Descanso climate

Descanso Weather in September

NOAA 1991-2020 normals for Cuyamaca, 15.4 km from Descanso

Average highs run from 83°F on September 1 to 74°F on September 30, and lows from 56°F to 46°F. Normal precipitation for the month is 0.57 in over about 2 wet days.

September day by day

The normal high and low for each date, and the record, in °F.

Normal daily high and low temperature at Descanso, in °F, with the record for each date.406080100120151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

September at a glance

Average high
79°F
Average low
51°F
Precipitation
0.57 in
Record high
114°FSep 5, 2020
Record low
49°FSep 12, 1985
Chance of a freeze
2%
Days of 90°F or more
2.3
Daylight
12 h 50 min to 11 h 52 min
Cloud cover
21%
Humidity
33%
Dew point
45°F
Wind
8.9 mph

Every day of the month

A wet day has at least 0.01 inch of precipitation; snow means at least 0.1 inch of snowfall.

DateNormal highNormal lowRecord highRecord lowChance wetChance of snow
Sep 183°F56°F106°F 198756°F 19896%0%
Sep 283°F55°F109°F 198251°F 19996%0%
Sep 383°F55°F109°F 198856°F 19996%0%
Sep 483°F55°F109°F 198855°F 20006%0%
Sep 582°F55°F114°F 202057°F 20006%0%
Sep 682°F54°F107°F 202057°F 19856%0%
Sep 782°F54°F103°F 202455°F 19876%0%
Sep 882°F54°F108°F 202458°F 19876%0%
Sep 981°F54°F104°F 202454°F 19806%0%
Sep 1081°F53°F102°F 198353°F 20106%0%
Sep 1181°F53°F105°F 198356°F 19856%0%
Sep 1281°F53°F102°F 200049°F 19856%0%
Sep 1380°F52°F100°F 201453°F 19856%0%
Sep 1480°F52°F102°F 201251°F 19856%0%
Sep 1580°F52°F108°F 198952°F 19806%0%
Sep 1679°F51°F104°F 201453°F 20166%0%
Sep 1779°F51°F102°F 202054°F 19866%0%
Sep 1879°F51°F104°F 202053°F 19936%0%
Sep 1978°F50°F98°F 198153°F 19936%0%
Sep 2078°F50°F105°F 201550°F 19896%0%
Sep 2178°F49°F101°F 202150°F 19866%0%
Sep 2277°F49°F101°F 198250°F 19866%0%
Sep 2377°F49°F102°F 200950°F 20106%0%
Sep 2476°F48°F102°F 200950°F 19886%0%
Sep 2576°F48°F99°F 198953°F 19886%0%
Sep 2676°F48°F105°F 201054°F 19936%0%
Sep 2775°F47°F109°F 201050°F 19867%0%
Sep 2875°F47°F100°F 199350°F 19827%0%
Sep 2974°F47°F105°F 199952°F 19867%0%
Sep 3074°F46°F107°F 202049°F 19827%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Descanso, in percent, and of at least 0.1 inch of snowfall.024681102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (PDT).

September 1
sunrise 6:21 AM, sunset 7:11 PM
September 30
sunrise 6:40 AM, sunset 6:32 PM

Every day of September: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00042239 (Cuyamaca), public domain. Records: NOAA GHCN-Daily, station USC00042706, 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.