Cornwall Weather in March
Average highs run from -1°C on March 1 to 7°C on March 31, and lows from -11°C to -3°C. Normal precipitation for the month is 65 mm over about 12 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
- 2°C
- Average low
- -7°C
- Precipitation
- 65 mm
- Reanalysis high
- 25°CMar 21, 2012
- Reanalysis low
- -30°CMar 7, 2007
- Daylight
- 11 h 09 min to 12 h 45 min
- Cloud cover
- 64%
- Humidity
- 85%
- Dew point
- -5°C
- Wind
- 13.3 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 | -1°C | -11°C | 17°C 2017 | -22°C 1992 | 44% |
| Mar 2 | -1°C | -11°C | 11°C 1991 | -26°C 1992 | 45% |
| Mar 3 | -1°C | -11°C | 12°C 2002 | -28°C 2003 | 45% |
| Mar 4 | -1°C | -10°C | 6°C 1999 | -26°C 2003 | 45% |
| Mar 5 | -1°C | -10°C | 9°C 2004 | -20°C 2017 | 45% |
| Mar 6 | 0°C | -10°C | 9°C 2004 | -28°C 2007 | 44% |
| Mar 7 | 0°C | -10°C | 13°C 2012 | -30°C 2007 | 46% |
| Mar 8 | 0°C | -9°C | 16°C 2000 | -24°C 2007 | 47% |
| Mar 9 | 0°C | -9°C | 18°C 2000 | -24°C 2007 | 45% |
| Mar 10 | 0°C | -9°C | 12°C 2006 | -18°C 1999 | 45% |
| Mar 11 | 1°C | -9°C | 12°C 2010 | -21°C 2017 | 44% |
| Mar 12 | 1°C | -8°C | 15°C 2012 | -24°C 1993 | 43% |
| Mar 13 | 1°C | -8°C | 15°C 2012 | -22°C 2003 | 43% |
| Mar 14 | 2°C | -8°C | 13°C 1995 | -21°C 2003 | 44% |
| Mar 15 | 2°C | -8°C | 16°C 1995 | -23°C 1993 | 44% |
| Mar 16 | 2°C | -7°C | 13°C 2010 | -21°C 1992 | 44% |
| Mar 17 | 2°C | -7°C | 16°C 2012 | -19°C 2014 | 43% |
| Mar 18 | 2°C | -7°C | 22°C 2012 | -28°C 1993 | 41% |
| Mar 19 | 3°C | -7°C | 21°C 2012 | -22°C 1993 | 41% |
| Mar 20 | 3°C | -6°C | 24°C 2012 | -16°C 2018 | 41% |
| Mar 21 | 3°C | -6°C | 25°C 2012 | -15°C 2007 | 41% |
| Mar 22 | 4°C | -6°C | 23°C 2012 | -17°C 1992 | 40% |
| Mar 23 | 4°C | -5°C | 16°C 2012 | -19°C 1997 | 39% |
| Mar 24 | 5°C | -5°C | 13°C 2000 | -18°C 1997 | 40% |
| Mar 25 | 5°C | -5°C | 17°C 2000 | -14°C 2008 | 41% |
| Mar 26 | 5°C | -4°C | 19°C 2004 | -12°C 2014 | 42% |
| Mar 27 | 6°C | -4°C | 17°C 1998 | -15°C 2014 | 43% |
| Mar 28 | 6°C | -3°C | 23°C 1998 | -10°C 1996 | 45% |
| Mar 29 | 6°C | -3°C | 19°C 2003 | -11°C 2015 | 45% |
| Mar 30 | 6°C | -3°C | 21°C 1998 | -10°C 2008 | 45% |
| Mar 31 | 7°C | -3°C | 22°C 1998 | -8°C 2003 | 46% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (EDT).
- March 1
- sunrise 6:37 AM, sunset 5:46 PM
- March 31
- sunrise 6:41 AM, sunset 7:26 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 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.