Hercules climate

Hercules Weather in January

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

Average highs run from 57°F on January 1 to 60°F on January 31, and lows from 44°F to 45°F. Normal precipitation for the month is 4.83 in over about 10 wet days.

January 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.20406080151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

January at a glance

Average high
58°F
Average low
44°F
Precipitation
4.83 in
Record high
78°FJan 18, 2021
Record low
24°FJan 13, 2007
Chance of a freeze
14%
Daylight
9 h 36 min to 10 h 17 min
Cloud cover
59%
Humidity
84%
Dew point
44°F
Wind
7.4 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
Jan 157°F44°F66°F 201830°F 201632%0%
Jan 257°F44°F66°F 202028°F 202232%0%
Jan 357°F44°F66°F 201428°F 201332%0%
Jan 457°F44°F68°F 201428°F 200932%0%
Jan 557°F44°F68°F 201232°F 200132%0%
Jan 657°F44°F64°F 201531°F 201732%0%
Jan 757°F44°F69°F 201232°F 202432%0%
Jan 858°F44°F67°F 202532°F 200732%0%
Jan 958°F44°F73°F 202532°F 200932%0%
Jan 1058°F44°F65°F 201529°F 201132%0%
Jan 1158°F44°F68°F 202531°F 200932%0%
Jan 1258°F44°F74°F 200928°F 200732%0%
Jan 1358°F44°F70°F 200924°F 200732%0%
Jan 1458°F44°F68°F 202128°F 200733%0%
Jan 1558°F44°F71°F 200926°F 200733%0%
Jan 1658°F44°F75°F 202126°F 200733%0%
Jan 1758°F44°F76°F 202128°F 201333%0%
Jan 1858°F44°F78°F 202128°F 201333%0%
Jan 1958°F44°F69°F 201928°F 201333%0%
Jan 2058°F44°F69°F 202130°F 201333%0%
Jan 2159°F44°F70°F 201429°F 201333%0%
Jan 2259°F44°F72°F 201131°F 201333%0%
Jan 2359°F44°F69°F 202530°F 200233%0%
Jan 2459°F45°F71°F 201431°F 200733%0%
Jan 2559°F45°F73°F 201432°F 200233%0%
Jan 2659°F45°F68°F 201433°F 202133%0%
Jan 2759°F45°F69°F 201930°F 200133%0%
Jan 2859°F45°F69°F 201532°F 202533%0%
Jan 2959°F45°F69°F 202433°F 200233%0%
Jan 3060°F45°F70°F 201529°F 200233%0%
Jan 3160°F45°F77°F 201530°F 200233%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.0102030401102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (PST).

January 1
sunrise 7:25 AM, sunset 5:01 PM
January 31
sunrise 7:14 AM, sunset 5:31 PM

Every day of January: 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.