May Summary

Below average temperature and rainfall. Coldest May since 2009.

  • May was below my average temperature of 9.4C with 8.3C, the coldest since 2009 when the average temperature was 7.5C.
    • The warmest May was 2007 with 11.6C, the coolest, 2001 and 2009 with 7.5C.
    • The warmest temperature was 19.1C, only the second May in my records not to reach 20C.
    • The coldest temperature was -2.0C. The lowest May temperature I've recorded was in 2001 with -6.2C.
    • Four air frosts were recorded (air temperature 0C or below) equalling my average.
    • One day failed to reach or exceed 10C, my average is 3
    • Just five days reached or exceeded 15C, my average is 11.
    • No days reached or exceeded 20C, my average is 3.
    • Wind run was 89% of my average of 3788km with 3367km. The windiest May I've recorded was 2009 with 5291km. The least windy May was 2003 with 3185km.
  • The barometer recorded above average pressure for the month with 1017.7hPa. My average is 1011.4hPa.
  • Rainfall was 61% of my average expected total of 82mm with 50mm. 2017 rainfall is still above my long term average.
    • The driest May is 2015 with 12.5mm, the wettest is 2009 with 193mm.
May 2017 Summary
Temperature
Mean 8.3 C
Mean Maximum 13.3 C
Mean Minimum 3.8 C
Maximum High 19.1 C (3rd)
Maximum Low 8.7 C (7th & 11th)
Minimum High 9.0 (20th)
Minimum Low -2.0 C (22nd)
Wind Speed and Direction
Maximum Gust 62 km/h (18th)
Mean 4.7 km/h
Wind Run 3367 km
Max Daily Windrun 278 km (20th)
Prevailing Direction East North East
Barometer
Maximum 1031.8 hPa (21st and 22nd)
Minimum 994.9 hPa (19th)
Mean 1017.7 hPa
Max Daily Change -17.2 hPa (11th)
Rainfall
Days with Measured Rainfall
(0.5mm or more)
16
Max Daily Rainfall 10.5 mm (18th)
Monthly Rainfall 50.0 mm
Humidity
Maximum 100 % (Several days)
Minimum 50 % (20th)

