Summary of the May rainfall and temperature readings, as recorded at my weather station in Havelock North.
Total rainfall: 108.3mm (on 19 days)
Average April rainfall: 65mm
Maximum 24hr total: 28.8mm (on the 22nd)
Total from 1 January: 364.4mm (on 60 days)
Average from 1 January: 305mm
Maximum temperature: 26.1ºC (on the 2nd)
Minimum temperature: 3.2ºC (on the 31st)
May Weather Summary
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For today's weather discussion head to: New Zealand Weather & Climate
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- Location: Havelock North, New Zealand
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While I have not done my May summary, I have not recorded an air frost this year at my station.
The closest it has got is April 29th when there was a ground frost but an air temperature of +0.8 degrees.
Looking through my records for lowest temperatures in April and May from 2000 to 2004:
April 2000: 0
May 2000: -2.9
April 2001: -0.8
May 2001: -2.9
April 2002: +0.8
May 2002: -5.7
April 2003: -0.1
May 2003: -1.0
April 2004: +0.8
May 2004: +2.3
All the anticyclonic gloom and nor'easters last month has kept the temperature up, at least at my location. I don't have the Christchurch Airport records available at the moment but I'll have a look tonight to see how many air frosts have been recorded this year.
And now I've got the figures for the airport;
April 5: -1.5
April 11: -1.7
May 26: -0.4
May 27: -0.1
The closest it has got is April 29th when there was a ground frost but an air temperature of +0.8 degrees.
Looking through my records for lowest temperatures in April and May from 2000 to 2004:
April 2000: 0
May 2000: -2.9
April 2001: -0.8
May 2001: -2.9
April 2002: +0.8
May 2002: -5.7
April 2003: -0.1
May 2003: -1.0
April 2004: +0.8
May 2004: +2.3
All the anticyclonic gloom and nor'easters last month has kept the temperature up, at least at my location. I don't have the Christchurch Airport records available at the moment but I'll have a look tonight to see how many air frosts have been recorded this year.
And now I've got the figures for the airport;
April 5: -1.5
April 11: -1.7
May 26: -0.4
May 27: -0.1
Last edited by jeffsweather on Tue 01/06/2004 17:44, edited 1 time in total.
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May 2004 Waimauku, Auckland
Maximum Temperature: 22.9°C (Sunday 02 May)
Lowest Maximum: 12.4°C (Tuesday 25 May)
Minimum Temperature: 5.1°C (Friday 21 May)
Highest Minimum: 17.4°C (Sunday 02 May)
Total Rainfall: 267.5 mm
Days with rain: 18 out of 31 days
Most rain: 40.0 mm (Sunday 02 May)
Longest period without rain: 6 days (Ending Saturday 22 May)
Highest pressure: 1025 mb (Saturday 08 May)
Lowest pressure: 992 mb (Friday 14 May)
Rainfall year to date: 590.6 mm
'Wet' is a one word synopsis of May.
Maximum Temperature: 22.9°C (Sunday 02 May)
Lowest Maximum: 12.4°C (Tuesday 25 May)
Minimum Temperature: 5.1°C (Friday 21 May)
Highest Minimum: 17.4°C (Sunday 02 May)
Total Rainfall: 267.5 mm
Days with rain: 18 out of 31 days
Most rain: 40.0 mm (Sunday 02 May)
Longest period without rain: 6 days (Ending Saturday 22 May)
Highest pressure: 1025 mb (Saturday 08 May)
Lowest pressure: 992 mb (Friday 14 May)
Rainfall year to date: 590.6 mm
'Wet' is a one word synopsis of May.
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May 2004 Alexandra, Otago
Maximum Temperature: 21.6°C (02 May)
Lowest Maximum: 5.9°C (18 May)
Minimum Temperature: -4.6°C (27 May)
Highest Minimum: 10.8°C (03 May)
Total Rainfall: 36.75 mm
Days with rain: 8 out of 31 days
Most rain: 11 mm (11 May)
Rainfall year to date: 159.75mm
Highest pressure: 1029 mb (10 May)
Lowest pressure: 981 mb (29 May)
A month of fog, low cloud and a few narley forsts. Winter was a tease a way!
Maximum Temperature: 21.6°C (02 May)
Lowest Maximum: 5.9°C (18 May)
Minimum Temperature: -4.6°C (27 May)
Highest Minimum: 10.8°C (03 May)
Total Rainfall: 36.75 mm
Days with rain: 8 out of 31 days
Most rain: 11 mm (11 May)
Rainfall year to date: 159.75mm
Highest pressure: 1029 mb (10 May)
Lowest pressure: 981 mb (29 May)
A month of fog, low cloud and a few narley forsts. Winter was a tease a way!

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Remember that the first third of the month in Chch was sunny with west or northwest flows.Sunshine was down with only 127 hours, just 10 hours short of the average. I thought it may have been more than that with those grey overcast dull days???
I've seen NIWA's review of the month, and they said that snow settled in Methven on the 24th. I think they might've misheard what was said on TV1 Weather - which actually mentioned snow on Mt Hutt being reported from Methven. I don't that day's cold southerly was cold enough for snow on the plains - Deano's post mentioned it was about 6C in Ashburton at the time.
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My Stats for May
Temperature
Mean 10.5°C
Mean Maximum 14.1 °C
Mean Minimum 7.0 °C
Maximum High 23.0 °C - 2nd
Maximum Low 11.1 °C - 12th
Minimum High 9.6 °C - 24th
Minimum Low 2.3 °C - 27th
Wind Speed and Direction
Maximum Gust 60 km/h - 31st
Average 5.7 km/h
Wind Run 4482 km
Max Daily Windrun 259 km - 28th
Prevailing Direction North East
Rainfall
Days with Measured Rainfall 19
Max Daily Rainfall 22.4 mm - 24th
Monthly Rainfall 79.2 mm
John got 58.4mm and I got 79.2mm. To compare with your totals John, the days with any significant rainfall were:
12 May 2004 10.6
13 May 2004 14.6
24 May 2004 22.4
Any comments?
Temperature
Mean 10.5°C
Mean Maximum 14.1 °C
Mean Minimum 7.0 °C
Maximum High 23.0 °C - 2nd
Maximum Low 11.1 °C - 12th
Minimum High 9.6 °C - 24th
Minimum Low 2.3 °C - 27th
Wind Speed and Direction
Maximum Gust 60 km/h - 31st
Average 5.7 km/h
Wind Run 4482 km
Max Daily Windrun 259 km - 28th
Prevailing Direction North East
Rainfall
Days with Measured Rainfall 19
Max Daily Rainfall 22.4 mm - 24th
Monthly Rainfall 79.2 mm
John got 58.4mm and I got 79.2mm. To compare with your totals John, the days with any significant rainfall were:
12 May 2004 10.6
13 May 2004 14.6
24 May 2004 22.4
Any comments?
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Hi Jeff,jeffsweather wrote:
John got 58.4mm and I got 79.2mm. To compare with your totals John, the days with any significant rainfall were:
12 May 2004 10.6
13 May 2004 14.6
24 May 2004 22.4
Any comments?
Interesting our differences.
I record 7:30am to 7:30am (manualy)for my readings whereas you use the 0001 to 2359hr period.
Anyway on those dates above:
12 May was 17mm here
13 May was 5.3mm here
24 May was 11.3mm here
I haven't checked your site to compare but it would be interesting to see how Bob Crowder's records compare. He is overseas at the moment.
JohnGaul
NZTS