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 | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Temperature | Wind | Rainfall | Barometer | |||||||||
Date | Min | Max | Mean | Mean (Km/h) | Gust (Km/h) | Run (km) | Prevailing Dir | 10 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. |