América Weather in May
Average highs run from 21°C on May 1 to 16°C on May 31, and lows from 9°C to 5°C. Normal precipitation for the month is 40 mm over about 6 wet days.
May day by day
The normal high and low for each date, in °C.
- Normal low
- Normal high
- Reanalysis extreme high
- Reanalysis extreme low
May at a glance
- Average high
- 18°C
- Average low
- 7°C
- Precipitation
- 40 mm
- Reanalysis high
- 30°CMay 2, 2009
- Reanalysis low
- -4°CMay 29, 2008
- Daylight
- 10 h 39 min to 9 h 55 min
- Cloud cover
- 58%
- Humidity
- 76%
- Dew point
- 8°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 |
|---|---|---|---|---|---|
| May 1 | 21°C | 9°C | 29°C 2009 | 3°C 2008 | 21% |
| May 2 | 21°C | 9°C | 30°C 2009 | 3°C 2011 | 20% |
| May 3 | 21°C | 9°C | 29°C 2009 | 2°C 2011 | 20% |
| May 4 | 20°C | 9°C | 27°C 1996 | 3°C 2001 | 19% |
| May 5 | 20°C | 8°C | 26°C 1994 | 2°C 2001 | 19% |
| May 6 | 20°C | 8°C | 26°C 1997 | 2°C 2005 | 20% |
| May 7 | 20°C | 8°C | 27°C 1997 | 0°C 2007 | 19% |
| May 8 | 20°C | 8°C | 28°C 1997 | 0°C 2007 | 19% |
| May 9 | 20°C | 8°C | 28°C 2009 | 2°C 2007 | 18% |
| May 10 | 19°C | 8°C | 26°C 1997 | 2°C 2007 | 18% |
| May 11 | 19°C | 8°C | 26°C 2002 | 3°C 2012 | 18% |
| May 12 | 19°C | 8°C | 27°C 1997 | 0°C 2007 | 19% |
| May 13 | 19°C | 8°C | 27°C 1997 | 1°C 2001 | 19% |
| May 14 | 19°C | 8°C | 25°C 1997 | 1°C 2004 | 19% |
| May 15 | 19°C | 7°C | 24°C 2008 | -1°C 2013 | 20% |
| May 16 | 18°C | 7°C | 25°C 2020 | 0°C 2013 | 20% |
| May 17 | 18°C | 7°C | 27°C 2008 | 1°C 2010 | 20% |
| May 18 | 18°C | 7°C | 27°C 2008 | 1°C 2010 | 20% |
| May 19 | 18°C | 7°C | 29°C 2008 | 1°C 1992 | 19% |
| May 20 | 18°C | 7°C | 27°C 2015 | 0°C 2006 | 19% |
| May 21 | 18°C | 7°C | 26°C 2009 | -1°C 2006 | 17% |
| May 22 | 17°C | 6°C | 29°C 2009 | 0°C 2006 | 17% |
| May 23 | 17°C | 6°C | 27°C 2009 | -1°C 1997 | 18% |
| May 24 | 17°C | 6°C | 25°C 2009 | 0°C 1997 | 18% |
| May 25 | 17°C | 6°C | 21°C 2010 | -1°C 1993 | 18% |
| May 26 | 17°C | 6°C | 23°C 2002 | 0°C 1993 | 16% |
| May 27 | 16°C | 6°C | 27°C 1991 | -1°C 1993 | 16% |
| May 28 | 16°C | 6°C | 27°C 1991 | -3°C 1992 | 15% |
| May 29 | 16°C | 5°C | 22°C 1991 | -4°C 2008 | 14% |
| May 30 | 16°C | 5°C | 23°C 2003 | -3°C 2007 | 13% |
| May 31 | 16°C | 5°C | 20°C 1995 | -2°C 2008 | 12% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (GMT-3).
- May 1
- sunrise 7:49 AM, sunset 6:28 PM
- May 31
- sunrise 8:12 AM, sunset 6:07 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.