My January
Temperature:
With a mean temperature for the month of 15.8C, this January was below my average of 16.4C. Despite being a grey and damp month, it was warmer than 2000, 2002 and 2007.
No air frost and no daily maximums less than 10C were recorded. The warmest day was the 2nd with 33.3C, the only day to reach at or over 30C where my average for January is 2. My record maximum is 37.2C on the 8th January 2009. My coldest January temperature to date is 3.5C on 15th Jan 2003
There were 30 days where the temperature was at or over 15C, 18 days where the temperature was at or above 20C, my average is 20. There were 8 days at or over 25C, my average is 9, Jan 2006 and 2009 hold my record of 15 days at or over 25C.
Wind: (Records from 2001)
The monthly wind run of 6220km is 107% of my January average of 5840km making this January the second windiest I've recorded, the windiest being 2008 with 6326km. The least windy to date was 2009 with 5415km . The highest gust was 61km/h from the north north west on the 2nd.
Rainfall: (Incomplete records for January 2000 and 2002)
January had 63mm of rain over 11 days, a little more then twice my average of 30.7mm . The wettest day was the 22nd with 17.5mm.
My driest Jan was 2007 with 15.4mm.
Barometer: (Records from 2006)
The average pressure for the month was a little below my January average of 1011.4 hPa with 1010.4 hPa. Maximum pressure change of -21hPa on the 3rd is close to my January average of 20.
The NIWA climate summaries can be seen here.
| January 2010 Summary Temperature |
|
|---|---|
| Mean | 15.8 C |
| Mean Maximum | 21.7 C |
| Mean Minimum | 11.4 C |
| Maximum High | 33.3 C (2nd) |
| Maximum Low | 15.4 C (21st) |
| Minimum High | 12.9 C (16th) |
| Minimum Low | 6.1 C (11th) |
| Wind Speed and Direction | |
| Maximum Gust | 61 km/h (2nd) |
| Mean | 8.8 km/h |
| Wind Run | 6220 km |
| Max Daily Windrun | 337 km (12th) |
| Prevailing Direction | East Nth East |
| Barometer | |
| Maximum | 1030.0 hPa (31st) |
| Minimum | 989.6 hPa (10th) |
| Mean | 1010.4 hPa |
| Max Daily Change | -21.0 hPa (3rd) |
| Rainfall | |
| Days with Measured Rainfall (Greater than 0.2mm) |
11 |
| Max Daily Rainfall | 17.5 mm (22nd) |
| Monthly Rainfall | 63.0 mm |
| Humidity | |
| Maximum |
99 % (Several Days) |
| Minimum | 18 % (1st) |
| 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 | 12.0 | 28.6 |
20.6 | 7.3 |
54 | 167 | East Nth East | 0 | 0 | 1000.7 | 1012.0 |
-11.3 |
| Sunny morning with light NE winds. Cloud increasing in the afternoon with a change in the evening to nor'west winds, strong about midnight |
||||||||||||
| 2 | 11.4 | 33.3 | 19.3 | 11.5 | 61 | 261 | South Sth West | 0 | 0 | 996.8 | 1012.0 | +15.2 |
| Strong nor'west winds early in the morning. A southerly change about 11am took the temperature from 33.3C to around 21 in 2 hours. Sunny in the morning, becoming overcast from mid afternoon. (Temperature reached 30C by 10am, the only other day in my records to reach 30C by 10am was 8th Jan 2009 when the temperature reached 37.2C) |
