December 2006 Summary Temperature |
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Mean | 13.1 C |
Mean Maximum | 19.0 C |
Mean Minimum | 8.4 C |
Maximum High | 30.8 C (12th) |
Maximum Low | 13.4 C (26th) |
Minimum High | 10.9 C (31st) |
Minimum Low | 1.3 C (2nd) |
Wind Speed and Direction | |
Maximum Gust | 57 km/h (30th) |
Mean | 9.4 km/h |
Wind Run | 6877 km |
Max Daily Windrun | 490 km (22nd) |
Prevailing Direction | North East |
Barometer | |
Maximum | 1023.8 hPa (9th) |
Minimum | 992.3 hPa (27th) |
Mean | 1010.3 hPa |
Max Daily Change | +16.9 hPa (1st) |
Rainfall | |
Days with Measured Rainfall (Greater than 0.2mm) | 14 |
Max Daily Rainfall | 55.4 mm (20th) |
Monthly Rainfall | 135.8 mm |
Humidity | |
Maximum | 96 % (26th) |
Minimum | 21 % (12th) |
December Daily Observations | ||||||||||||
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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 | 3.9 | 14.9 | 8.8 | 5.9 | 32 | 139 | South | 0.8 | 2.8 | 998.9 | 1015.5 | +16.6 |
Low cloud and showers in the morning. Cloud breaking in the afternoon and clearing in the evening. | ||||||||||||
2 | 1.3 | 15.8 | 9.7 | 9.5 | 40 | 226 | North East | 0 | 0 | 1008.8 | 1015.6 | -6.8 |
Sunny for most of the day with cool fresh NE winds in the afternoon. High cloud increasing in the evening. | ||||||||||||
3 | 10.8 | 18.6 | 13.6 | 12.2 | 38 | 287 | North East | 0 | 0 | 1001.2 | 1009.2 | -8.0 |
Overcast with high cloud and NE winds, warmer in the afternoon with lighter winds. A southerly change in the evening with low cloud but remaining dry. | ||||||||||||
4 | 9.9 | 18.3 | 12.5 | 9.7 | 33 | 229 | South | 0.2 | 2.2 | 1004.1 | 1010.5 | +6.4 |
Overcast with low cloud and cool south west winds. Light rain and drizzle in the morning clearing to a mild and sunny afternoon. Cloud increasing in the evening and becoming cooler with a few spots of rain. | ||||||||||||
5 | 7.6 | 16.5 | 12.2 | 6.9 | 37 | 163 | South | 0 | 0 | 1010.8 | 1016.9 | +6.1 |
Variable cloud, mostly sunny in the afternoon. Cool southerly winds. | ||||||||||||
6 | 4.5 | 22.7 | 13.8 | 4.9 | 26 | 115 | North East | 0 | 0 | 1013.5 | 1017.2 | -3.7 |
Mostly clear and sunny with some patchy cloud. Southerly breezes in the morning, NE winds in the afternoon. High cloud increasing in the evening. | ||||||||||||
7 | 12.2 | 28.1 | 16.2 | 7.5 | 35 | 176 | North East | 0 | 0 | 1005.5 | 1013.3 | -7.8 |
Overcast with high cloud and NE winds in the morning. Cloud breaking in the afternoon with warm temperatures followed by a change to westerly then SW winds. | ||||||||||||
8 | 8.6 | 17.0 | 12.3 | 7.5 | 37 | 177 | South | 0.2 | 0.4 | 999.9 | 1006.9 | +7.0 |
Cloudy with a shower in the morning and southerly winds. Cloud breaking in the afternoon then increasing again in the evening with drizzle. Winds turning north to NE in the afternoon and evening. | ||||||||||||
9 | 7.3 | 13.4 | 10.0 | 12.6 | 44 | 297 | South | 1.6 | 11.8 | 1007.2 | 1023.8 | +16.6 |
Cold southerly winds with morning showers. Showers clearing and cloud breaking in the afternoon. Wind easing in the evening. | ||||||||||||
10 | 5.9 | 22.2 | 12.8 | 4.3 | 24 | 101 | North East | 0.4 | 0.6 | 1017.6 | 1023.8 | -6.2 |
High cloud increasing from morning. Light NE winds. | ||||||||||||
11 | 11.5 | 19.4 | 14.5 | 8.3 | 31 | 197 | North East | 0 | 0 | 1014.7 | 1022.6 | -7.9 |
Cloud breaking mid afternoon with NE winds. Hazy with high level smoke from the Australian bush fires. | ||||||||||||
12 | 11.4 | 30.8 | 19.3 | 10.8 | 51 | 255 | North East | 0 | 0 | 1001.3 | 1014.7 | -13.4 |
Smoke haze and thin high cloud in the morning clearing by early afternoon. Warm north to nor'west winds in the afternoon. The days maximum temperature equals this years maximum temperature recorded on the 12th Feb and is the warmest December day I've recorded to date. | ||||||||||||
13 | 8.8 | 19.4 | 13.3 | 5.4 | 30 | 128 | North East | 1.6 | 12.4 | 1007.3 | 1015.8 | +8.5 |
Early morning rain clearing later in the morning and cloud breaking. Light breezes in the morning, NE winds in the afternoon. | ||||||||||||
14 | 8.4 | 18.3 | 12.6 | 5.4 | 27 | 127 | North East | 0 | 0 | 1015.9 | 1020.3 | +4.4 |
