A typical July from my records;

  • An average temperature of 5.9C.
    • Maximum temperature expected about 18C.
    • Minimum temperature expected about -4C.
    • Eleven air frosts (air temp below 0C) will be recorded.
    • Fourteen days fail to reach 10C.
    • Three days are expected to reach or exceed 15C.
    • No days are expected to reach or exceed 20C.
  • Wind run would be around 3300km with the windiest day expected to have a wind run of 320km.
    • Maximum wind gust would be in the region of 50km/h.
  • There would be rain on 12 days with the monthly total of around 60mm.
July Daily Observations
TemperatureWindRainfallBarometer
DateMinMaxMeanMean
(Km/h)
Gust
(Km/h)
Run (km)Prevailing Dir10 Minute Max (mm)Total (mm)Min (hPa)Max (hPa)Change (hPa)
1 7.5 11.0 9.3 7.1 20 118 South West 0.5 1.0 1005.8 1011.1 -5.3  
Showers clearing by dawn and cloud breaking for a while late morning but overcast again after midday. Light southerly winds
2 6.8 11.7 8.3 2.7 19 61 South Sth West 0 0 1003.5 1007.2 -3.7  
Overcast with light winds tending southerly.
3 3.5 12.6 7.0 3.1 22 71 South Sth West 0 0 1003.9 1009.9 -5.2  
Morning cloud breaking to a mostly sunny afternoon with light breezes tending southerly from midday.
4 4.4 10.0 6.7 6.8 47 155 West Nth West 0.5 1.0 1000.0 1012.5 +12.5  
Cold southerly change in the morning clearing by midday to a sunny afternoon with light westerly breezes. 
5 -0.6 9.8 4.6 4.1 24 94 South Sth West 0 0 1012.0 1017.7 +5.7  
Morning frost, cloud increasing in the afternoon, cool southerly winds.
6 -0.2 9.6 4.4 0.8 15 19 Light Air 0 0 1013.3 1017.6 -4.3  
Mostly cloudy with occasional sunny intervals. Light variable breezes.
7 0.3 9.1 4.6 2.5 17 56 East Nth East 0 0 1009.0 1013.2 -4.2  
Cloudy with cool NE breeze from late morning. Drizzle in the afternoon.
8 0.7 10.7 6.1 3.2 24 72 East Nth East 0 0 1004.1 1009.5 -5.4  
Variable cloud, cool NE winds. 
9 4.6 10.5 6.6 4.8 21 111 South Sth West 0 0 1003.5 1009.6 +6.1  
Morning cloud breaking a little in the afternoon, cold southerly wind.
10 0.3 11.0 6.3 1.3 16 29 East Nth East 0.5 0.5 1009.4 1012.7 +3.3  
Morning mist and fog clearing to a mostly sunny day with a few clouds. Light NE winds. 0.5mm of rain recorded from dew condensation.
11 -1.1 10.6 3.7 7.1 43 163 East Nth East 1.0 18.5 1006.0 1014.5 +8.5  
Morning frost then sunny. Cloud increasing in the afternoon with cold southerlies and rain with hail and sleet in the evening.
12 0.2 4.9 2.0 8.5 36 193 West 0.5 16.5 1014.1 1023.1 +9.0  
Rain, hail, snow showers and very cold wind.
13 0.5 7.8 4.0 5.9 29 133 South West 0.5 9.0 1021.8 1024.6 -2.8
Cold with showers, some with hail, southerly winds
14 4.5 8.6 5.8 5.3 26 121 South West 0.5 1.0 1022.4 1024.3 -1.9
Overcast with a few sunny intervals. Occasional drizzle. Cold southerly wind.
15 1.3 8.3 4.9 2.8 17 64 East Nth East 0 0 1021.8 1024.4 -2.6  
Morning fog lifting and clearing by 11am. Sunny though cool with light NE winds. Low cloud and fog returning in the evening.
16 0.5 9.8 6.9 7.2 32 165 East Nth East 0 0 1015.7 1021.5 -5.8  
Overcast and cool with a NE wind. A few spots of rain in the afternoon.
17 4.8 10.0 7.9 6.9 28 159 South West 1.0 7.5 1014.9 1021.3 +6.4  
Overcast with light rain and drizzle in the morning clearing by midday. A period of heavier rain in the evening. Southerly winds.
18 3.8 10.2 7.2 4.4 29 101 East Nth East 0.5 0.5 1015.3 1022.4 -7.1  
Showers clearing before dawn, cloud breaking to a mostly sunny afternoon with NE winds.
19 3.4 13.4 8.1 5.4 32 122 East Nth East 0 0 1000.7 1014.9 -14.2  
Feeling mild about midday, NE winds with variable high cloud.
20 4.7 15.1 10.1 5.8 32 132 East Nth East 0 0 983.8 1000.5 -16.7  
Overcast and mild for the time of year. NE winds.
21 6.1 12.3 8.9 12.6 41 288 South West 1.0 29.5 964.6 983.5 -18.9  
Morning rain easing to showers in the afternoon, southerly winds. 964.6hPa is the lowest barometric pressure I've recorded in 11 years of barometer records. Previous record was June 2007 with 971.5hPa
22 5.3 9.1 6.7 18.5 54 423 West 1.5 55.5 978 1002.4 +24.4  
Rain and fresh to strong south to south west winds easing in the evening. Flooding in Christchurch and several areas down the East coast of the South Island. Maximum temperature recorded at 3am. It was the windiest day since April 6th this year and the wettest day since the 15th March 2014.
23 3.7 9.1 5.6 4.2 29 95 East Nth East 0.5 0.5 1000.2 1004.8 -4.6  
Morning cloud clearing to a sunny day with cool NE winds.
24                          
 
25                          
 
26                        
 
27                          
 
28                          
 
29                          
 
30                          
 
31