My May
Temperature: As discussed in the media, May 2007 was the warmest May since records began as reported by NIWA and the warmest May I've recorded. My mean temperature for the month was 11.6C. The highest temperature was 22.6C on the 1st and the lowest was 1.5C on the 30th. No air frost (air temperature below 0C) was recorded. 2005 is the only other May had no air frost recorded. The next warmest was May 2004 with a mean temperature of 10.5C. The coldest May I've recorded was 2001 with a mean temperature of 7.5C.
Wind: The monthly wind run of 3977km is near the average of 3922km for the 6 years I have wind data for. Prevailing wind direction was north east recorded 61% of the month, south 14%, north 8% and nor'west 6%. Maximum gust was 50km/h from the west on the 21st. The windiest May I've recorded is 2004 with 4483km of wind and the least was May 2003 with 3185km.
Rainfall: The driest May I have recorded with just 27% of my May average of 77.1mm. The wettest day was the 2nd with 15.6mm. The wettest May I've recorded was 2006 with 159.4mm.
Barometer: The highest pressure for the month was recorded on the 8th with 1032.0hPa, the lowest 995.4hPa on the 16th. Mean pressure was 1013.9hPa, compared to 1013.6hPa in May 2006, the only other year I have barometer data for.
| May 2007 Summary Temperature |
|
|---|---|
| Mean | 11.6C |
| Mean Maximum | 16.7C |
| Mean Minimum | 6.7C |
| Maximum High | 22.6C (1st) |
| Maximum Low | 12.1C (22nd) |
| Minimum High | 12.0C (28th) |
| Minimum Low | 1.5C (13th) |
| Wind Speed and Direction | |
| Maximum Gust | 50 km/h (21st) |
| Mean | 5.5 km/h |
| Wind Run | 3977 km |
| Max Daily Windrun | 278 km (13th) |
| Prevailing Direction | North East |
| Barometer | |
| Maximum | 1032.0 hPa (8th) |
| Minimum | 995.4 hPa (16th) |
| Mean | 1013.9 hPa |
| Max Daily Change | -17.3 hPa (9th) |
| Rainfall | |
| Days with Measured Rainfall (Greater than 0.2mm) | 3 |
| Max Daily Rainfall | 15.6 mm (2nd) |
| Monthly Rainfall | 21.2 mm |
| Humidity | |
| Maximum | 97 % (Several Days) |
| Minimum | 33 % (16th) |
| 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 | 9.2 | 12.5 | 10.3 | 7.6 | 24 | 180 | South | 0.6 | 3.4 | 1002.0 | 1005.2 | +3.2 |
| Overcast and dull with morning and evening light rain or drizzle. Light southerly winds. | ||||||||||||
| 2 | 8.8 | 12.0 | 10.2 | 5.8 | 37 | 136 | South | 1.0 | 15.6 | 1000.0 | 1008.2 | +8.2 |
| Overcast with low cloud. Rain and drizzle for much of the day, cool southerly winds from late afternoon. | ||||||||||||
| 3 | 4.9 | 13.1 | 8.9 | 5.1 | 21 | 121 | South | 0.4 | 1.0 | 1008.5 | 1019.9 | +11.4 |
| Early showers clearing by dawn. Cloud breaking in the afternoon, NE wind in the evening. | ||||||||||||
| 4 | 9.1 | 14.3 | 11.3 | 11.7 | 39 | 278 | North East | 0 | 0 | 1013.9 | 1020.0 | -6.1 |
| Some cloud and with sun breaking through at times. Fresh cool NE wind. | ||||||||||||
| 5 | 8.6 | 22.6 | 14.4 | 4.1 | 30 | 97 | North East | 0 | 0 | 1010.1 | 1013.9 | -3.8 |
| Cloud increasing for a time in the morning with a few sopts of rain. Cloud clearing and mild north to nor'west breezes in the afternoon. | ||||||||||||
| 6 | 12.1 | 16.2 | 13.7 | 7.0 | 30 | 165 | North East | 0 | 0 | 1010.6 | 1020.0 | +9.4 |
| Variable high cloud with mild north to nor'west winds in the morning turning to cooler NE winds in the afternoon. | ||||||||||||
| 7 | 9.9 | 20.1 | 14.0 | 4.5 | 29 | 106 | North East | 0 | 0 | 1010.2 | 1025.7 | +15.5 |
| Some high cloud but mostly sunny. Light breezes in the morning, cooler NE winds in the afternoon. | ||||||||||||
| 8 | 4.4 | 16.0 | 10.4 | 4.9 | 24 | 116 | North East | 0 | 0 | 1026.0 | 1032.0 | +6.0 |
| Sunny with some haze, NE winds in the afternoon. | ||||||||||||
| 9 | 10.3 | 15.6 | 12.3 | 5.9 | 25 | 141 | North East | 0 | 0 | 1011.4 | 1028.7 | -17.3 |
| Cool and mostly overcast with high cloud. NE winds. Maximum temperature for the day recorded at 11:10pm with a northerly wind. | ||||||||||||
| 10 | 9.6 | 18.6 | 13.8 | 4.7 | 23 | 111 | North East | 0 | 0 | 1009.4 | 1010.5 | +5.6 |
| Variable broken cloud, north to NE winds. | ||||||||||||
