Rolleston Weather in May
Average highs run from 16°C on May 1 to 12°C on May 31, and lows from 7°C to 4°C. Normal precipitation for the month is 74 mm over about 12 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
- 14°C
- Average low
- 5°C
- Precipitation
- 74 mm
- Reanalysis high
- 24°CMay 12, 2013
- Reanalysis low
- -1°CMay 30, 1992
- Daylight
- 10 h 11 min to 9 h 10 min
- Cloud cover
- 64%
- Humidity
- 84%
- Dew point
- 6°C
- Wind
- 14.0 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 | 16°C | 7°C | 21°C 2020 | 2°C 1991 | 38% |
| May 2 | 16°C | 6°C | 21°C 2016 | 1°C 2009 | 39% |
| May 3 | 16°C | 6°C | 21°C 2016 | 2°C 1993 | 40% |
| May 4 | 16°C | 6°C | 22°C 2002 | 1°C 2009 | 40% |
| May 5 | 16°C | 6°C | 21°C 1997 | 1°C 2003 | 40% |
| May 6 | 15°C | 6°C | 20°C 2005 | 0°C 2008 | 39% |
| May 7 | 15°C | 6°C | 22°C 2016 | 0°C 2008 | 40% |
| May 8 | 15°C | 6°C | 21°C 1998 | 2°C 2005 | 41% |
| May 9 | 15°C | 6°C | 22°C 2002 | 0°C 2005 | 42% |
| May 10 | 15°C | 6°C | 22°C 2002 | 1°C 1995 | 42% |
| May 11 | 15°C | 6°C | 22°C 2016 | 0°C 2009 | 42% |
| May 12 | 15°C | 6°C | 24°C 2013 | 0°C 2009 | 43% |
| May 13 | 15°C | 6°C | 21°C 2001 | 1°C 1992 | 42% |
| May 14 | 15°C | 6°C | 20°C 1999 | 0°C 2000 | 43% |
| May 15 | 14°C | 5°C | 21°C 1999 | 1°C 1994 | 43% |
| May 16 | 14°C | 5°C | 19°C 1999 | 0°C 1992 | 44% |
| May 17 | 14°C | 5°C | 18°C 2007 | 1°C 2000 | 45% |
| May 18 | 14°C | 5°C | 20°C 2007 | 1°C 1996 | 46% |
| May 19 | 14°C | 5°C | 17°C 2014 | 2°C 2017 | 46% |
| May 20 | 13°C | 5°C | 21°C 2003 | 0°C 2017 | 46% |
| May 21 | 13°C | 5°C | 19°C 2003 | 1°C 2020 | 48% |
| May 22 | 13°C | 5°C | 19°C 1999 | 0°C 2017 | 47% |
| May 23 | 13°C | 5°C | 19°C 1999 | 0°C 1992 | 45% |
| May 24 | 13°C | 5°C | 18°C 1998 | 1°C 2001 | 44% |
| May 25 | 13°C | 5°C | 17°C 2011 | 1°C 2002 | 44% |
| May 26 | 13°C | 5°C | 18°C 1999 | 0°C 2002 | 45% |
| May 27 | 13°C | 5°C | 19°C 1999 | -1°C 2014 | 44% |
| May 28 | 12°C | 4°C | 19°C 1999 | 0°C 1998 | 46% |
| May 29 | 12°C | 4°C | 18°C 1998 | -1°C 2015 | 45% |
| May 30 | 12°C | 4°C | 19°C 2007 | -1°C 1992 | 45% |
| May 31 | 12°C | 4°C | 19°C 2003 | -1°C 2001 | 44% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (GMT+12).
- May 1
- sunrise 7:22 AM, sunset 5:33 PM
- May 31
- sunrise 7:53 AM, sunset 5:03 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.