Acton Weather in January
Average highs run from 58°F on January 1 to 61°F on January 31, and lows from 34°F to 36°F. Normal precipitation for the month is 1.43 in over about 5 wet days.
January day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
January at a glance
- Average high
- 60°F
- Average low
- 35°F
- Precipitation
- 1.43 in
- Record high
- 85°FJan 11, 2010
- Record low
- 3°FJan 13, 1963
- Chance of a freeze
- 99%
- Daylight
- 9 h 55 min to 10 h 31 min
- Cloud cover
- 46%
- Humidity
- 60%
- Dew point
- 31°F
- Wind
- 8.5 mph
Every day of the month
A wet day has at least 0.01 inch of precipitation.
| Date | Normal high | Normal low | Record high | Record low | Chance wet |
|---|---|---|---|---|---|
| Jan 1 | 58°F | 34°F | 74°F 1959 | 16°F 1954 | 15% |
| Jan 2 | 58°F | 34°F | 70°F 2018 | 14°F 1974 | 15% |
| Jan 3 | 58°F | 34°F | 74°F 2007 | 10°F 1970 | 16% |
| Jan 4 | 58°F | 34°F | 72°F 2018 | 13°F 1970 | 16% |
| Jan 5 | 58°F | 34°F | 72°F 2018 | 11°F 1949 | 16% |
| Jan 6 | 58°F | 34°F | 73°F 2012 | 10°F 1950 | 16% |
| Jan 7 | 59°F | 34°F | 80°F 1969 | 11°F 1950 | 16% |
| Jan 8 | 59°F | 34°F | 73°F 2009 | 14°F 1937 | 16% |
| Jan 9 | 59°F | 34°F | 69°F 1962 | 13°F 1964 | 16% |
| Jan 10 | 59°F | 34°F | 71°F 2014 | 14°F 1954 | 16% |
| Jan 11 | 59°F | 35°F | 85°F 2010 | 15°F 1962 | 16% |
| Jan 12 | 59°F | 35°F | 72°F 1953 | 11°F 1963 | 16% |
| Jan 13 | 59°F | 35°F | 72°F 2010 | 3°F 1963 | 16% |
| Jan 14 | 59°F | 35°F | 75°F 2010 | 7°F 1963 | 16% |
| Jan 15 | 60°F | 35°F | 75°F 2021 | 11°F 1963 | 16% |
| Jan 16 | 60°F | 35°F | 76°F 2021 | 13°F 1949 | 16% |
| Jan 17 | 60°F | 35°F | 76°F 2011 | 12°F 1949 | 16% |
| Jan 18 | 60°F | 35°F | 76°F 1959 | 15°F 2007 | 16% |
| Jan 19 | 60°F | 35°F | 74°F 2012 | 18°F 1936 | 16% |
| Jan 20 | 60°F | 35°F | 81°F 1971 | 12°F 1963 | 16% |
| Jan 21 | 60°F | 35°F | 74°F 1950 | 9°F 1937 | 16% |
| Jan 22 | 60°F | 35°F | 72°F 1970 | 10°F 1937 | 16% |
| Jan 23 | 60°F | 35°F | 78°F 1970 | 11°F 1937 | 16% |
| Jan 24 | 60°F | 35°F | 74°F 1959 | 20°F 1973 | 16% |
| Jan 25 | 61°F | 35°F | 73°F 2003 | 18°F 1950 | 16% |
| Jan 26 | 61°F | 35°F | 77°F 1951 | 12°F 1949 | 16% |
| Jan 27 | 61°F | 35°F | 74°F 2003 | 15°F 1950 | 16% |
| Jan 28 | 61°F | 35°F | 72°F 2018 | 4°F 1957 | 16% |
| Jan 29 | 61°F | 35°F | 76°F 2014 | 19°F 1970 | 16% |
| Jan 30 | 61°F | 35°F | 74°F 2003 | 11°F 1957 | 16% |
| Jan 31 | 61°F | 36°F | 79°F 2003 | 9°F 1957 | 16% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (PST).
- January 1
- sunrise 6:59 AM, sunset 4:54 PM
- January 31
- sunrise 6:51 AM, sunset 5:22 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00046624 (Palmdale), public domain. Records: NOAA GHCN-Daily, station USW00023182, 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.