July Summary

Below average temperature, above average wind run and 85% of expected rainfall but the year is still 175mm below average.

(July compared to my records from the past 10 years.)

  • This July was just below my average temperature of 6.6C with 6.3C.
    • The warmest temperature was 16.8C, my July record is 21.6C recorded in 2014.
    • The coldest temperature was -3.7C, the lowest since 2017.
    • Twelve days recorded an air frost (0c or below), my average is 8 days.
    • This is the highest number of air frosts since 2011 which also had 12.
    • Thirteen days failed to reach 10C, my average is 10.
    • Only three days reached or exceeded 15C, my average is 7.
    • Have to go back to 2008 to equal that total.
  • Wind run was 117% of my average of 3213km with 3763km.
  • The barometer recorded above average pressure for the month with 1015.8hPa. My average is 1012.8hPa.
  • Rainfall was 85% of the average expected total of 61mm with 51.6m.
    • 2016 is the driest July in the past 10 years with 25.5mm
    • 2017 is the wettest July in the past 10 years with 167mm.
July 2020 Summary
Temperature
Mean 6.3 C
Mean Maximum 10.9 C
Mean Minimum 2.2 C
Maximum High 16.8 C (21st)
Maximum Low 8.9 C (20th)
Minimum High 6.0 C (1st)
Minimum Low -3.7 C (25th)
Wind Speed and Direction
Maximum Gust 56 km/h (1st)
Mean 5.3 km/h
Wind Run 3763 km
Max Daily Windrun 409 km (1st)
Prevailing Direction East North East
Barometer
Maximum 1040.4 hPa (29th)
Minimum 985.1 hPa (21st)
Mean 1015.8 hPa
Max Daily Change -18.7 hPa (20th)
Rainfall
Days with Measured Rainfall
(0.2mm or more)
15
Max Daily Rainfall 17.8 mm (9th)
Monthly Rainfall 51.6 mm
Humidity
Maximum 99 % (Several Days)
Minimum 42 % (24th)

 

