Black Diamond climate

Black Diamond Weather in September

NOAA 1991-2020 normals for Palmer 3 Ese, 11.4 km from Black Diamond

Average highs run from 74°F on September 1 to 65°F on September 30, and lows from 52°F to 47°F. Normal precipitation for the month is 3.99 in over about 11 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 Black Diamond, in °F, with the record for each date.20406080100151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

September at a glance

Average high
70°F
Average low
50°F
Precipitation
3.99 in
Record high
91°FSep 10, 2020
Record low
40°FSep 23, 2000
Chance of a freeze
0%
Daylight
13 h 21 min to 11 h 43 min
Cloud cover
48%
Humidity
76%
Dew point
49°F
Wind
3.4 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 174°F52°F90°F 200646°F 202132%0%
Sep 273°F52°F89°F 200647°F 200832%0%
Sep 373°F52°F89°F 200350°F 200833%0%
Sep 473°F52°F87°F 201747°F 200233%0%
Sep 573°F52°F90°F 202446°F 201534%0%
Sep 673°F51°F89°F 202447°F 200234%0%
Sep 772°F51°F89°F 201250°F 200034%0%
Sep 872°F51°F87°F 199947°F 200235%0%
Sep 972°F51°F88°F 202049°F 200135%0%
Sep 1072°F51°F91°F 202049°F 200836%0%
Sep 1172°F51°F89°F 201347°F 201436%0%
Sep 1271°F51°F84°F 199948°F 201237%0%
Sep 1371°F50°F90°F 199946°F 200337%0%
Sep 1471°F50°F88°F 200049°F 201438%0%
Sep 1570°F50°F86°F 201447°F 200338%0%
Sep 1670°F50°F91°F 202546°F 202139%0%
Sep 1770°F50°F81°F 201248°F 201839%0%
Sep 1870°F50°F83°F 200946°F 201840%0%
Sep 1969°F49°F87°F 199948°F 201340%0%
Sep 2069°F49°F82°F 199946°F 200140%0%
Sep 2169°F49°F83°F 199942°F 200241%0%
Sep 2268°F49°F86°F 199944°F 200041%0%
Sep 2368°F49°F84°F 200940°F 200042%0%
Sep 2467°F48°F77°F 200641°F 200042%0%
Sep 2567°F48°F80°F 202142°F 200043%0%
Sep 2667°F48°F83°F 202243°F 201343%0%
Sep 2766°F48°F82°F 200342°F 201544%0%
Sep 2866°F47°F88°F 201744°F 199944%0%
Sep 2966°F47°F78°F 200843°F 201945%0%
Sep 3065°F47°F73°F 202040°F 201945%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Black Diamond, in percent, and of at least 0.1 inch of snowfall.010203040501102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (PDT).

September 1
sunrise 6:27 AM, sunset 7:48 PM
September 30
sunrise 7:06 AM, sunset 6:49 PM

Every day of September: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00456295 (Palmer 3 Ese), public domain. Records: NOAA GHCN-Daily, station USW00094248, 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.