Temperature:
The mean temperature for the month was 16.9C, just above my January average of 16.4C. The warmest January was 2009. 18.6C, the coldest, 2000 with 15.0C.
The warmest day was the 16th with 33.8C, my January station record is 37.2C in 2009. The minimum was 7.0C on the 14th. My coldest January temperature to date is 3.5C in 2003.
No January days have ever been recorded with a temperature at or below 0 in the past 11 years. There were no days where the maximum temperature for the day was less than 10C. There were 20 days that reached or exceeded 20C equaling my January average. There were 9 days that reached or exceeded 25C, also equaling my January average. Four days reached or exceeded 30C, my average is 2.
Wind: (Records from 2001)
The monthly wind run of 5504km is 93% of my January average of 5882km. The windiest January was 2008 with 6326km, the least windy 2009 with 5415km. The highest gust was 57km/h from the south south west on the 29th.
Rainfall:
January had 52.0mm of rain over 9 days, 151% of my 34mm January average. The wettest day was the 18th with 23mm. My wettest January day was 18th January 2009 with 34mm in about 30 minutes during a thunder storm. The wettest January was 2010 with 63mm, the driest, 2007 with 15.4mm.
Barometer: (Records from 2006)
The average pressure for the month was close to my January average of 1011.2 hPa with 1011.9 hPa. Maximum pressure change of 30.8 hPa is well above my January average of 20.2hPa.
NIWA monthly climate summaries can be seen here.
| January 2011 Summary Temperature |
|
|---|---|
| Mean | 16.9 C |
| Mean Maximum | 23.0 C |
| Mean Minimum | 12.2 C |
| Maximum High | 33.8 C (16th) |
| Maximum Low | 15.9 C (3rd) |
| Minimum High | 16.3 C (20th) |
| Minimum Low | 7.0 C (14th) |
| Wind Speed and Direction | |
| Maximum Gust | 57 km/h (29th) |
| Mean | 7.7 km/h |
| Wind Run | 5504 km |
| Max Daily Windrun | 282 km (29th) |
| Prevailing Direction | East Nth East |
| Barometer | |
| Maximum | 1030.2 hPa (21st) |
| Minimum | 979.8 hPa (19th) |
| Mean | 1011.9 hPa |
| Max Daily Change | +30.8 hPa (19th) |
| Rainfall | |
| Days with Measured Rainfall (Greater than 0.2mm) |
9 |
| Max Daily Rainfall | 23.0 mm (18th) |
| Monthly Rainfall | 52.0 mm |
| Humidity | |
| Maximum |
97 % (22nd) |
| Minimum | 21 % (15th) |
| January 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 | 11.7 | 19.7 | 15.2 | 8.9 | 43 | 205 | East Nth East | 0.5 | 1.0 | 1012.4 | 1019.1 | -6.7 |
| Early showers clearing early morning and cloud breaking. Fresh NE winds in the afternoon |
||||||||||||
| 2 | 15.1 | 32.7 | 22.6 | 7.0 | 38 | 158 | North Nth West | 0 | 0 | 1007.6 | 1012.1 | -4.5 |
| High cloud breaking for a time after midday. Light NE winds turning warm NW. | ||||||||||||
| 3 | 15.9 | 33.1 | 24.1 | 6.1 | 31 | 139 | South Sth West | 0 | 0 | 1007.0 | 1012.8 | +5.8 |
| Very warm with light variable winds. A cooler southerly change arriving about 8pm. | ||||||||||||
| 4 | 15.2 | 22.9 | 16.7 | 9.6 | 34 | 218 | East Nth East | 0 | 0 | 1013.0 | 1019.1 | +6.1 |
| Cloudy with southerly winds turning NE in the afternoon. A few spots of rain in the evening. | ||||||||||||
| 5 | 14.1 | 18.1 | 15.9 | 5.8 | 24 | 134 | East Nth East | 0.5 | 2.0 | 1011.4 | 1018.5 | -7.1 |
| Overcast with light showers and NE winds. | ||||||||||||
| 6 | 15.6 | 27.4 | 18.6 | 8.7 | 39 | 199 | East Nth East | 0 | 0 | 994.0 | 1011.6 | -17.6 |
| Cloud breaking after midday, NE winds turning southerly late afternoon. | ||||||||||||
| 7 | 14.1 | 27.3 | 18.6 | 6.9 | 37 | 157 | East Nth East | 0 | 0 | 1000.9 | 1017.3 | +16.4 |
| Sunny with cloud increasing in the evening | ||||||||||||
| 8 | 9.7 | 18.7 | 14.7 | 8.9 | 38 | 204 | South Sth West | 0.5 | 3.0 | 1017.5 | 1030.0 | +12.5 |
| Early morning showers clearing before dawn. Cloud breaking to a sunny day with cool southerly winds. | ||||||||||||
| 9 | 7.9 | 21.9 | 14.8 | 6.4 | 36 | 149 | East Nth East | 0 | 0 | 1024.4 | 1030.0 | -5.6 |
| Clear and sunny, NE winds freshening in the afternoon. | ||||||||||||
| 10 | 12.6 | 23.7 | 16.7 | 9.6 | 30 | 220 | East Nth East | 0 | 0 | 1022.9 | 1025.8 | +2.9 |
| Variable cloud, NE winds turning southerly around midday. | ||||||||||||
