Blackhawk climate

Blackhawk Weather in October

NOAA 1991-2020 normals for Mt Diablo Junction, 6.8 km from Blackhawk

Average highs run from 77°F on October 1 to 66°F on October 31, and lows from 58°F to 50°F. Normal precipitation for the month is 1.19 in over about 3 wet days.

October day by day

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

Normal daily high and low temperature at Blackhawk, in °F, with the record for each date.20406080100120151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

October at a glance

Average high
72°F
Average low
54°F
Precipitation
1.19 in
Record high
110°FOct 2, 2024
Record low
29°FOct 30, 1971
Chance of a freeze
0%
Days of 90°F or more
1.3
Daylight
11 h 47 min to 10 h 38 min
Cloud cover
31%
Humidity
61%
Dew point
44°F
Wind
7.6 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
Oct 177°F58°F104°F 202436°F 19716%0%
Oct 276°F57°F110°F 202435°F 19506%0%
Oct 376°F57°F109°F 202439°F 19117%0%
Oct 476°F57°F106°F 198040°F 19147%0%
Oct 575°F57°F103°F 202437°F 19697%0%
Oct 675°F57°F104°F 202437°F 19418%0%
Oct 775°F56°F103°F 202438°F 19168%0%
Oct 874°F56°F101°F 199638°F 19418%0%
Oct 974°F56°F96°F 193639°F 19419%0%
Oct 1074°F56°F96°F 199137°F 19689%0%
Oct 1174°F55°F97°F 195835°F 19249%0%
Oct 1273°F55°F96°F 197135°F 194710%0%
Oct 1373°F55°F98°F 197135°F 194710%0%
Oct 1473°F55°F100°F 195036°F 191310%0%
Oct 1572°F54°F95°F 199136°F 191311%0%
Oct 1672°F54°F97°F 196136°F 190511%0%
Oct 1772°F54°F98°F 196134°F 190512%0%
Oct 1871°F54°F95°F 190333°F 194912%0%
Oct 1971°F53°F97°F 202234°F 190512%0%
Oct 2071°F53°F100°F 191331°F 194913%0%
Oct 2170°F53°F95°F 190332°F 194913%0%
Oct 2270°F53°F96°F 191334°F 190814%0%
Oct 2369°F52°F90°F 191333°F 196114%0%
Oct 2469°F52°F91°F 191431°F 195615%0%
Oct 2569°F52°F93°F 195931°F 190515%0%
Oct 2668°F52°F95°F 191333°F 193916%0%
Oct 2768°F51°F93°F 191330°F 194616%0%
Oct 2868°F51°F91°F 200330°F 194616%0%
Oct 2967°F51°F92°F 191532°F 194617%0%
Oct 3067°F51°F92°F 191529°F 197117%0%
Oct 3166°F50°F92°F 191529°F 193518%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Blackhawk, in percent, and of at least 0.1 inch of snowfall.051015201102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (PDT).

October 1
sunrise 7:03 AM, sunset 6:50 PM
October 31
sunrise 7:32 AM, sunset 6:10 PM

Every day of October: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00045915 (Mt Diablo Junction), public domain. Records: NOAA GHCN-Daily, station USC00044997, 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.