Hercules climate

Hercules Weather in October

NOAA 1991-2020 normals for Richmond, 13.3 km from Hercules

Average highs run from 75°F on October 1 to 70°F on October 31, and lows from 56°F to 52°F. Normal precipitation for the month is 1.42 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 Hercules, in °F, with the record for each date.20406080100120151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

October at a glance

Average high
73°F
Average low
54°F
Precipitation
1.42 in
Record high
103°FOct 1, 2024
Record low
39°FOct 31, 2019
Chance of a freeze
0%
Days of 90°F or more
1.0
Daylight
11 h 47 min to 10 h 37 min
Cloud cover
35%
Humidity
69%
Dew point
48°F
Wind
6.9 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
Oct 175°F56°F103°F 202446°F 20194%0%
Oct 275°F55°F103°F 202447°F 20194%0%
Oct 375°F55°F102°F 202445°F 20134%0%
Oct 475°F55°F97°F 202446°F 20095%0%
Oct 574°F55°F101°F 202445°F 20095%0%
Oct 674°F55°F103°F 202443°F 20075%0%
Oct 774°F55°F102°F 202446°F 20075%0%
Oct 874°F55°F95°F 202447°F 20076%0%
Oct 974°F55°F89°F 199946°F 20076%0%
Oct 1074°F55°F89°F 199946°F 20196%0%
Oct 1174°F55°F93°F 201045°F 20136%0%
Oct 1274°F54°F93°F 201443°F 20177%0%
Oct 1374°F54°F96°F 201543°F 20087%0%
Oct 1474°F54°F96°F 202045°F 20137%0%
Oct 1573°F54°F93°F 202045°F 20138%0%
Oct 1673°F54°F95°F 202047°F 20138%0%
Oct 1773°F54°F96°F 202046°F 20068%0%
Oct 1873°F54°F93°F 202045°F 20069%0%
Oct 1973°F53°F94°F 202244°F 20219%0%
Oct 2072°F53°F90°F 202043°F 201310%0%
Oct 2172°F53°F91°F 202042°F 200710%0%
Oct 2272°F53°F88°F 201945°F 201310%0%
Oct 2372°F53°F89°F 201944°F 201311%0%
Oct 2472°F53°F92°F 201744°F 202211%0%
Oct 2571°F53°F90°F 200343°F 199912%0%
Oct 2671°F52°F92°F 201742°F 201112%0%
Oct 2771°F52°F92°F 200340°F 202313%0%
Oct 2871°F52°F92°F 200342°F 200613%0%
Oct 2970°F52°F82°F 201541°F 200614%0%
Oct 3070°F52°F85°F 201540°F 202314%0%
Oct 3170°F52°F87°F 201539°F 201915%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Hercules, in percent, and of at least 0.1 inch of snowfall.0510151102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (PDT).

October 1
sunrise 7:05 AM, sunset 6:52 PM
October 31
sunrise 7:34 AM, sunset 6:11 PM

Every day of October: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00047414 (Richmond), public domain. Records: NOAA GHCN-Daily, station USW00023254, 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.