May Rainfall
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| May McLaren Vale (Pirramimma) Weather Station. |
The May recorded rainfall for McLaren Vale was close to median rainfall. The May rainfall records of the last 10 years show May to be a reliable month. Only May 2005 'missed out' and since 2006 the recorded rainfall has been close to the mean.
The May 2012 rainfall total in Adelaide (Kent Town) was slightly
above average, with 62.8 mm received on 13 rain days. This is compared
to the long-term average of 60.0 mm on 14 rain days, with a median
rainfall of 59.8 mm. By comparison, during May 2011, 61.8 mm was
recorded.
The wettest periods for the Adelaide and Hills region occurred during
the first and last week of May. Much of the rainfall observed for the
month came from cold frontal systems, followed by moist south to
southwesterly airstreams being directed across South Australia. Despite
the first week of May being wet, rainfall remained well below average
across the Adelaide region up until the 23rd when a low pressure system
with an associated cold front crossed the southern coastal regions of
the State. This event produced significant totals in the Adelaide Hills
in the persistent moist southerly airstream that followed.
Temperature
Both maximum and minimum temperatures were mostly below average across
the Adelaide Plains during May 2012, though tending to slightly above
average at some locations in the Adelaide Hills. With respect to minimum
(over night) temperatures, the coldest periods occurred between the
15th and 20th as a high pressure system maintained mostly fine and clear
conditions across the State. The coldest period, with respect to
daytime maximum temperatures, occurred in the latter period of the month
when maximum temperatures were up to 6 °C below average in the wake of
the passage of a cold frontal system.
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