Tawa’s climate during April 2007 was cooler and drier than April last year but similar to conditions recorded in the period 2003 to 2005.
Automatic and manual readings taken at Tawa since 2003 can be summarised as follows:
The lowest April temperatures were 4 °C (2003), 3 °C (2004), 2.9 °C (2005), 6.2 °C (2006), 5.1 ºC (2007).
The average daily low temperatures were 9 °C (2003), 8 °C (2004), 9 °C (2005), 12 °C (2006), 9 ºC (2007).
The highest April temperatures were 23 °C (2003), 22 °C (2004), 24.2 °C (2005), 22.3 °C (2006), 22.7 ºC (2007).
The average daily high temperatures were 17 °C (2003), 17 °C (2004), 18 °C (2005), 19 °C (2006), 18 ºC (2007).
Average temperature: 13.3 °C (2005), 15.3 °C(2006), 13.5 ºC (2007).
Average humidity: 84% (2005), 86% (2006), 84% (2007).
Days with frost: none (2003), none (2004), none (2005) none (2006), none (2007).
Days with rain: 11 (2003), 8 (2004), 11 (2005), 16 (2006), 10 (2007).
Days with thunderstorms: 1 (2003), none (2004), 1 (2005), 3 (2006), none (2007).
Days with hail: none (2003), none (2004), 2 (2005), none (2006), none (2007).
Days with strong winds: 3 (2003), 1 (2004), 4 (2005), 5 (2006), 4 (2007).
Rainfall: 35 mm (2005), 82 mm (2006), 54 mm (2007).
April 2003 was unremarkable except for cold southerlies which blew on the 5th, 17th, 18th, 24th and 28th. Thunderstorms between 9 p.m. and midnight on the 5th provided entertainment on a night of light winds and intermittent downpours.
April 2004 was also unremarkable with weather conditions alternating between mild sunny days and cloudy misty conditions. Foggy conditions were noted on the 30th.
April 2005 was livelier, with alternating calm and windy periods. Squalls brought intermittent downpours on the 21st and thunderstorms brought hail on the morning of the 24th. That evening, thunderstorms returned in earnest, delivering icy downpours and hail for several hours. Electricity supplies were disrupted and computers and other appliances were tied in knots by numerous power flicks. The evening’s lightning displays were most impressive.
April 2006 featured calm periods with low cloud and fog recorded on 7 days, punctuated by lively storms. Just before midnight on the 8th a thunderstorm put on a fine show, attended by intermittent downpours. The thunderstorms continued at times on the 9th and 10th, and were covered by a separate story on this site.
The many calm days allowed low cloud or fog to be recorded on 7 days during April 2006 and also account for the increased count of “rain days” as damp drizzly conditions with rain rates too low to trigger the weather station’s rain gauge applied on 4 days during the month.
April 2007 started with a gusty northerly on the 1st, but this soon yielded to light breezes or still conditions until the 10th when a gusty northerly rose through the scale to become gale force on the afternoon of the 11th. The wind changed to the south the following day and minimum temperatures plunged to single digits as we adapted to the first wet, chill southerly for some weeks.
The sun returned on the 14th and still conditions prevailed until a cold wet southerly returned on the 18th. Once again, calm conditions returned on the 19th and held sway until the month’s end with steady rain and low cloud making the 28th a dreary day.
The weather seemed to break with tradition on Anzac Day 2007 when almost the entire country enjoyed fine weather for the April 25th commemorative activities.