Riverhead Weather in January
Average highs run from 41°F on January 1 to 39°F on January 31, and lows from 28°F to 25°F. Normal precipitation for the month is 3.79 in over about 10 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
- 40°F
- Average low
- 26°F
- Precipitation
- 3.79 in
- Snowfall
- 7.2 in
- Record high
- 67°FJan 12, 2020
- Record low
- -15°FJan 17, 2009
- Chance of a freeze
- 100%
- Daylight
- 9 h 18 min to 10 h 05 min
- Cloud cover
- 64%
- Humidity
- 83%
- Dew point
- 28°F
- Wind
- 13.6 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.
| Date | Normal high | Normal low | Record high | Record low | Chance wet | Chance of snow |
|---|---|---|---|---|---|---|
| Jan 1 | 41°F | 28°F | 61°F 2019 | -3°F 2018 | 34% | 8% |
| Jan 2 | 41°F | 28°F | 56°F 2022 | 2°F 2018 | 34% | 9% |
| Jan 3 | 41°F | 28°F | 54°F 2023 | -3°F 2014 | 34% | 9% |
| Jan 4 | 41°F | 28°F | 57°F 2000 | -13°F 2014 | 34% | 9% |
| Jan 5 | 41°F | 27°F | 56°F 2007 | 2°F 2014 | 34% | 9% |
| Jan 6 | 41°F | 27°F | 60°F 2007 | 2°F 1999 | 34% | 9% |
| Jan 7 | 40°F | 27°F | 57°F 2012 | 3°F 2018 | 34% | 9% |
| Jan 8 | 40°F | 27°F | 57°F 2007 | 3°F 1968 | 34% | 9% |
| Jan 9 | 40°F | 27°F | 58°F 2008 | -9°F 2017 | 34% | 9% |
| Jan 10 | 40°F | 26°F | 59°F 2016 | -3°F 2017 | 34% | 9% |
| Jan 11 | 40°F | 26°F | 57°F 2020 | -4°F 2004 | 34% | 9% |
| Jan 12 | 40°F | 26°F | 67°F 2020 | 2°F 1968 | 33% | 9% |
| Jan 13 | 40°F | 26°F | 57°F 2017 | -2°F 1968 | 33% | 9% |
| Jan 14 | 40°F | 26°F | 59°F 2013 | -4°F 2011 | 33% | 10% |
| Jan 15 | 39°F | 26°F | 55°F 2007 | -3°F 2009 | 33% | 10% |
| Jan 16 | 39°F | 26°F | 55°F 2007 | -14°F 2009 | 33% | 10% |
| Jan 17 | 39°F | 26°F | 53°F 1999 | -15°F 2009 | 33% | 10% |
| Jan 18 | 39°F | 25°F | 58°F 2006 | -12°F 1965 | 32% | 10% |
| Jan 19 | 39°F | 25°F | 52°F 1953 | -4°F 2000 | 32% | 10% |
| Jan 20 | 39°F | 25°F | 55°F 2013 | 3°F 2000 | 32% | 10% |
| Jan 21 | 39°F | 25°F | 56°F 2006 | -2°F 2026 | 32% | 10% |
| Jan 22 | 39°F | 25°F | 54°F 1959 | -7°F 2005 | 32% | 10% |
| Jan 23 | 39°F | 25°F | 55°F 2018 | -8°F 2014 | 31% | 10% |
| Jan 24 | 39°F | 25°F | 67°F 1967 | -7°F 2013 | 31% | 10% |
| Jan 25 | 39°F | 25°F | 57°F 2024 | 1°F 2003 | 31% | 10% |
| Jan 26 | 39°F | 25°F | 58°F 1967 | 5°F 1961 | 31% | 10% |
| Jan 27 | 39°F | 25°F | 56°F 2012 | -1°F 2022 | 30% | 10% |
| Jan 28 | 39°F | 25°F | 61°F 2002 | -2°F 2005 | 30% | 10% |
| Jan 29 | 39°F | 25°F | 63°F 2002 | -6°F 2005 | 30% | 10% |
| Jan 30 | 39°F | 25°F | 60°F 2006 | -6°F 2014 | 30% | 10% |
| Jan 31 | 39°F | 25°F | 57°F 2013 | -9°F 2026 | 30% | 10% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (EST).
- January 1
- sunrise 7:15 AM, sunset 4:33 PM
- January 31
- sunrise 7:02 AM, sunset 5:07 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00307134 (Riverhead Rsch Farm), public domain. Records: NOAA GHCN-Daily, station USW00014719, 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.