | 89°F | 72°F | 98°F 1925 | 66°F 1984 | 48% |
| Sep 8 | 89°F | 72°F | 99°F 1925 | 66°F 1984 | 48% |
| Sep 9 | 89°F | 72°F | 96°F 1990 | 65°F 1997 | 47% |
| Sep 10 | 89°F | 72°F | 96°F 1925 | 65°F 1896 | 47% |
| Sep 11 | 89°F | 72°F | 97°F 1925 | 65°F 1956 | 46% |
| Sep 12 | 89°F | 72°F | 97°F 1989 | 65°F 1946 | 45% |
| Sep 13 | 89°F | 72°F | 96°F 1989 | 65°F 1946 | 45% |
| Sep 14 | 89°F | 71°F | 96°F 1989 | 59°F 2001 | 44% |
| Sep 15 | 89°F | 71°F | 96°F 1984 | 62°F 1976 | 44% |
| Sep 16 | 89°F | 71°F | 96°F 1927 | 61°F 1976 | 43% |
| Sep 17 | 88°F | 71°F | 97°F 1999 | 63°F 1895 | 43% |
| Sep 18 | 88°F | 71°F | 96°F 1925 | 60°F 1910 | 42% |
| Sep 19 | 88°F | 71°F | 95°F 1945 | 60°F 1910 | 42% |
| Sep 20 | 88°F | 71°F | 97°F 2000 | 58°F 1910 | 41% |
| Sep 21 | 88°F | 71°F | 97°F 1925 | 58°F 1897 | 41% |
| Sep 22 | 88°F | 71°F | 95°F 1925 | 61°F 1918 | 40% |
| Sep 23 | 88°F | 70°F | 95°F 1900 | 57°F 1897 | 39% |
| Sep 24 | 88°F | 70°F | 97°F 1925 | 56°F 1990 | 39% |
| Sep 25 | 88°F | 70°F | 95°F 1925 | 59°F 1990 | 38% |
| Sep 26 | 87°F | 70°F | 95°F 2009 | 61°F 1903 | 38% |
| Sep 27 | 87°F | 70°F | 95°F 1980 | 58°F 1956 | 37% |
| Sep 28 | 87°F | 70°F | 95°F 1944 | 58°F 1931 | 37% |
| Sep 29 | 87°F | 69°F | 96°F 1972 | 57°F 1931 | 36% |
| Sep 30 | 87°F | 69°F | 96°F 2004 | 58°F 1947 | 35% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (EDT).
- September 1
- sunrise 7:07 AM, sunset 7:50 PM
- September 30
- sunrise 7:21 AM, sunset 7:16 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00087851 (Saint Leo), public domain. Records: NOAA GHCN-Daily, station USC00087851, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.