Tawa’s climate during May 2006 was cooler and calmer than 2005, reflecting a return to the cooler temperatures of 2003 and 2004.
Automatic and manual readings taken at Tawa since 2003 can be summarised as follows:
The lowest May temperatures were 4 °C (2003), 1 °C (2004), 3.2 °C (2005) and 2.2 °C (2006).
The average daily low temperatures were 9 °C (2003), 9 °C (2004), 10 °C (2005) and 9 °C (2006).
The highest May temperatures were 18 °C (2003), 19 °C (2004), 20.8 °C (2005) and 18.1 °C (2006).
The average daily high temperatures were 15 °C (2003), 16 °C (2004), 16 °C (2005) and 15 °C (2006).
Average temperature: 12.9 °C (2005), 11.7 °C(2006).
Average humidity: 88% (2005), 89% (2006)
Days with frost: 1 (2003), none (2004), none (2005) none (2006).
Days with rain: 12 (2003), 14 (2004), 13 (2005), 17 (2006).
Days with thunderstorms: none (2003), none (2004), 1 (2005), none (2006).
Days with hail: none (2003), none (2004), none (2005), none (2006).
Days with strong winds: 4 (2003), 4 (2004), 6 (2005), 2 (2006).
Flood events: none (2003) none (2004), none (2005), none (2006).
Rainfall: 118 mm (2005), 109 mm (2006).
May 2003 started with steady rain on the 2nd, and featured an autumnal downpour just after midnight on the 5th. Early risers were greeted by a frost on the 6th and an air temperature of 1 °C. Strong nor’westerly gales blew for most of the 10th, and calmer conditions then returned. A gusty northerly brought showers on the 19th and 20th, and heavy rain fell on the morning of the 22nd. Conditions again eased until a gusty nor’wester arose on the 30th and 31st.
May 2004 began with 3 days of rain and drizzle and featured three heavy downpours at midnight, 2 a.m. and 5 a.m. on the 4th. Later that day winds from the northwest were gusty and then blew to severe gale on the 5th. Gale force winds continued on the 6th before easing the following day. Calmer conditions then prevailed for the rest of the month.
May 2005 continued the warmer trend which had been experienced during the summer. Steady rain on the 2nd was followed by a downpour just after midnight on the 3rd. Rainy, drizzly conditions with low cloud then prevailed until the 5th. Gusty northerlies late on the 7th were followed by strong southerlies on the 8th. Calmer sunny days then followed until gusty northerlies arose on the 14th. Calm condition then returned, and fog filled the valley on the 20th. Low cloud and drizzly conditions then applied until early on the 22nd. Gusty northerlies blew on the 28th and 29th, followed by gusty southerlies on the 30th. A thunderstorm provided some entertainment overnight on the 29th and 30th.
May 2006 started with low cloud on the 1st and drizzly rain set in on the evening of the 3rd and prevailed until late on the 7th. A cold southerly arrived on the 12th and became gusty that evening. Another southerly arose on the evening of the 14th, and soon rose to gale force, continuing through until late on the 15th. Calm conditions returned and low cloud was noted on the 23rd, and the valley hosted fog on the 24th.
Steady rain on the 26th yielded to low cloud and drizzle on the 27th. Low cloud or fog was noted on 5 days during the month.