Grantham Weather in January
Average highs run from 31°F on January 1 to 29°F on January 31, and lows from 12°F to 8°F. Normal precipitation for the month is 2.73 in over about 11 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
- 29°F
- Average low
- 9°F
- Precipitation
- 2.73 in
- Snowfall
- 15.2 in
- Record high
- 67°FJan 6, 2007
- Record low
- -30°FJan 11, 1968
- Chance of a freeze
- 100%
- Daylight
- 9 h 01 min to 9 h 53 min
- Cloud cover
- 66%
- Humidity
- 92%
- Dew point
- 15°F
- Wind
- 6.3 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 | 31°F | 12°F | 56°F 1966 | -26°F 2018 | 38% | 23% |
| Jan 2 | 31°F | 12°F | 53°F 1979 | -28°F 2018 | 38% | 24% |
| Jan 3 | 30°F | 12°F | 56°F 2000 | -23°F 2014 | 38% | 24% |
| Jan 4 | 30°F | 11°F | 48°F 2000 | -25°F 1981 | 38% | 24% |
| Jan 5 | 30°F | 11°F | 49°F 2007 | -18°F 1981 | 37% | 24% |
| Jan 6 | 30°F | 11°F | 67°F 2007 | -19°F 1976 | 37% | 24% |
| Jan 7 | 30°F | 11°F | 47°F 2007 | -23°F 2018 | 37% | 24% |
| Jan 8 | 30°F | 10°F | 52°F 2008 | -16°F 1973 | 37% | 24% |
| Jan 9 | 30°F | 10°F | 55°F 2008 | -23°F 2004 | 37% | 24% |
| Jan 10 | 29°F | 10°F | 50°F 2016 | -21°F 1968 | 37% | 24% |
| Jan 11 | 29°F | 10°F | 58°F 2020 | -30°F 1968 | 37% | 24% |
| Jan 12 | 29°F | 9°F | 64°F 2020 | -26°F 1968 | 37% | 24% |
| Jan 13 | 29°F | 9°F | 54°F 2017 | -21°F 1971 | 37% | 24% |
| Jan 14 | 29°F | 9°F | 58°F 2005 | -21°F 2004 | 36% | 24% |
| Jan 15 | 29°F | 9°F | 47°F 1989 | -22°F 1964 | 36% | 24% |
| Jan 16 | 29°F | 9°F | 47°F 1973 | -26°F 2009 | 36% | 24% |
| Jan 17 | 29°F | 9°F | 53°F 1973 | -27°F 1971 | 36% | 24% |
| Jan 18 | 29°F | 8°F | 54°F 1986 | -27°F 1971 | 35% | 24% |
| Jan 19 | 29°F | 8°F | 53°F 1973 | -28°F 1971 | 35% | 24% |
| Jan 20 | 29°F | 8°F | 52°F 2006 | -28°F 1971 | 35% | 24% |
| Jan 21 | 29°F | 8°F | 56°F 2006 | -20°F 1971 | 35% | 24% |
| Jan 22 | 29°F | 8°F | 48°F 1967 | -24°F 1984 | 34% | 24% |
| Jan 23 | 29°F | 8°F | 49°F 2002 | -22°F 1970 | 34% | 24% |
| Jan 24 | 29°F | 8°F | 55°F 1967 | -28°F 2011 | 34% | 24% |
| Jan 25 | 29°F | 8°F | 53°F 2010 | -19°F 2003 | 34% | 24% |
| Jan 26 | 29°F | 8°F | 51°F 1978 | -18°F 2004 | 34% | 24% |
| Jan 27 | 29°F | 8°F | 60°F 1974 | -19°F 1987 | 33% | 24% |
| Jan 28 | 29°F | 8°F | 49°F 2006 | -24°F 2003 | 33% | 24% |
| Jan 29 | 29°F | 8°F | 47°F 1989 | -23°F 1963 | 33% | 24% |
| Jan 30 | 29°F | 8°F | 52°F 2013 | -14°F 1973 | 33% | 24% |
| Jan 31 | 29°F | 8°F | 58°F 2013 | -18°F 1971 | 33% | 24% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (EST).
- January 1
- sunrise 7:22 AM, sunset 4:23 PM
- January 31
- sunrise 7:06 AM, sunset 4:59 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00275868 (Newport), public domain. Records: NOAA GHCN-Daily, station USW00094765, 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.