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 3.5 6.0 5.0 17.8 56 408 South West 0.6 10.4 1006.6 1011.2 +4.6
Showers with sleet and cold a southerly wind. Maximum temperature recorded at 9:20pm.
Think it's been gloomy recently? The NZ record was set back in 2002
2 0.9 8.5 5.6 10.0 41 228 South Sth West 0.2 0.6 1011.2 1023.2 +12.0
Showers less frequent in the afternoon, with southerly winds dying out.
Christchurch experiences gloomiest month in more than two decades
3 -2.6 9.1 2.8 0.7 11 16 East Nth East 0.2 0.2 1020.3 1023.1 -2.8
Morning frost then sunny, high cloud increasing in the afternoon. Light breezes tending NE.
Despite gloom, June continues 41-month-long warm spell
4 4.5 10.7 8.0 8.0 33 181 East Nth East 0 0 1009.0 1021.1 -12.1
Overcast with some light rain in the morning. Cloud lifting in the afternoon, NE winds.
5 8.7 14.6 11.1 6.3 24 144 East Nth East 0 0 997.9 1008.9 -11.0
Overcast with high cloud and mostly light NE winds. A few spots of rain at night.
6 1.5 10.8 8.6 4.9 28 112 East Nth East 0 0 989.6 997.4 -7.8
Overcast with variable winds tending NE. Cloud breaking in the evening.
7 0.6 10.7 5.2 1.8 25 41 South Sth West 0.4 2.2 988.9 994.2 +5.3
Cloudy with morning rain clearing for a time but returning from late afternoon. Light winds tending southerly.
8 1.7 8.8 5.4 11.1 44 253 South West 0.8 5.2 994.2 1008.7 +14.5
Morning and evening showers, some sunny intervals in between. Cold southerly winds.
9 2.3 8.9 5.6 9.3 37 213 South West 1.2 17.2 1008.5 1020.7 +12.2
Morning rain and cold southerly winds. Rain clearing in the afternoon but remaining cloudy.
More hot days, fewer frosts: how NZ's climate has already changed
10 -1.4 11.1 4.3 1.3 16 29 East Nth East 0 0 1020.6 1023.3 +2.7
Morning frost. Clear and sunny wilt light NE breezes.
11 -1.6 11.8 3.9 1.6 16 37 East Nth East 0 0 1011.0 1020.8 -9.8
Morning frost and cloud. Cloud clearing late morning to a sunny day with light NE breezes.
12 4.0 16.6 9.3 5.7 35 129 East Nth East 0.2 1.4 1005.6 1016.6 +11.0
Mostly cloudy but a few sunny intervals. North to NE winds. A period of rain in the evening.
13 -0.5 9.6 4.4 1.9 29 43 South West 0.2 0.2 1016.9 1027.6 +10.7
Sunny with a few clouds, light southerly winds.
14 -3.1 10.0 1.8 0.7 12 15 East Nth East 0 0 1023.1 1028.3 -5.2
Morning frost, sunny with some high cloud increasing later in the day.
15 -1.1 8.6 4.2 2.3 17 51 South Sth West 0.2 1.0 1025.9 1028.4 -2.5
Overcast with some light showers and light southerly winds.
16 -0.6 7.7 3.8 0.7 20 16 East Nth East 0.2 0.4 1022.8 1027.8 -5.0
Early showers. Morning fog, cloudy with light winds.
17 1.1 9.1 5.5 4.7 29 106 East Nth East 0 0 1021.6 1024.6 -3.0
Morning drizzle. Cloud breaking with a few brighter intervals. Light showers in the evening.
18 5.6 9.2 7.5 1.9 21 42 East Nth East 0.6 7.0 1021.6 1025.4 +3.8
Overcast with misty drizzle. A period of rain in the afternoon. Light breezes.
19 8.5 11.7 9.8 8.6 32 196 East Nth East 0.4 3.0 1017.7 1025.1 -7.4
Overcast with morning showers. Cloud breaking with sunny intervals in the afternoon. NE winds.
20 8.9 13.5 10.6 9.7 31 221 East Nth East 0 0 998.7 1017.4 -18.7
Cloud breaking with some sunny intervals. NE wind.
More big NZ deluges likely with emerging La Nina - Niwa
21 5.0 16.8 10.9 6.2 33 141 East Nth East 0 0 985.1 998.1 -13.0
Some cloud with sunny intervals. Mild in the afternoon. North to NE wind.
22 4.0 9.7 7.2 8.4 37 192 South Sth West 0.2 0.4 986.9 996.9 +10.0
Early showers clearing. Cloud breaking to a sunny afternoon with cold southerly winds turning northerly.
New model gives NZ months' more warning of tropical cyclones
23 -0.3 9.6 4,2 2.2 35 51 South Sth West 0.6 1.6 989.7 1005.8 +16.1
Morning cloud. Showers on the afternoon, some with hail, mostly light winds tending southerly.
24 -3.6 10.0 2.6 1.6 16 36 East 0.2 0.2 1006.1 1021.1 +14.9
Morning frost. Sunny with light breezes. Some late high cloud.
25 -3.7 12.3 2.8 0.9 12 19 East Nth East 0 0 1021.2 1025.1 +3.9
Morning frost then sunny with some thin high cloud. Light breezes tending NE
26 -2.6 13.5 4.6 1.9 19 43 East Nth East 0 0 1025.1 1030.8 +5.7
Morning frost. Sunny with light breezes tending NE.
27 -1.2 11.3 5.4 5.0 27 115 East Nth East 0 0 1030.9 1034.6 +3.7
Morning frost. partly cloudy with a cool NE wind in the afternoon.
28 2.4 8.8 5.7 5.6 24 129 South West 0 0 1031.3 1039.7 +8.4
Mist and low cloud for much of the day with a cold SW wind.
29 4.9 10.5 7.8 7.2 32 160 East Nth East 0 0 1032.5 1040.4 -7.9
Overcast with cool NE wind.
30 8.8 14.6 11.0 8.3 31 189 East Nth East 0 0 1021.9 1032.1 -10.2
Few sunny intervals in the morning, high cloud increasing with a NE wind.
‘The week that snowed’ – shedding new light on old weather records
31 8.2 15.0 10.9 8.4 34 191 East Nth East 0 0 1019.8 1022.1 -2.3
Overcast with high cloud, NE wind.


july 2020  Temperature Graph
july 2020 Wind Dir Graph
july 2020 Wind Dir Graph
july 2020 Wind Speed Graph
july 2020 Rainfall Graph
july 2020 Barograph
july 2020 Humidity Graph