My July

Temperature:
The mean temperature for the month was 5.6C, which is my July average. The warmest July I've recorded was 2005 with an average temperature of 7.4C, the coldest, 2001 with 2.5C.
The warmest day was the 26th with 13.7C, the minimum was -4.3C on the 11th, the coldest July temperature since 2004. My coldest July temperature to date is -6.9C on 3rd July 2001

There were 12 days with a temperature at or below 0, my July average is 11. There were 13 days where the maximum temperature for the day was less than 10C, my average is 16. This is the first July I've recorded were the temperature never got to or exceeded 15C. My average is 3 days.

Wind: (Records from 2001)
The monthly wind run of 2635km is 76% of my July average of 3425km making this July the least windy July I've recorded. The windiest July was 2008 with 4724km. The highest gust was 48km/h from the south south west on the 9th.

Rainfall:
July had 54.5mm of rain over 11 days, 81% of my 67mm July average.  The wettest day was the 22nd with 15mm. My wettest July day was 12th July 2008 with 46.4mm. The wettest July was also 2008 with 195.4mm, the driest, 2000 with 18.8mm.

Barometer: (Records from 2006)
The average pressure for the month was well above my July average of 1012.3 hPa with 1018.6 hPa. Maximum pressure change of +13.5 hPa is below my July average of 22 hPa and the lowest recorded to date. Lowest pressure was 1002.8 hPa, well above my 987.2 hPa average minimum pressure.

NIWA monthly climate summaries can be seen here.

July 2010 Summary
Temperature
Mean 5.6 C
Mean Maximum 10.4 C
Mean Minimum 1.6 C
Maximum High 13.7 C (26th)
Maximum Low 7.1 C (22nd)
Minimum High 6.9 C (9th)
Minimum Low -4.3 C (11th)
Wind Speed and Direction
Maximum Gust 48 km/h (9th)
Mean 3.7 km/h
Wind Run 2635 km
Max Daily Windrun 259 km (9th)
Prevailing Direction East Nth East
Barometer
Maximum 1033.5 hPa (11th)
Minimum 1002.8 hPa (27th)
Mean 1018.6 hPa
Max Daily Change +13.5 hPa (20th)
Rainfall
Days with Measured Rainfall
(Greater than 0.2mm)
11
Max Daily Rainfall 15.0 mm (22nd)
Monthly Rainfall 54.5 mm
Humidity
Maximum
100 % (Several Days)
Minimum 50 % (28th)