| 11 | 7.9 | 17.3 | 11.2 | 5.3 | 43 | 124 | South | 0.2 | 0.2 | 997.8 | 1011.4 | -13.6 |
| Mostly overcast with high cloud in the morning with light winds from the west and north. A brief period of rain in the afternoon from the west then cloud clearing with light breezes. | ||||||||||||
| 12 | 3.5 | 16.3 | 10.1 | 1.9 | 25 | 46 | South | 0 | 0 | 1009.1 | 1016.7 | +7.6 |
| Morning cloud clearing to a sunny day with light southerly breezes. | ||||||||||||
| 13 | 3.2 | 15.1 | 9.3 | 4.5 | 30 | 107 | North East | 0 | 0 | 1013.5 | 1019.9 | +6.4 |
| Some morning cloud but mostly sunny with NE winds. | ||||||||||||
| 14 | 4.6 | 19.9 | 11.4 | 5.2 | 37 | 123 | South | 0 | 0 | 1004.5 | 1019.8 | -15.3 |
| Some morning mist. Morning cloud clearing to a sunny and mild day. NE winds easing after midday and southerly winds at night. | ||||||||||||
| 15 | 6.3 | 12.9 | 10.3 | 5.7 | 31 | 135 | North East | 0 | 0 | 1007.3 | 1015.3 | -8.0 |
| Low morning cloud lifting and breaking in the afternoon with some sunny intervals. Cool NE winds. | ||||||||||||
| 16 | 5.6 | 22.4 | 13.3 | 7.3 | 44 | 173 | West | 0 | 0 | 995.4 | 1007.0 | +11.6 |
| Clear and sunny with mild west to nor'west winds, gusty at times. | ||||||||||||
| 17 | ||||||||||||
| No data as my weather station was not running. NE winds turning mild nor'west then light southerly later in the afternoon. Mostly sunny with some high cloud. | ||||||||||||
| 18 | 6.1 | 19.3 | 11.6 | 3.4 | 20 | 82 | North East | 0 | 0 | 1010.8 | 1023.2 | +12.4 |
| Mostly sunny, high cloud increasing in the afternoon. | ||||||||||||
| 19 | 9.8 | 14.1 | 11.6 | 7.8 | 37 | 185 | North East | 0 | 0 | 1019.4 | 1024.9 | -5.5 |
| Broken low cloud, cool NE winds. | ||||||||||||
| 20 | 8.1 | 21.6 | 14.8 | 7.8 | 39 | 180 | North | 0 | 0 | 1004.6 | 1019.5 | -14.9 |
| Morning cloud clearing to a sunny afternoon. Mild with north to NE winds. | ||||||||||||
| 21 | 11.5 | 20.3 | 17.2 | 7.4 | 50 | 174 | West | 0 | 0 | 1004.7 | 1016.5 | +11.8 |
| Mild gusty west to nor'west winds from early morning keeping the temperature at around 17C for much of the day. Mostly overcast with high cloud. | ||||||||||||
| 22 | 6.1 | 14.9 | 11.7 | 7.9 | 31 | 186 | North East | 0 | 0 | 1012.7 | 1023.9 | -11.2 |
| Sunny with some cloud in the morning. Becoming overcast with cooler in the afternoon. NE winds. | ||||||||||||
| 23 | 10.2 | 20.8 | 14.2 | 9.2 | 35 | 217 | North East | 0 | 0 | 1000.1 | 1012.1 | -12.0 |
| Overcast in the morning and early afternoon with NE winds. Cloud breaking mid afternoon with winds changing to mild west to nor'west. | ||||||||||||
| 24 | 6.7 | 17.9 | 12.6 | 3.9 | 39 | 93 | West | 0 | 0 | 1003.6 | 1010.3 | +6.7 |
| Mostly overcast with high cloud with gusty west to nor'west winds in the morning easing and turning NE for a time. Light breezes in the afternoon. | ||||||||||||
| 25 | 2.8 | 15.2 | 9.6 | 4.4 | 31 | 104 | North East | 0 | 0 | 1008.8 | 1015.4 | -6.6 |
| Sunny with high cloud increasing from mid afternoon. NE winds | ||||||||||||
| 26 | 4.8 | 14.8 | 10.2 | 4.7 | 34 | 109 | North East | 0 | 0 | 1005.5 | 1014.6 | -9.1 |
| Some high cloud by mostly sunny with NE winds. | ||||||||||||
| 27 | 4.9 | 15.4 | 9.9 | 4.5 | 34 | 108 | South | 0 | 0 | 1004.0 | 1020.6 | +16.6 |
| Clear and sunny with southerly winds from late morning. | ||||||||||||
| 28 | 4.8 | 15.1 | 9.2 | 2.6 | 21 | 62 | North East | 0 | 0 | 1020.5 | 1026.2 | +5.7 |
| Sunny with increasing high cloud in the afternoon. Light breezes picking up from the NE late afternoon. | ||||||||||||
| 29 | 1.9 | 17.2 | 9.3 | 2.4 | 24 | 58 | South | 0 | 0 | 1021.7 | 1027.0 | +5.3 |
| Morning mist. Some high cloud. Southerly winds in the morning, light breezes in the afternoon. | ||||||||||||
| 30 | 1.5 | 16.5 | 9.1 | 5.7 | 31 | 134 | North East | 0 | 0 | 1021.0 | 1029.9 | -8.9 |
| Clear and sunny with NE winds | ||||||||||||
| 31 | 5.6 | 17.8 | 12.2 | 2.8 | 30 | 66 | North East | 0 | 0 | 1014.8 | 1020.8 | -6.0 |
| Overcast with high wave or orographic cloud. Winds from the nor'west to NE during the day. | ||||||||||||
