Carmarthen Weather in March
Average highs run from 7°C on March 1 to 10°C on March 31, and lows from 3°C to 4°C. Normal precipitation for the month is 90 mm over about 16 wet days.
March day by day
The normal high and low for each date, in °C.
- Normal low
- Normal high
- Reanalysis extreme high
- Reanalysis extreme low
March at a glance
- Average high
- 9°C
- Average low
- 3°C
- Precipitation
- 90 mm
- Reanalysis high
- 16°CMar 19, 2005
- Reanalysis low
- -7°CMar 1, 2018
- Daylight
- 10 h 54 min to 12 h 54 min
- Cloud cover
- 79%
- Humidity
- 90%
- Dew point
- 5°C
- Wind
- 21.6 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 |
|---|---|---|---|---|---|
| Mar 1 | 7°C | 3°C | 11°C 1999 | -7°C 2018 | 60% |
| Mar 2 | 7°C | 3°C | 11°C 2012 | -3°C 2018 | 60% |
| Mar 3 | 8°C | 3°C | 11°C 1998 | -3°C 2001 | 59% |
| Mar 4 | 8°C | 3°C | 11°C 2007 | -3°C 2001 | 60% |
| Mar 5 | 8°C | 3°C | 11°C 1992 | -2°C 2001 | 58% |
| Mar 6 | 8°C | 3°C | 12°C 1991 | -3°C 2005 | 55% |
| Mar 7 | 8°C | 3°C | 12°C 1991 | -3°C 2010 | 55% |
| Mar 8 | 8°C | 3°C | 12°C 2000 | -3°C 2010 | 54% |
| Mar 9 | 8°C | 3°C | 13°C 2014 | -1°C 2004 | 54% |
| Mar 10 | 8°C | 3°C | 13°C 2012 | -2°C 2004 | 54% |
| Mar 11 | 9°C | 3°C | 14°C 1997 | -3°C 2013 | 53% |
| Mar 12 | 9°C | 4°C | 12°C 1991 | -3°C 2013 | 52% |
| Mar 13 | 9°C | 4°C | 14°C 1991 | -2°C 1996 | 51% |
| Mar 14 | 9°C | 4°C | 12°C 1993 | -2°C 1996 | 51% |
| Mar 15 | 9°C | 4°C | 13°C 1993 | -1°C 2016 | 50% |
| Mar 16 | 9°C | 4°C | 13°C 1999 | -1°C 2006 | 49% |
| Mar 17 | 9°C | 4°C | 15°C 1999 | -2°C 2018 | 47% |
| Mar 18 | 9°C | 4°C | 13°C 2005 | -2°C 2018 | 46% |
| Mar 19 | 9°C | 4°C | 16°C 2005 | -2°C 2001 | 46% |
| Mar 20 | 9°C | 4°C | 15°C 2005 | -2°C 2018 | 44% |
| Mar 21 | 9°C | 4°C | 13°C 2002 | -1°C 2007 | 46% |
| Mar 22 | 9°C | 4°C | 14°C 2012 | -1°C 2006 | 46% |
| Mar 23 | 9°C | 4°C | 14°C 2011 | -1°C 2013 | 45% |
| Mar 24 | 9°C | 4°C | 16°C 2012 | -2°C 2013 | 45% |
| Mar 25 | 10°C | 4°C | 15°C 2012 | -2°C 2013 | 46% |
| Mar 26 | 10°C | 4°C | 16°C 2012 | -2°C 2013 | 46% |
| Mar 27 | 10°C | 4°C | 15°C 2012 | -2°C 2013 | 48% |
| Mar 28 | 10°C | 4°C | 16°C 2012 | -3°C 2013 | 49% |
| Mar 29 | 10°C | 4°C | 14°C 1998 | -3°C 2013 | 49% |
| Mar 30 | 10°C | 4°C | 15°C 2014 | -3°C 2013 | 49% |
| Mar 31 | 10°C | 4°C | 14°C 2004 | -2°C 2013 | 49% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (GMT).
- March 1
- sunrise 7:03 AM, sunset 5:57 PM
- March 31
- sunrise 6:55 AM, sunset 7:49 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.