Mostly cloudy but some sunny breaks in the afternoon. Light southerly breezes til mid afternoon then light NE winds. | ||||||||||||
15 | 11.3 | 18.0 | 14.1 | 12.2 | 44 | 288 | North East | 0 | 0 | 1011.1 | 1020.1 | -9.0 |
Cloud breaking late morning with a mostly sunny afternoon. Fresh NE winds. | ||||||||||||
16 | 7.9 | 23.7 | 16.3 | 5.5 | 32 | 131 | North East | 0 | 0 | 1000.9 | 1012.2 | -11.3 |
Cloud with haze in the morning with light NE winds. A few spots of rain mid afternoon then becoming warmer with northerly winds in the evening. A southerly change arriving about midnight. | ||||||||||||
17 | 7.9 | 17.5 | 13.0 | 12.2 | 51 | 286 | South | 0.2 | 0.2 | 1004.6 | 1019.9 | +15.3 |
Morning light showers with a gusty cool southerly wind. Wind easing in the afternoon and cloud breaking. Calm in the evening. | ||||||||||||
18 | 3.5 | 17.9 | 12.0 | 9.3 | 41 | 219 | North East | 0 | 0 | 1015.9 | 1020.0 | -4.1 |
Some cloud durung the morning clearing by afternoon. Sunny with NE winds, fresh in the afternoon. | ||||||||||||
19 | 12.3 | 20.9 | 16.4 | 10.2 | 36 | 241 | North East | 0 | 0 | 1003.0 | 1016.0 | -13.0 |
Clear and sunny after the clearance of morning cloud. Some high cloud in the evening. NE winds. | ||||||||||||
20 | 6.8 | 17.7 | 12.5 | 11.5 | 55 | 266 | South | 3.6 | 55.4 | 999.2 | 1009.1 | +9.9 |
Cloudy with southerly breezes and some light rain late morning. Heavy rain from mid afternoon with colder temperatures. Some surface flooding around Christchurch. | ||||||||||||
21 | 5.6 | 12.3 | 8.5 | 18.8 | 54 | 446 | South | 1.6 | 10.8 | 1009.0 | 1017.0 | +8.0 |
Strong cold southerly winds with squally showers, some with hail. Showers clearing in the afternoon. | ||||||||||||
22 | 6.8 | 12.7 | 9.0 | 20.7 | 56 | 490 | South | 2.0 | 13.4 | 1015.9 | 1018.8 | -2.9 |
Strong cold southerly winds with frequent heavy showrs in the morning. Showers clearing in the afternoon and cloud breaking. Southerly winds increasing from mid afternoon but easing in the evening. | ||||||||||||
23 | 6.9 | 12.4 | 9.3 | 11.5 | 48 | 273 | South | 0.6 | 10.4 | 1006.0 | 1015.9 | -9.9 |
Cold southerly winds and showers in the morning. Showers clearing by early afternoon and cloud breaking. Wind easing in the evening. | ||||||||||||
24 | 7.3 | 18.9 | 13.3 | 4.6 | 27 | 110 | North East | 0 | 0 | 1004.8 | 1009.0 | +4.2 |
Broken cloud with some morning sun. Cloud increasing from about midday and becoming overcast with a few spots of rain about 1:30pm. NE winds. | ||||||||||||
25 | 11.1 | 20.7 | 14.6 | 7.9 | 42 | 187 | North East | 0 | 0 | 1008.7 | 1012.9 | +4.2 |
Morning cloud clearing and sunny for a time. Cloud increasing late afternoon with a cool NE wind picking up. Drizzle and showers in the evening. | ||||||||||||
26 | 13.4 | 22.0 | 17.6 | 8.1 | 31 | 189 | North East | 0.2 | 0.4 | 1000.2 | 1009.2 | -9.0 |
Early morning showers, Overcast and mild by day with north east winds tending north to nor'west breezes during the day. | ||||||||||||
27 | 12.7 | 26.3 | 18.9 | 5.7 | 33 | 136 | North East | 0.2 | 0.2 | 992.3 | 1000.3 | -8.0 |
Cloudy with light rain in the morning. Cloud clearing and sunny in the afternoon with warm north to nor'west winds. | ||||||||||||
28 | 10.3 | 23.9 | 15.5 | 7.4 | 34 | 174 | North East | 0 | 0 | 994.3 | 1004.0 | +9.7 |
Morning cloud clearing to a mostly sunny day. Southerly breezes in the morning, NE winds in the afternoon. | ||||||||||||
29 | 8.8 | 24.0 | 14.5 | 6.5 | 32 | 153 | South | 0.2 | 0.6 | 1002.0 | 1006.1 | -4.1 |
Cloud clearing by midday to a sunny afternoon. Thundery buildups to the south east moved over the city about 4pm with some showers and thunder heard. Cloud increasing later in the evening. | ||||||||||||
30 | 8.1 | 12.4 | 9.9 | 15.7 | 57 | 370 | South | 2.8 | 13.4 | 1005.0 | 1015.2 | +10.2 |
Strong cold southerly winds with frequent morning showers. Showers clearing in the afternoon and winds easing by evening. | ||||||||||||
31 | 7.1 | 10.9 | 9.0 | 12.1 | 37 | 287 | South | 0.2 | 0.6 | 1014.9 | 1018.7 | +3.8 |
Cloudy with cold southerly winds. Showrs around midday. The coldest maximum temperature recorded for any December to date at my station. (Records going back to 2000) |