July 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 -0.7 12.3 4.1 1.3 17 30 East Nth East 0.5 0.5 1009.9 1015.1 +5.2
Morning frost. Clear and sunny with light NE breezes. 0.5mm from condensation and drizzle the previous morning.
2 -1.2 10.8 4.3 2.3 23 53 East Nth East 0 0 1015.1 1019.2 +4.1
Morning frost, clear and sunny with light winds.
3 -2.1 12.1 3.6 0.3 7 6 South West 0 0 1011.7 1017.1 -5.4
Morning frost, clear and sunny with virtually no wind.
4 -1.7 12.5 3.7 0.8 18 18 South Sth West 0.5 0.5 1011.9 1018.8 +6.9
Morning frost. Clear and sunny with southerly light winds tending NE in the afternoon. 0.5mm from frost condenstaion over the last few days.
5 3.3 10.5 7.3 3.2 24 72 East Nth East 0 0 1014.8 1019.9 +5.1
Broken cloud, light NE winds.
6 2.9 8.6 5.2 1.2 12 25 South Sth West 0.5 0.5 1018.8 1023.6 -4.8
Morning mist. Mostly cloudy with light afternoon showers.
7 1.0 8.7 4.5 3.5 24 79 South Sth West 0 0 1013.2 1018.7 -5.5
Mostly cloudy, cool southerly breezes.
8 1.4 8.1 5.1 7.5 41 170 South Sth West 0.5 4.5 1011.5 1016.8 +5.3
Overcast with showers from afternoon and strengthening southerly winds.
9 3.7 6.9 5.2 11.4 48 259 South Sth West 0.5 6.5 1016.9 1029.9 +13.0
Overcast with showers and a cld southerly wind.
10 -1.9 8.7 3.3 1.0 11 23 South Sth West 0.5 0.5 1029.3 1031.9 +2.6
Morning cloud clearing to a sunny day with little wind. Frosty at night.
11 -4.3 8.2 0.7 0.5 10 10 South West 0 0 1030.8 1033.5 +2.7
Coldest temperature since July 8 2007. Heavy frost, clear and sunny with little wind, some cloud in the evening.
12 -0.8 8.8 4.4 6.4 33 146 East Nth East 0 0 1023.0 1032.0 -9.0
Some cloud but mostly sunny with a cool NE wind.
13 -1.9 11.4 4.5 0.3 9 6 East Nth East 0.5 0.5 1021.0 1024.8 +3.8
Sunny morning but cloud increasing after midday. Light varialbe breezes. 0.5mm from frost condensation.
14 -1.9 10.7 4.3 3.3 23 76 East Nth East 0 0 1020.8 1027.2 -6.4
Clear and sunny, light NE winds.
15 6.3 11.1 8.3 10.8 38 248 East Nth East 1.0 1.5 1011.1 1021.3 -10.2
Variable cloud, cool NE wind. Showers late evening.
16 3.7 8.7 6.1 5.0 23 114 South Sth West 1.0 6.5 1009.7 1012.1 -2.4
Showers early morning. Overcast with southerly winds, rain in the evening.
17 4.8 9.4 6.6 3.4 16 75 South Sth West 0.5 6.0 1010.0 1013.1 +3.1
Early morning showers. Overcast with light southerly winds.
18 3.6 10.0 6.6 3.1 24 71 East Nth East 0 0 1012.7 1017.3 +4.6
Mostly cloudy but a little brighter in the afternoon, light southerly breezes turning NE from midday.
19 3.1 11.5 6.8 3.7 21 84 East Nth East 0 0 1012.8 1017.1 -4.3
Fog clearing around midday. Some high cloud in the afternoon. Southerly winds in the morning turning NE from midday.
20 5.0 13.0 7.9 4.5 28 101 East Nth East 0.5 2.0 1009.9 1023.4 +13.5
Mostly cloudy with a southerly change from midday. Light rain from late afternoon.
21 6.2 10.2 7.8 4.3 24 96 East Nth East 0.5 4.0 1020.1 1026.9 -6.8
Morning and evening showers. Mostly cloudy though some breaks in the afternoon. Light NE winds.
22 7.1 9.6 8.4 8.2 33 187 South Sth West 1.0 15.0 1010.9 1019.8 -8.9
Showers and drizzle with misty low cloud. NE winds turning cooler southerly from mid morning.
23 6.5 9.6 8.3 3.0 20 69 South Sth West 0.5 5.5 1013.6 1021.4 +7.8
Overcast with cool southerly breeze. Showers and drizzle.
24 4.1 9.0 6.5 3.7 25 83 East Nth East 0 0 1015.2 1021.0 -5.8
Broken cloud with some sunny intervals, cool NE wind.
25 4.8 11.2 7.5 1.6 15 37 East Nth East 0 0 1015.2 1020.3 +5.1
A few sponts of rain in the morning. Brighter in the afternoon with cloud breaking for a time. Light southerly breezes tending NE late afternoon.
26 2.5 13.7 7.7 3.3 17 75 East Nth East 0 0 1007.1 1017.5 -10.4
Morning cloud clearing to a sunny day with light north to NE breezes.
27 0.1 9.9 5.4 5.4 41 123 South Sth West 0 0 1002.8 1015.9 +13.1
Southerly change in the morning but remaining dry. Cloud breaking in the afternoon, frosty in the evening.
28 -2.5 12.3 3.3 0.5 10 12 South West 0 0 1015.5 1021.5 +6.0
Morning frost, sunny with light breezes.
29 -1.4 11.3 3.3 1.6 14 35 South Sth West 0 0 1021.3 1029.1 +7.8
Broken cloud with southerly breezes, cloud clearing late afternoon, frosty in the evening.
30 -2.5 10.0 4.0 4.6 24 105 East Nth East 0 0 1027.6 1031.2 -3.6
Morning frost. sunny with cool NE breeze.
31 1.8 12.9 8.6 5.7 21 131 East Nth East 0 0 1017.0 1027.5 -10.5
Overcast with a nor'west arch of cloud. NE winds.

July 2010 Temperature Graph
July 2010 Wind Dir Graph
July 2010 Wind Dir % Graph
July 2010 Wind Speed Graph
July 2010 Rainfall Graph
July 2010 Barograph
July 2010 Humidity Graph