December had average temperature and rainfall and was less windy.
- December was near my average temperature of 15.6C with 15.5C.
- The warmest December is 2010 with 17.4C, the coolest 2004 with 12.7C.
- The coldest temperature was 3.5C. The lowest December temperature I've recorded was in 2006 with 1.3C.
- Twenty days reached or exceeded 20C, my average is 18.
- Nine days reached or exceeded 25C, my average is 7.
- Three days reached or exceeded 30C, my average is 1. 2012 also had 3 days at or over 30C.
- One day reached or exceeded 35C, only December 2010 has also recorded a temperature over 35C
- Wind run was 85% of my average of 5895km with 5004km.
- The barometer recorded above average pressure for the month with 1011.9hPa. My average is 1011.7hPa.
- Rainfall equalled my average expected total of 57.7mm with 57mm.
- The driest is 2003 with 2mm, the wettest is 2003 with 138mm.
| December 2015 Summary Temperature | |
|---|---|
| Mean | 15.5 C |
| Mean Maximum | 23.3 C |
| Mean Minimum | 9.3 C |
| Maximum High | 35.2 C (21st) |
| Maximum Low | 17.1 C (2nd) |
| Minimum High | 16.6 C (17th) |
| Minimum Low | 3.5 C (23rd) |
| Wind Speed and Direction | |
| Maximum Gust | 52 km/h (27th) |
| Mean | 7.4 km/h |
| Wind Run | 5004 km |
| Max Daily Windrun | 351 km (27th) |
| Prevailing Direction | East North East |
| Barometer | |
| Maximum | 1026.7 hPa (1st) |
| Minimum | 990.9 hPa (12th) |
| Mean | 1011.9 hPa |
| Max Daily Change | +16.0 hPa (13th) |
| Rainfall | |
| Days with Measured Rainfall (0.5mm or more) |
11 |
| Max Daily Rainfall | 17.5 mm (17th) |
| Monthly Rainfall | 57.0 mm |
| Humidity | |
| Maximum | 99 % (14th) |
| Minimum | 24 % (5th) |
| December 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 | 13.5 | 19.5 | 16.1 | 11.7 | 42 | 267 | East Nth East | 0 | 0 | 1019.1 | 1026.7 | -7.6 |
| Few sunny intervals, low cloud morning and later in the afternoon, NE winds fresh for a time in the afternoon. | ||||||||||||
| 2 | 17.1 | 34.6 | 24.6 | 6.5 | 43 | 145 | East Nth East | 0 | 0 | 1014.5 | 1019.9 | -5.4 |
| Sunny with a few clouds. NE winds turning very warm NW from mid afternoon. Second warmest December temperature I've recorded. Warmest is currently 18 Dec 2010 with 35.1C. | ||||||||||||
| 3 | 11.6 | 31.9 | 19.6 | 6.4 | 35 | 134 | East Nth East | 1.5 | 3.5 | 1007.0 | 1016.0 | +9.7 |
| Broken cloud in the morning with warm northerly winds from mid morning. Overcast in the afternoon. A southerly change late afternoon with showers. | ||||||||||||
| 4 | 10.2 | 22.2 | 16.0 | 8.6 | 34 | 197 | East Nth East | 0 | 0 | 1011.1 | 1016.7 | -5.6 |
| Some high cloud but mostly sunny with NE winds. | ||||||||||||
| 5 | 9.4 | 29.2 | 17.3 | 7.9 | 47 | 153 | South | 0 | 0 | 1001.8 | 1010.9 | -9.1 |
| Morning cloud breaking, light southerly winds turning warm Northwest from early afternoon. A cool southerly change in the evening with a few spots of rain. | ||||||||||||
| 6 | 7.8 | 17.5 | 11.3 | 6.8 | 28 | 142 | South | 0.5 | 2.5 | 1009.8 | 1013.3 | +3.5 |
| Showers in the morning with light southerly wind. Cloud breaking in the afternoon with wind turning NE | ||||||||||||
| 7 | 6.2 | 23.1 | 13.1 | 5.0 | 33 | 102 | South | 0.5 | 1.0 | 1003.9 | 1011.2 | +7.3 |
| Northerly breezes turning southerly later in the morning. Cloud increasing in the afternoon with showers till evening. | ||||||||||||
| 8 | 5.5 | 22.1 | 14.1 | 7.1 | 35 | 147 | South | 0 | 0 | 1008.6 | 1016.7 | +8.1 |
| Variable cloud, mostly sunny but cloud thickening later in the afternoon. Southerly winds from mid morning | ||||||||||||
| 9 | 10.4 | 21.2 | 14.0 | 8.7 | 31 | 196 | East Nth East | 0 | 0 | 1011.5 | 1018.2 | -6.7 |
| Morning cloud breaking to a sunny afternoon, southerly winds turning NE from midday. | ||||||||||||
| 10 | 11.8 | 30.8 | 20.4 | 8.5 | 35 | 180 | East Nth East | 0 | 0 | 1000.4 | 1011.4 | -11.0 |
| Some cloud but a mostly sunny and warm afternoon with NE winds turning NW from early afternoon. A cooler southerly change in the evening but remaining dry. | ||||||||||||
| 11 | 9.6 | 19.0 | 14.5 | 12.0 | 49 | 273 | East Nth East | 0 | 0 | 1006.3 | 1010.9 | -4.6 |
| Sunny morning, overcast by early afternoon. Fresh NE wind. | ||||||||||||
