Whanganui in Winter
In winter (June, July and August), Whanganui sees average daytime highs around 12°C and overnight lows near 9°C, with 316 mm of rain over about 43 wet days across the season. It is the coldest season of the year and the wettest season of the year.
Across winter, daytime highs hold fairly steady around 12°C. The sky is clear or mostly clear about 30% of the time across winter, and the air most often feels dry.
Winter is Whanganui's weakest season of the year to visit on our travel score. For the whole year in context, see Whanganui's year-round climate.
- Avg daytime high
- 12°C
- coldest season of the year
- Avg overnight low
- 9°C
- Rainfall
- 316 mm
- 43 wet days
- Avg wind
- 22 km/h
- Travel score
- 3.0
- weakest season of the year
- Months
- Jun · Jul · Aug
Temperature in Whanganui in Winter
Across winter, daytime highs hold fairly steady around 12°C.
A typical winter day in Whanganui reaches about 12°C and drops to 9°C overnight. The warmest of the three months is June, the coolest July.
Whanganui weather by month
How the three winter months (June, July and August) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 19° / 15° | 71 | 9.3 | 14.5 | 6.3 |
| Feb | 20° / 16° | 66 | 8.1 | 13.6 | 6.5 |
| Mar | 18° / 15° | 68 | 9.6 | 12.3 | 6.2 |
| Apr | 17° / 13° | 98 | 11 | 11 | 5.2 |
| May | 15° / 11° | 97 | 12.4 | 9.8 | 4.3 |
| Jun | 13° / 10° | 109 | 14.1 | 9.2 | 3.2 |
| Jul | 12° / 9° | 105 | 14.3 | 9.5 | 2.9 |
| Aug | 12° / 9° | 102 | 14.7 | 10.4 | 3.0 |
| Sep | 13° / 10° | 97 | 13.6 | 11.7 | 3.4 |
| Oct | 14° / 11° | 107 | 14.2 | 13.1 | 3.8 |
| Nov | 16° / 12° | 89 | 12.2 | 14.2 | 4.6 |
| Dec | 17° / 14° | 100 | 12.7 | 14.8 | 5.4 |
Cloud cover in Winter
The sky is clear or mostly clear about 30% of the time across winter.
Chance of precipitation in Winter
Whanganui gets around 316 mm of rain over 43 wet days across winter. The line is the day-by-day chance of measurable precipitation.
Humidity in Winter
Most of winter feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Winter
Winds average 22 km/h across winter.
Sunrise & sunset in Winter
Daylight runs from about 9 h 24 min in early June to 11 hours by late August. The lit band spans sunrise to sunset each day.
Solar energy in Winter
Average shortwave solar energy reaching the ground each day across winter, about 2.1 kWh/m².
Is winter a good time to visit Whanganui?
Our two travel scores rate winter for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
winter is a weaker month for outdoor sightseeing in Whanganui.
What to pack for Whanganui in Winter
From winter's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In winter, Whanganui sees daytime highs around 12°C and nights near 9°C. Pack a warm layer and rain gear. Worth having: a windbreaker. About 43 days see rain.
Sea temperature near Whanganui in Winter
The nearest coast averages about 13°C across winter — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 16 km away) is warmest in February at about 19°C and coldest in August near 13°C.
The water stays below 20°C all year — cool enough that most swimmers want a wetsuit.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 18 | 19 | 18 | 17 | 16 | 14 | 13 | 13 | 13 | 14 | 15 | 16 |
| Comfort | Cool | Cool | Cool | Cool | Cool | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Cool |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 18 | Cool |
| Feb | 19 | Cool |
| Mar | 18 | Cool |
| Apr | 17 | Cool |
| May | 16 | Cool |
| Jun | 14 | Bracing |
| Jul | 13 | Bracing |
| Aug | 13 | Bracing |
| Sep | 13 | Bracing |
| Oct | 14 | Bracing |
| Nov | 15 | Bracing |
| Dec | 16 | Cool |
UV index in Whanganui in Winter
Clear-sky midday UV across winter averages around 2. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Whanganui peaks around January 12 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 17 at about 2 (low).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 9 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 12 | 11 | 7 | 5 | 2 | 2 | 2 | 3 | 4 | 7 | 10 | 11 |
| Level | Extreme | Extreme | High | Moderate | Moderate | Low | Moderate | Moderate | Moderate | High | Very high | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 12 | Extreme |
| Feb | 11 | Extreme |
| Mar | 7 | High |
| Apr | 5 | Moderate |
| May | 2 | Moderate |
| Jun | 2 | Low |
| Jul | 2 | Moderate |
| Aug | 3 | Moderate |
| Sep | 4 | Moderate |
| Oct | 7 | High |
| Nov | 10 | Very high |
| Dec | 11 | Extreme |
Where is Whanganui?
Whanganui sits at 39.9°S, 175.1°E, 18 m above sea level, in New Zealand. The nearest listed city is Palmerston North, 67 km away.
Topography around Whanganui
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Whanganui.
Within 3 km, the terrain around Whanganui has only modest variations in elevation — a maximum elevation change of 103 m around an average of 28 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 300 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,746 m.
The land around Whanganui is covered by grassland (39%), artificial surfaces (28%) and trees (25%) within 3 km, grassland (42%), water (32%) and trees (22%) within 16 km, and grassland (44%), trees (29%) and water (25%) within 80 km.
New Zealand travel facts
- Travel advisory
- Level 1
- Exercise Normal Precautions
- Power plugs
- Type I
- 230 V · 50 Hz
- Prices
- ≈ 86% of US
- price level, 2025
- GDP per capita
- $49,591
- 2025
- Happiness
- 7.0 / 10
- World Happiness, 2025
- Safe drinking water
- 100%
- of population, 2024
- Homicide rate
- 1.5
- per 100k, 2022
- Road deaths
- 9.6
- per 100k/yr, 2019
- Income group
- High
- World Bank
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Whanganui (-39.9333°, 175.05°, elevation 18 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google.