New Zealand is in the southern hemisphere so the seasons are opposite to those of the northern hemisphere.
Summer - January or February are the warmest months with a maximum temperature range between 20 and 30 degs Celsius. Sunshine hours are relatively high - most areas having at least 2000 hours annually. The midday summer solar radiation index (UVI) is very high and we recommend that sun block be used at all times, winter and summer.
Winter - July and August the coldest with temperatures between 9 and 13 degs Celsius. Generally snow falls in the mountain areas.
The 2 long Islands and the mountain chain extending the length of the country providing a barrier for the prevailing westerly winds, divides the country into dramatically different climatic regions. The West Coast is the wettest area, whereas the area to the East of the mountains (just 100 kms) is the driest. See latest NZ weather update here.
Helpful reading by our travel blog 'TheOutsideOffice':
*** What is the best time to travel New Zealand (Seasons)
*** Travelling New Zealand in a Motorhome vs Rental car
*** Motorhome travel in New Zealand winter
*** Choosing the right motorhome for New Zealand
*** Make good use of domestic flight in New Zealand
*** New Zealand farmstay experiences
plus many more stories on travelling in NZ...
If you are travelling around New Zealand you are bound to bump into most types of weather. The safest policy is to be equipped for all weather no matter what the season. Wear layers of clothing to strip off and replace as necessary. Wet weather gear, a wind proof jacket, woollen sweater and strong comfortable footwear are all recommended. In keeping with New Zealand's relaxed lifestyle, dress is informal on most occasions with smart casual clothes in most restaurants. A smart standard of dress will be required for better restaurants, Shows and Casinos.
Medical and Emergency Facilities:
Dial 111 for emergency calls to police, fire or ambulance services.
Medical and emergency services are not free to visitors; it is therefore advisable to arrange for insurance coverage before your departure.
For non-emergencies, full instructions on obtaining assistance are printed in the front of all telephone directories and accommodation facilities will usually have individual arrangements with duty doctors for guests and can assist you in finding a dentist. New Zealand's medical and hospital facilities provide a high standard of treatment and care.
New Zealand suffers only isolated incidences of serious crime however petty crime can be a problem in some areas. Take precautions to conceal and secure valuables and never leave them in your vehicle as tourists do seem to be targeted by thieves.
We strongly recommend travel insurance for the entire time you plan to be overseas. GUEST NZ is able to assist with this insurance and recommend that your policy covers emergency medical situations, baggage loss or damage, and expenses incurred from disrupted travel plans.
Electricity is 240 volts via a slant pin outlet. Hotels often provide a 110-volt socket for electric shavers only. For all other equipment, an adapter and a converter are necessary.