||||||||||||
| 3 | 12.4 | 29.3 | 19.8 | 9.5 | 41 | 219 | East Nth East | 0 | 0 | 990.1 | 1011.1 | -21.0 |
| Fresh NE winds in the morning easing and turning warm nor'west in the afternoon. Mostly overcast but cloud breaking for a time in the morning. | ||||||||||||
| 4 | 11.4 | 26.8 | 16.9 | 9.4 | 57 | 214 | South Sth West | 0.5 | 0.5 | 991.6 | 1012.2 | +20.6 |
| Clear, mild and sunny in the morning with NE winds turning nor'west in the afternoon. A cool and gusty southerly change with a few showers arrived quickly around 3pm | ||||||||||||
| 5 | 10.5 | 18.7 | 15.2 | 7.2 | 34 | 164 | East Nth East | 0 | 0 | 1012.3 | 1016.3 | +4.0 |
| Any morning cloud clearing to a sunny day with NE winds, freshening later in the afternoon. Some high cloud late afternoon. | ||||||||||||
| 6 | 11.1 | 29.5 | 19.8 | 6.9 | 49 | 157 | North Nth West | 0 | 0 | 1006.3 | 1015.3 | -9.0 |
| Mostly sunny but high cloud increasing late afternoon. North to nor'west winds. | ||||||||||||
| 7 | 12.6 | 27.3 | 19.8 | 10.4 | 44 | 238 | North Nth East | 0 | 0 | 998.5 | 1008.0 | -9.5 |
| Variable winds during the day from north to nor'west, to the south for a time then back to nor'west with a few spots of afternoon rain then southerly from late afternoon. Mostly cloudy with some sunny breaks. | ||||||||||||
| 8 | 7.8 | 20.3 | 14.0 | 9.8 | 39 | 224 | South Sth West | 0 | 0 | 1001.7 | 1019.2 | +17.5 |
| Cloud increasing in the afternoon with a few spots of rain. Southerly winds. | ||||||||||||
| 9 | 7.9 | 17.4 | 13.6 | 6.5 | 38 | 150 | North Nth East | 0.5 | 0.5 | 1008.8 | 1019.6 | -10.8 |
| Early morning showers clearing before dawn. Sunny morning. Cloud increasing in the afternoon with a freshening north easterly | ||||||||||||
| 10 | 8.5 | 24.3 | 15.6 | 9.2 | 58 | 204 | East Nth East | 1.0 | 6.5 | 989.6 | 1008.4 | -18.8 |
| Cloud breaking during the morning. NE winds turning nor'west at times. A strong cold southerly change arriving after 4pm with rain. | ||||||||||||
| 11 | 6.1 | 18.3 | 12.4 | 5.4 | 34 | 124 | South Sth West | 1.5 | 5.5 | 999.6 | 1003.7 | +4.1 |
| Showers morning and evening, southerly winds | ||||||||||||
| 12 | 10.1 | 16.5 | 12.6 | 14.7 | 46 | 337 | South Sth West | 1.0 | 6.0 | 1004.3 | 1010.8 | +6.5 |
| Morning showers clearing and cloud breaking. Cool southerly wind easing in the evening. | ||||||||||||
| 13 | 9.9 | 19.2 | 13.9 | 5.8 | 27 | 133 | East Nth East | 0 | 0 | 1008.4 | 1012.2 | -3.8 |
| Overcast with a few spots of rain in the afternoon. NE winds in the afternoon. | ||||||||||||
| 14 | 11.3 | 20.8 | 13.8 | 11.1 | 44 | 253 | East Nth East | 0.5 | 3.5 | 1005.9 | 1020.1 | +14.2 |
| Sunny morning with mild temperatures. A southerly change late morning with increasing cloud and showers. | ||||||||||||
| 15 | 10.3 | 20.3 | 14.7 | 6.6 | 30 | 151 | South Sth West | 0 | 0 | 1018.8 | 1022.3 | +3.5 |
| Some cloud at times but mostly sunny with southerly winds. | ||||||||||||
| 16 | 9.9 | 12.9 | 11.1 | 13.2 | 38 | 302 | South Sth West | 1.0 | 6.0 | 1015.6 | 1022.9 | -7.3 |
