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Whanganui Weather in August

Whanganui in August sees moderate temperatures, with highs around 14°C (57°F) and overnight lows of 8°C (46°F). Rainfall is fairly high at around 107 mm (4.2 in) on average, so pack waterproofs just in case.

Rainfall in Whanganui in August

Based on our climate data of the past 30 years, about 15 days of rain are anticipated, with 107 mm (4.2 in) on average. This is a wet month with frequent and often heavy showers. Both the number of rain days and the total rainfall are high.

Temperature in Whanganui in August

Whanganui in August gets highs of 14°C (57°F) during the day and drops to 8°C (46°F) at night. Even when the weather is stable, mornings and evenings can still feel distinctly cool. With overnight lows of 8°C (46°F), nights are cold. The cold air does make for deep, comfortable sleep if you have enough blankets.

Sunshine in Whanganui in August

The city usually sees around 121 hours of sunlight, indicating a moderately sunny period.

For Whanganui itself, January, February and March generally stand out with the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.

Whanganui Temperature in August

Min Temperature

8°C (46°F)

Max Temperature

14°C (57°F)

Chance of Rain

51%

Precipitation

107 mm (4.2 in)

Rainy days

15 days

Humidity

84% *

Sunshine

121 hours *

Percentage Sunshine

* Data from: Palmerston North, New Zealand (66 KM, 41 Miles).

Whanganui Weather by Month

Pick a month to see the average temperature, rainfall and sunshine in Whanganui - and find the best time to visit.

January

21°C (70°F)View January → February

22°C (72°F)View February → March

21°C (70°F)View March → April

18°C (64°F)View April → May

16°C (61°F)View May → June

14°C (57°F)View June → July

13°C (55°F)View July → August

14°C (57°F)View August → September

15°C (59°F)View September → This monthOctober

16°C (61°F)View October → November

18°C (64°F)View November → December

20°C (68°F)View December →

Best Time to Visit Whanganui →

Daily Historical Temperatures

50-year average (1976-2025)

Based on our historical records, temperatures in Whanganui typically stay consistent throughout August, with daily highs averaging around 14°C (57°F). Nights are cold, with lows around 5°C (41°F).

Average temperatures in August

Daily Historical Precipitation

50-year average (1976-2025)

Average daily rainfall for each day of the month based on long-term records.

Average precipitation in August

Historical weather records for Whanganui in August

Browse day-by-day weather records for Whanganui spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.

Whanganui historical weather extremes in August

According to our 33 years of weather records for Whanganui, the following extremes were recorded between 1993 and 2026.

Whanganui recorded its highest August temperature of 18°C (64°F) on August 31, 1999.
The coldest August day was on August 25, 2004, with a maximum of 5°C (41°F).
The coldest night in August in Whanganui was on August 24, 2006, with a minimum of -4°C (25°F).
Peak precipitation in August occurred on August 18, 2024, when 28 mm (1.1 in) of precipitation was measured.

Best Places in New Zealand in August

Find out more about the weather in New Zealand and which places have the best travel conditions in this month. See all of New Zealand in August →

Conditions Temperatures Precipitation

Temperatures Precipitation

perfect weather

pleasant

tolerable

unpleasant

poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).

Marker color shows the average daytime high temperature in August: blue is cold, red is hot.

Marker color shows total monthly precipitation in August: pale blue is dry, deep blue is wet.

What to Wear in Whanganui in August

Pack for changing conditions in Whanganui in August. Bring a mix of short and long sleeves, a warm layer like a hoodie or light jacket, and comfortable pants. The key is being able to add or remove layers as the days goes by. Prepare for significant rainfall with proper waterproof clothing and shoes. It won't hurt to bring your sunglasses along, as you'll see some sunny periods.