| 12 | 13.5 | 24.1 | 17.4 | 11.6 | 37 | 265 | East Nth East | 0 | 0 | 990.9 | 1006.7 | -15.8 |
| Mostly cloudy with NE winds turning NW in the evening. | ||||||||||||
| 13 | 5.6 | 19.9 | 13.4 | 8.0 | 50 | 172 | North Nth West | 5.0 | 16.5 | 993.8 | 1009.8 | +16.0 |
| Two thunder storms in the afternoon, the first with heavy rain and hail dropping the temperature to 5.6C at 1:50pm. The second with just a few hail stones and less heavy rain. Report in the Press | ||||||||||||
| 14 | 3.9 | 25.6 | 15.7 | 3.1 | 23 | 70 | East Nth East | 0 | 0 | 1005.9 | 1010.0 | -4.1 |
| Few clouds but mostly sunny, light NE winds. | ||||||||||||
| 15 | 10.8 | 27.3 | 16.7 | 7.7 | 45 | 165 | East Nth East | 0.5 | 0.5 | 1003.2 | 1010.0 | -6.8 |
| Few clouds but mostly sunny with NE winds. Cloud increasing in the evening with a southerly change and a few showers. | ||||||||||||
| 16 | 7.4 | 18.2 | 11.3 | 2.6 | 21 | 44 | South | 1.0 | 9.5 | 1007.2 | 1009.8 | +2.6 |
| Showers clearing in the afternoon with cloud breaking. Light winds tending southerly. | ||||||||||||
| 17 | 7.1 | 16.6 | 10.9 | 7.5 | 33 | 131 | South | 1.5 | 17.5 | 1009.0 | 1013.3 | +4.3 |
| Rain easing to showers by dawn and clearing by midday, southerly winds dying away in the evening. | ||||||||||||
| 18 | 3.9 | 23.3 | 13.0 | 4.2 | 26 | 95 | East Nth East | 0.5 | 0.5 | 1007.9 | 1014.9 | -6.1 |
| Some high cloud but mostly sunny with light southerly winds in the morning turning NE in the afternoon. | ||||||||||||
| 19 | 8.8 | 19.2 | 13.1 | 5.7 | 29 | 112 | South | 0 | 0 | 1009.8 | 1017.4 | +7.6 |
| Overcast but brighter and warmer in the afternoon, southerly winds turning NE in the evening. | ||||||||||||
| 20 | 10.0 | 17.5 | 14.1 | 10.1 | 40 | 230 | East Nth East | 0 | 0 | 1012.2 | 1017.5 | -5.3 |
| Overcast with a few spots of rain at times. Cloud clearing from mid afternoon but returning in the evening. Fresh NE wind. | ||||||||||||
| 21 | 13.8 | 35.2 | 23.6 | 7.8 | 43 | 176 | East Nth East | 0 | 0 | 1005.3 | 1012.9 | -7.6 |
| Warmest December day exceeding Metservices 1975 record of 35.4 with 36.1. Overcast in the morning, cloud breaking in the afternoon with NE winds turning very warm nor'west later in the afternoon. Report in the Press. | ||||||||||||
| 22 | 8.8 | 22.2 | 14.7 | 5.2 | 43 | 103 | South | 1.0 | 3.5 | 1002.7 | 1017.4 | +14.7 |
| Maximum temperature recorded at midnight, getting colder during the day with NW winds turning southerly mid morning. A period of rain in the afternoon clearing in the evening. | ||||||||||||
| 23 | 3.5 | 21.3 | 11.8 | 5.0 | 30 | 113 | East Nth East | 0 | 0 | 1015.2 | 1019.3 | -4.1 |
| Variable cloud, sunny later in the afternoon. Light southerly winds turning NE from early afternoon. | ||||||||||||
| 24 | 11.8 | 26.0 | 16.8 | 5.0 | 27 | 104 | South | 0 | 0 | 1012.2 | 1016.9 | +4.7 |
| Variable cloud but mostly sunny, winds tending southerly. | ||||||||||||
| 25 | 10.4 | 26.9 | 17.1 | 4.4 | 27 | 99 | East Nth East | 0 | 0 | 1014.5 | 1021.1 | +6.6 |
| Mostly sunny with light variable breezes in the morning turning NE in the afternoon. | ||||||||||||
| 26 | 8.8 | 24.3 | 16.3 | 5.0 | 26 | 113 | East Nth East | 0 | 0 | 1020.8 | 1024.9 | +4.1 |
| Few clouds, variable breezes in the morning turning NE in the afternoon. | ||||||||||||
| 27 | 13.1 | 18.6 | 15.6 | 15.3 | 52 | 351 | East Nth East | 0 | 0 | 1018.0 | 1024.8 | -6.8 |
| Cloud clearing during the morning with fresh to strong NE wind. | ||||||||||||
| 28 | 13.6 | 19.3 | 15.9 | 14.1 | 43 | 323 | East Nth East | 0 | 0 | 1011.3 | 1018.2 | -6.9 |
| Variable cloud with sunny intervals, fresh NE wind. | ||||||||||||
| 29 | 5.9 | 24.2 | 15.4 | 4.3 | 24 | 92 | East Nth East | 0 | 0 | 1003.6 | 1012.9 | -9.3 |
| Morning cloud clearing, mostly light NE winds. | ||||||||||||
| 30 | 5.1 | 19.2 | 12.0 | 7.4 | 37 | 134 | South | 0.5 | 1.5 | 1002.5 | 1016.1 | +13.6 |
| Cloud increasing from midday with light rain in the evening. Southerly winds dying out in the evening. | ||||||||||||
| 31 | 10.6 | 22.0 | 15.2 | 7.3 | 37 | 162 | East Nth East | 0.5 | 0.5 | 1016.4 | 1023.2 | +6.8 |
| Showers clearing before dawn. Morning cloud clearing, light breezes turning Ne from late morning. | ||||||||||||