| Overcast with cool southerly winds, drizzle and light rain from mid afternoon. | ||||||||||||
| 17 | 10.0 | 17.1 | 13.0 | 7.9 | 26 | 180 | South West | 0.5 | 4.5 | 1012.5 | 1017.1 | -4.6 |
| Overcast with morning drizzle and southerly winds. | ||||||||||||
| 18 | 12.9 | 21.4 | 15.5 | 4.2 | 23 | 96 | East Nth East | 0 | 0 | 1011.1 | 1013.2 | -2.1 |
| Overcast with low cloud morning and evening, light NE winds. | ||||||||||||
| 19 | 13.9 | 20.4 | 15.7 | 6.7 | 26 | 155 | East Nth East | 0 | 0 | 1010.7 | 1013.1 | -2.4 |
| Overcast with low cloud in the morning, some drizzle. Cloud breaking for a time in the afternoon, NE winds. | ||||||||||||
| 20 | 14.3 | 23.6 | 17.3 | 5.8 | 25 | 132 | East Nth East | 0 | 0 | 999.9 | 1010.8 | -10.9 |
| Overcast with low cloud in the morning. Cloud breaking in the afternoon but returning in the evening. | ||||||||||||
| 21 | 15.4 | 21.9 | 17.8 | 8.9 | 31 | 205 | East Nth East | 0.5 | 0.5 | 994.9 | 1000.0 | -5.1 |
| Overcast with some light showers, NE winds. | ||||||||||||
| 22 | 12.0 | 16.5 | 14.4 | 12.3 | 44 | 283 | South Sth West | 1.0 | 17.5 | 997.2 | 1008.5 | +11.3 |
| Morning drizzle, afternoon showers and evening rain with a cool southerly wind. | ||||||||||||
| 23 | 11.3 | 15.4 | 12.7 | 13.0 | 41 | 299 | South Sth West | 1.0 | 10.0 | 1006.1 | 1010.3 | -4.2 |
| Rain and showers clearing by early afternoon. Cloud breaking in the evening. Cool southerly winds. | ||||||||||||
| 24 | 10.7 | 19.8 | 13.6 | 5.7 | 47 | 131 | South Sth west | 0 | 0 | 1002.6 | 1014.3 | +11.7 |
| Mild morning with light north the NE winds and the odd spot of rain. A cool southerly change about 2pm with some drizzle | ||||||||||||
| 25 | 11.8 | 18.8 | 14.9 | 8.5 | 41 | 196 | East Nth East | 0 | 0 | 1013.3 | 1018.0 | +4.2 |
| Morning cloud breaking to a sunny day for a change. Fresh NE wind. | ||||||||||||
| 26 | 11.5 | 19.9 | 15.6 | 6.9 | 27 | 160 | East Nth East | 0 | 0 | 1018.1 | 1020.7 | +2.6 |
| Morning drizzle. Cloud breaking from late morning. NE wind. | ||||||||||||
| 27 | 14.6 | 20.4 | 17.2 | 10.5 | 37 | 241 | East Nth East | 0 | 0 | 1014.8 | 1020.0 | -5.2 |
| Cloud breaking late morning then mostly sunny, some high cloud in the afternoon. Humid with NE winds. | ||||||||||||
| 28 | 13.3 | 25.2 | 17.2 | 7.5 | 25 | 170 | South West | 0 | 0 | 1016.6 | 1020.5 | +3.9 |
| Overcast with southerly winds in the morning. Cloud breaking and winds turning NE around midday. | ||||||||||||
| 29 | 14.5 | 21.0 | 16.9 | 9.1 | 44 | 209 | East Nth East | 0 | 0 | 1016.3 | 1020.8 | -4.5 |
| Cloudy for much of the day but some sunny intervals. NE winds freshening in the afternoon. | ||||||||||||
| 30 | 13.6 | 28.2 | 19.0 | 12.6 | 50 | 289 | East Nth East | 0 | 0 | 1012.7 | 1026.0 | +13.3 |
| Mild north to NE winds. A strong southerly change late afternoon with increasing cloud but remaining dry. | ||||||||||||
| 31 | 9.8 | 19.7 | 15.2 | 7.2 | 28 | 163 | South West | 0 | 0 | 1026.1 | 1030.0 | +3.9 |
| Some morning cloud but a mostly sunny day. Southerly winds turning light north to NW in the evening. | ||||||||||||