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 2.2 12.4 6.5 3.9 26 88 South Sth West 1.0 5.0 1011.3 1020.1 +8.8  
Morning showers clearing and cloud breaking and clearing by afternoon. Light southerly winds.
2 1.7 14.7 8.8 6.4 34 146 East Nth East 0 0 1009.8 1019.8 -10.0  
Light morning frost. Sunny with NE winds, high cloud increasing in the afternoon.
3 7.4 19.1 12.4 6.3 45 144 East Nth East 1.0 9.0 999.5 1009.6 -10.1  
Mostly cloudy with NE winds turning mild northerly in the afternoon. Light rain later in the afternoon and a a gusty southerly with squally showers in the evening.
4 1.0 14.8 7.2 4.8 35 110 South Sth West 0 0 1007.8 1017.7 +9.9  
Cloud increasing in the afternoon with a few spots of rain, cool southerly winds.
5 0.8 15.7 7.0 1.2 17 26 East Nth East 0 0 1018.1 1026.5 +8.4  
Sunny with NE breezes in the afternoon.
6 1.9 15.1 8.0 2.8 30 63 East Nth East 0 0 1026.2 1029.5 +3.3  
Clear and sunny with a cool NE wind.
7 8.7 13.6 10.8 4.1 22 92 East Nth East 0.5 0.5 1026.5 1030.4 -3.9  
Overcast with drizzle at times, cool NE wind.
8 6.8 15.8 10.7 4.0 22 91 East Nth East 0 0 1019.9 1026.4 -6.5  
Some cloud but mostly sunny with light NE winds.
9 3.1 13.8 8.9 4.4 23 100 East Nth East 0 0 1021.9 1024.9 +3.0  
Overcast until early afternoon then cloud breaking. Cool NE winds.
10 7.4 10.9 9.3 2.1 19 47 East Nth East 0 0 1023.0 1028.3 -5.3  
Fog lifting a little in the afternoon but returning later. Light breezes tending NE.
11 8.7 14.7 10.7 3.5 24 80 East Nth East 0.5 1.5 1005.6 1022.8 -17.2  
Morning mist and drizzle, showers around midday then sunny for a while before becoming overcast again with a cool southerly change later in the afternoon.
12 3.6 11.7 8.2 3.3 28 74 South Sth West 0.5 1.0 1010.2 1020.6 +10.4  
Overcast with showers morning and evening, cool southerly winds.
13 2.9 12.5 7.7 1.3 14 30 South Sth West 0.5 1.0 1020.7 1025.0 +4.3
Overcast in the morning with showers. Cloud breaking from midday to a sunny afternoon. Light breezes tending southerly.
14 -0.6 13.2 5.5 1.9 16 43 West 0.5 0.5 1023.5 1026.5 +3.0
Morning frost. Few clouds but mostly sunny with light breezes tending westerly.
15 0.2 14.0 7.0 3.8 24 87 East Nth East 0 0 1023.8 1027.2 -3.4  
Morning frost. Sunny with light NE winds.
16 6.4 14.8 10.0 3.2 22 73 East Nth East 0 0 1017.8 1024.4 -6.6  
Overcast with variable breezes tending NE.
17 6.5 13.5 9.4 4.3 24 98 South Sth West 0.5 5.0 1004.1 1017.8 -13.7  
Overcast with showers morning and evening. Light NE winds turning southerly from late afternoon.
18 4.7 13.1 9.4 11.0 62 252 South Sth WEst 1.5 10.5 997.5 1007.8 -10.3  
Morning rain clearing early morning and cloud breaking in the afternoon with southerly winds turning NE and dying away. A strong cold southerly change with a period of rain in the evening.
19 -0.2 13.2 6.0 4.9 54 111 East Nth East 0.5 5.0 994.9 1008.4 -13.1  
Morning frost then a sunny day with light NE breezes. A strong cold southerly arriving in the evening with a period of rain.
20 0.1 9.0 4.9 12.1 48 278 West 0.5 4.5 1003.1 1018.7 +15.6  
Early showers clearing by dawn to a mostly sunny but cold day with a few clouds at times and fresh cold southerly winds. Further showers in the evening.
21 -0.3 11.4 6.0 8.7 44 199 South Sth West 0 0 1019.1 1031.8 +12.7  
Morning cloud breaking and clearing during the afternoon and the cold southerly wind dying away.
22 -2.0 11.4 4.7 4.2 29 96 East Nth East 0.5 0.5 1019.3 1031.8 -12.5  
Morning frost, sunny with some high cloud in the afternoon, cool NE winds.
23 5.3 15.7 9.4 2.6 28 58 East Nth East 0 0 1008.6 1019.1 -10.5  
Overcast with a not'west arch cloud, light winds with mild northerly winds from late morning.
24 7.9 14.3 9.9 2.5 17 57 East Nth East 0 0 1017.1 1022.2 +5.1  
Morning cloud breaking to a mostly sunny afternoon with light NE winds.
25 4.3 13.0 9.1 6.2 33 141 East Nth East 0 0 1016.2 1021.7 -5.5  
Sunny with a few clouds, cool NE winds.
26 2.4 13.0 6.9 3.7 21 85 East Nth East 0 0 1009.2 1016.0 -6.8
Fog lifting and clearing late morning. Some high cloud, cool NE winds.
27 7.4 11.3 9.4 6.3 31 142 South Sth West 0.5 1.5 1007.7 1023.0 +15.3  
Overcast with light rain and drizzle from late morning, clearing in the evening. Southerly winds.
28 0.4 11.2 6.5 4.5 24 103 East Nth East 0.5 0.5 1021.0 1024.0 -3.0  
Morning fog clearing by mid morning to a sunny day with a few clouds. Cool NE wind.
29 7.7 11.3 9.8 9.0 30 205 East Nth East 0.5 1.5 1016.7 1021.9 -5.2  
Overcast with drizzle from mid afternoon, cool NE winds.
30 5.8 13.1 9.7 7.0 30 161 East Nth East 0 0 1009.8 1016.6 -6.8  
Morning fog clearing to a mostly sunny day but cloud increasing from mid afternoon. NE wind.
31 5.9 11.1 8.4 3.2 18 73 South Sth West 0 0 1012.1 1019.5 +7.4  
Overcast and cool with a few spots of drizzle, light southerly breezes.


May 2017  Temperature Graph
May 2017 Wind Dir Graph
May 2017 Wind Dir Graph
May 2017 Wind Speed Graph
May 2017 Rainfall Graph
May 2017 Barograph
May 2017 Humidity Graph