| 11 | 13.0 | 18.2 | 15.0 | 6.8 | 29 | 155 | East Nth East | 0 | 0 | 1016.7 | 1025.4 | -8.7 |
| Cloud breaking at times in the afternoon, some light rain at times. | ||||||||||||
| 12 | 9.7 | 18.2 | 13.8 | 6.0 | 38 | 137 | South Sth West | 0 | 0 | 1014.2 | 1020.6 | +6.4 |
| Overcast with southerly winds, light drizzle from late afternoon. | ||||||||||||
| 13 | 9.3 | 20.2 | 13.7 | 4.7 | 28 | 108 | South Sth West | 0.5 | 1.0 | 1015.9 | 1020.8 | -4.9 |
| Early showers clearing to a sunny afternoon. Light southerly winds. | ||||||||||||
| 14 | 7.0 | 23.3 | 14.5 | 5.9 | 29 | 136 | East nth East | 0 | 0 | 1017.7 | 1022.1 | -4.4 |
| Light southerly winds turning NE from midday. Sunny with some cloud at times. | ||||||||||||
| 15 | 13.6 | 32.2 | 21.0 | 9.5 | 41 | 218 | East Nth East | 0 | 0 | 1001.1 | 1017.8 | -16.7 |
| NE winds turning warm Nor'west on the afternoon, variable high cloud. | ||||||||||||
| 16 | 14.7 | 33.8 | 23.0 | 11.3 | 52 | 258 | South Sth West | 0 | 0 | 993.3 | 1009.0 | +15.7 |
| Clear and sunny for most of the day with very warm nor'west winds. A cooler strong southerly change from mid afternoon with increasing cloud. | ||||||||||||
| 17 | 13.8 | 19.3 | 16.1 | 10.3 | 38 | 237 | East Nth East | 0.5 | 1.0 | 1001.8 | 1009.9 | -8.1 |
| Morning showers and drizzle. Overcast with humid NE winds. | ||||||||||||
| 18 | 14.0 | 23.4 | 17.4 | 5.4 | 29 | 123 | East Nth East | 1.5 | 23.0 | 981.0 | 1001.6 | -20.6 |
| Overcast and humid with rain from early afternoon easing in the evening. Mostly light NE winds. | ||||||||||||
| 19 | 12.9 | 29.6 | 20.6 | 10.2 | 49 | 231 | South Sth West | 0 | 0 | 979.8 | 1010.6 | +30.8 |
| Clear and sunny for most of the day with very warm northerly winds. A southerly change in the evening with increasing cloud. | ||||||||||||
| 20 | 10.9 | 16.3 | 12.9 | 7.9 | 40 | 180 | South Sth West | 0 | 0 | 1011.0 | 1029.0 | +18.0 |
| Overcast with some morning drizzle, southerly winds turning NE in the afternoon. | ||||||||||||
| 21 | 11.5 | 16.4 | 13.3 | 8.0 | 31 | 184 | East Nth East | 0 |
0 |
1025.1 | 1030.2 | -5.1 |
| Overcast with drizzle at times, cool NE winds in the afternoon. | ||||||||||||
| 22 | 10.9 | 18.8 | 14.0 | 5.9 | 33 | 135 | East Nth East | 2.5 | 19.5 | 1020.4 | 1025.6 | -5.2 |
| Morning showers, some heavy, NE winds from afternoon | ||||||||||||
| 23 | 11.4 | 18.2 | 14.4 | 5.5 | 27 | 126 | East Nth East | 0.5 | 0.5 | 1008.6 | 1020.3 | -11.7 |
| Early shower then mostly cloudy, NE winds. | ||||||||||||
| 24 | 9.4 | 24.0 | 15.7 | 4.8 | 27 | 109 | South Sth West | 0 | 0 | 1004.9 | 1008.6 | +3.7 |
| Morning cloud breaking, southerly winds turning NE from late afternoon. | ||||||||||||
| 25 | 14.3 | 20.5 | 16.9 | 9.6 | 38 | 221 | East Nth East | 0 | 0 | 1008.2 | 1012.8 | +4.6 |
| Broken cloud, NE winds freshening in the afternoon and easing in the evening. | ||||||||||||
| 26 | 10.4 | 27.3 | 19.1 | 4.1 | 32 | 93 | East Nth East | 0 | 0 | 1004.4 | 1014.7 | -10.3 |
| Mostly cloudy with southerly winds turning northerly from mid morning | ||||||||||||
| 27 | 14.8 | 22.4 | 18.8 | 9.7 | 42 | 222 | South Sth West | 0 | 0 | 1004.3 | 1018.5 | +14.2 |
| Fresh southerly winds turning northerly from evening, cloud increasing later in the afternoon. | ||||||||||||
| 28 | 13.6 | 20.1 | 16.7 | 9.5 | 44 | 219 | East Nth East | 0 | 0 | 995.9 | 1017.2 | -21.3 |
| Cloud increasing and becomming overcast in the afternoon, fresh NE winds easing late afternoon. | ||||||||||||
| 29 | 9.4 | 20.2 | 16.5 | 12.3 | 57 | 281 | South Sth West | 0.5 | 1.0 | 992.6 | 1013.2 | +20.6 |
| Morning showers clearing by early afternoon along with the cloud. Strong southerly winds easing by evening. | ||||||||||||
| 30 | 8.9 | 25.3 | 17.1 | 7.5 | 38 | 171 | East Nth East | 0 | 0 | 997.0 | 1014.2 | -17.2 |
| becoming overcast with high cloud from late morning. Warm northerly winds from afternoon. | ||||||||||||
| 31 | 12.8 | 19.2 | 16.0 | 7.1 | 46 | 163 | East Nth East | 0 | 0 | 990.2 | 1011.3 | +21.1 |
| Overcast in the morning with an early southerly and a few spots of rain. Winds easing and turning NE in the afternoon with cloud breaking for a time. Overcast in the evening with a few spots of rain. | ||||||||||||
