Letterkenny Weather in January
Average highs run from 6°C on January 1 to 7°C on January 31, and lows from 3°C to 3°C. Normal precipitation for the month is 121 mm over about 22 wet days.
January day by day
The normal high and low for each date, in °C.
- Normal low
- Normal high
- Reanalysis extreme high
- Reanalysis extreme low
January at a glance
- Average high
- 7°C
- Average low
- 3°C
- Precipitation
- 121 mm
- Reanalysis high
- 13°CJan 7, 2020
- Reanalysis low
- -3°CJan 10, 2010
- Daylight
- 7 h 19 min to 8 h 43 min
- Cloud cover
- 84%
- Humidity
- 91%
- Dew point
- 3°C
- Wind
- 27.4 km/h
Every day of the month
A wet day has at least 1 mm of precipitation in the reanalysis.
| Date | Normal high | Normal low | Reanalysis high | Reanalysis low | Chance wet |
|---|---|---|---|---|---|
| Jan 1 | 6°C | 3°C | 12°C 2015 | -1°C 2002 | 71% |
| Jan 2 | 6°C | 3°C | 11°C 1992 | -1°C 1995 | 70% |
| Jan 3 | 6°C | 3°C | 11°C 2007 | -1°C 2011 | 70% |
| Jan 4 | 6°C | 3°C | 10°C 2005 | -1°C 2008 | 70% |
| Jan 5 | 7°C | 3°C | 10°C 2004 | -1°C 2003 | 71% |
| Jan 6 | 7°C | 3°C | 10°C 2005 | -1°C 2010 | 71% |
| Jan 7 | 7°C | 3°C | 13°C 2020 | -1°C 2011 | 72% |
| Jan 8 | 7°C | 3°C | 11°C 2007 | -2°C 2010 | 71% |
| Jan 9 | 7°C | 3°C | 12°C 2015 | -3°C 2010 | 72% |
| Jan 10 | 7°C | 3°C | 12°C 1998 | -3°C 2010 | 72% |
| Jan 11 | 7°C | 3°C | 11°C 1998 | -2°C 2003 | 72% |
| Jan 12 | 7°C | 3°C | 11°C 2007 | -1°C 1991 | 73% |
| Jan 13 | 7°C | 3°C | 10°C 1997 | -1°C 1991 | 72% |
| Jan 14 | 7°C | 3°C | 11°C 2002 | 0°C 1991 | 73% |
| Jan 15 | 7°C | 3°C | 11°C 2005 | 0°C 2001 | 72% |
| Jan 16 | 7°C | 3°C | 12°C 1993 | -1°C 2001 | 72% |
| Jan 17 | 7°C | 3°C | 11°C 1993 | 0°C 2001 | 72% |
| Jan 18 | 7°C | 3°C | 12°C 2008 | 0°C 2001 | 72% |
| Jan 19 | 7°C | 3°C | 11°C 2007 | -1°C 2001 | 71% |
| Jan 20 | 7°C | 3°C | 10°C 2002 | -2°C 2001 | 70% |
| Jan 21 | 7°C | 3°C | 11°C 1993 | -1°C 2017 | 70% |
| Jan 22 | 7°C | 3°C | 11°C 2016 | -2°C 2013 | 70% |
| Jan 23 | 7°C | 3°C | 11°C 2008 | -2°C 2013 | 69% |
| Jan 24 | 7°C | 3°C | 13°C 2016 | -2°C 2013 | 68% |
| Jan 25 | 6°C | 3°C | 12°C 2016 | -1°C 1996 | 67% |
| Jan 26 | 6°C | 3°C | 12°C 2003 | -1°C 1996 | 66% |
| Jan 27 | 7°C | 3°C | 11°C 2002 | -1°C 1991 | 67% |
| Jan 28 | 7°C | 3°C | 11°C 2018 | -1°C 1996 | 67% |
| Jan 29 | 7°C | 3°C | 11°C 2013 | -1°C 1996 | 67% |
| Jan 30 | 7°C | 3°C | 10°C 2009 | -1°C 1995 | 68% |
| Jan 31 | 7°C | 3°C | 10°C 2007 | -1°C 1991 | 68% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (GMT).
- January 1
- sunrise 8:55 AM, sunset 4:14 PM
- January 31
- sunrise 8:23 AM, sunset 5:06 PM
Other months
Sources
Cloud, humidity, wind and sunshine, and temperature and precipitation: 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 2026-09-25. Sun and moon: computed with the NOAA solar equations and Meeus.