A typical May from my records;

  • An average temperature of 9.3C.
    • Maximum temperature expected about 22C.
    • Minimum temperature expected about -2C.
    • Four Air frosts (temperature 0C or below) are expected.
    • Three days fail to reach 10C.
    • Eleven days are expected to reach or exceed 15C
    • Three days are expected to reach or exceed 20C.
  • Wind run would be around 3750km with the windiest day expected to have a wind run of 320km.
    • Maximum wind gust would be in the region of 57km/h.
  • There would be rain on 13 days with the monthly total of around 80mm.

Rain totals for the month and year along with temperature and wind comparisons can be found here.

May Daily Observations
TemperatureWindRainfallBarometer
DateMinMaxMeanMean
(Km/h)
Gust
(Km/h)
Run (km)Prevailing Dir10 Minute Max (mm)Total (mm)Min (hPa)Max (hPa)Change (hPa)
1 5.5 17.6 10.7 1.1 20 25 South Sth West 0 0 1002.3 1012.9 +10.6
Sunny and mild in the afternoon with light breezes tending southerly.
2 6.1 17.0 10.6 1.0 24 22 East Nth East 0 0 1013.0 1021.4 +8.4
Few clouds but mostly sunny with light winds tending NE.
3 5.7 16.3 10.6 4.3 27 99 East Nth East 0 0 1021.1 1025.7 +4.6
Some cloud but mostly sunny, cool NE wind.
4 10.4 15.9 12.6 9.4 34 214 East Nth East 0 0 1023.3 1026.4 -3.1
mostly cloudy with some sunny intervals, cool NE wind.
5 10.8 17.5 14.0 6.1 31 139 East Nth East 0 0 1009.0 1023.4 -14.4
Variable cloud with a NE wind, cool at times.
6 7.3 21.1 13.6 3.7 36 85 North Nth East 0 0 1004.7 1011.9 -7.2
Some high cloud in the afternoon but mostly sunny and mild with northerly winds from late morning.
7 6.0 20.8 12.4 1.8 24 41 East Nth East 0 0 1009.4 1014.1 +4.7
Mild from late morning, high cloud increasing to overcast in the afternoon. Light winds tending NE.
8 6.6 18.6 12.8 3.1 34 70 East Nth East 0 0 1009.6 1014.7 -5.1
Mostly cloudy with mild northerly winds from midday.
9 5.4 19.1 12.7 5.0 35 114 East Nth East 0 0 1012.1 1025.5 +13.4
Sunny with a few high clouds, NE winds freshening in the evening.
10 7.6 20.7 12.6 3.2 24 73 East Nth East 0 0 1019.2 1023.9 -4.7
Variable cloud but mostly sunny from late morning. Variable winds turning NE in the afternoon.
11 7.1 17.7 12.9 5.8 34 131 East Nth East 0 0 1000.1 1019.6 -19.5
Variable cloud, NE wind.
12 9.4 14.5 11.4 7.4 32 170 South Sth West 0.5 1.0 1004.9 1025.4 +20.5
Early light rain and drizzle clearing and a few sunny intervals around midday. Cloud increasing in the afternoon with a change to NE winds in the evening.
13 8.7 12.4 10.0 4.9 23 112 East Nth East 0.5 6.0 1017.5 1025.0 -7.5
Overcast and cool with NE winds turning southerly with drizzle from mid afternoon. 
14 8.3 13.7 10.1 1.9 16 43 East Nth East 0.5 1.0 1020.4 1023.3 +2.7
Early drizzle and mist clearing to a dry but cool day with light winds tending NE.
15 9.6 12.6 10.7 1.2 15 27 West 0.5 9.0 1004.4 1021.9 -17.5
Overcast and misty with light rain and drizzle. Light breezes tending westerly.
16 6.1 10.3 8.7 3.9 45 90 West 0.5 5.5 996.5 1004.4 -7.9
Overcast with morning fog. A period of rain in the afternoon and later in the evening. Westerly breezes turning southerly in the afternoon.
17 4.3 13.1 8.1 3.5 29 79 East Nth East 0.5 2.5 1000.0 1005.6 -5.6
Showers clearing before dawn with cloud breaking and clearing to a sunny day with cool NE winds from afternoon.
18 2.7 18.8 9.3 1.6 21 36 North Nth West 0 0 1000.9 1005.5 +4.6
Sunny and mild in the afternoon with northerly breezes.
19 3.7 19.8 10.1 2.3 24 54 North Nth West 0 0 997.1 1003.6 -6.5
Sunny with some high cloud, winds turning mild northerly from late morning.
20 3.0 18.1 9.5 5.0 37 114 North Nth East 0.5 2.0 984.1 1001.4 -17.3
Mostly cloudy with mile northerly winds from early afternoon.
21                        
 
22                        
 
23                        
 
24                        
 
25                        
 
26                      
 
27                        
 
28                        
 
29                        
 
30                        
 
31