Merrimac Weather in January
Average highs run from 45°F on January 1 to 45°F on January 31, and lows from 26°F to 26°F. Normal precipitation for the month is 2.90 in over about 9 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
- 44°F
- Average low
- 25°F
- Precipitation
- 2.90 in
- Snowfall
- 4.6 in
- Record high
- 80°FJan 31, 2002
- Record low
- -1°FJan 19, 1997
- Chance of a freeze
- 100%
- Daylight
- 9 h 32 min to 10 h 16 min
- Cloud cover
- 62%
- Humidity
- 82%
- Dew point
- 26°F
- Wind
- 5.4 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.
| Date | Normal high | Normal low | Record high | Record low | Chance wet | Chance of snow |
|---|---|---|---|---|---|---|
| Jan 1 | 45°F | 26°F | 67°F 2019 | 7°F 1998 | 27% | 7% |
| Jan 2 | 45°F | 26°F | 69°F 2005 | 7°F 2018 | 27% | 7% |
| Jan 3 | 45°F | 26°F | 71°F 1997 | 6°F 2018 | 27% | 7% |
| Jan 4 | 45°F | 26°F | 75°F 1997 | 7°F 2018 | 27% | 7% |
| Jan 5 | 45°F | 26°F | 74°F 2004 | 6°F 2018 | 28% | 7% |
| Jan 6 | 44°F | 26°F | 69°F 1998 | 4°F 2018 | 28% | 8% |
| Jan 7 | 44°F | 26°F | 69°F 2007 | 2°F 2014 | 28% | 8% |
| Jan 8 | 44°F | 25°F | 70°F 1998 | 1°F 2018 | 28% | 8% |
| Jan 9 | 44°F | 25°F | 69°F 2008 | 6°F 2014 | 28% | 8% |
| Jan 10 | 44°F | 25°F | 65°F 2003 | 8°F 2017 | 28% | 8% |
| Jan 11 | 44°F | 25°F | 66°F 2002 | 4°F 2004 | 28% | 8% |
| Jan 12 | 44°F | 25°F | 67°F 2020 | 4°F 2004 | 28% | 8% |
| Jan 13 | 44°F | 25°F | 70°F 2017 | 16°F 2022 | 28% | 8% |
| Jan 14 | 44°F | 25°F | 70°F 2005 | 12°F 1997 | 28% | 9% |
| Jan 15 | 44°F | 25°F | 68°F 2007 | 8°F 2018 | 28% | 9% |
| Jan 16 | 44°F | 25°F | 68°F 2007 | 9°F 2003 | 28% | 9% |
| Jan 17 | 44°F | 25°F | 63°F 2000 | 8°F 2003 | 28% | 9% |
| Jan 18 | 44°F | 25°F | 61°F 1996 | 2°F 2003 | 28% | 9% |
| Jan 19 | 44°F | 25°F | 64°F 2023 | -1°F 1997 | 28% | 9% |
| Jan 20 | 44°F | 25°F | 60°F 2010 | 7°F 2016 | 28% | 9% |
| Jan 21 | 44°F | 25°F | 66°F 2018 | 5°F 2008 | 28% | 9% |
| Jan 22 | 44°F | 25°F | 66°F 2018 | 2°F 2000 | 28% | 10% |
| Jan 23 | 44°F | 25°F | 66°F 2018 | -1°F 2014 | 28% | 10% |
| Jan 24 | 44°F | 25°F | 67°F 1999 | -1°F 2014 | 28% | 10% |
| Jan 25 | 45°F | 25°F | 64°F 2002 | 5°F 2014 | 28% | 10% |
| Jan 26 | 45°F | 25°F | 65°F 2017 | 9°F 2014 | 28% | 10% |
| Jan 27 | 45°F | 25°F | 76°F 2024 | 3°F 2026 | 28% | 10% |
| Jan 28 | 45°F | 25°F | 71°F 2002 | 6°F 2003 | 28% | 10% |
| Jan 29 | 45°F | 25°F | 72°F 2002 | 9°F 2014 | 28% | 10% |
| Jan 30 | 45°F | 25°F | 76°F 2002 | 3°F 2026 | 28% | 10% |
| Jan 31 | 45°F | 26°F | 80°F 2002 | 3°F 2026 | 28% | 10% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (EST).
- January 1
- sunrise 7:30 AM, sunset 5:02 PM
- January 31
- sunrise 7:18 AM, sunset 5:34 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00446712 (Piedmont Rsch Stn), public domain. Records: NOAA GHCN-Daily, station USC00447985, 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.