Whanganui Weather in September
Whanganui in September sees moderate temperatures, with highs around 15°C (59°F) and overnight lows of 9°C (48°F). Rainfall is fairly high at around 110 mm (4.3 in) on average, so pack waterproofs just in case.
Rainfall in Whanganui in September
You can typically expect 15 days of rain this month, averaging around 110 mm (4.3 in). The rain this month tends to fall in heavier spells rather than light drizzle. When it rains, showers can be significant.
Temperature in Whanganui in September
In September, Whanganui sees moderate temperatures, with highs of 15°C (59°F). Nights drop to around 9°C (48°F). Conditions are often most pleasant around the middle of the day. With overnight lows of 9°C (48°F), nights are cold. The cold air does make for deep, comfortable sleep if you have enough blankets.
Sunshine in Whanganui in September
The month experiences a moderate amount of sunlight, with 125 hours of sunshine. This provides a nice balance between sunshine and clouds.If you prefer dry days with pleasant temperatures, January, February and March typically offer 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.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit New Zealand, check out our Whanganui's climate page.
Whanganui Temperature in September
Min Temperature
9°C (48°F)
Max Temperature
15°C (59°F)
Chance of Rain
49%
Precipitation
110 mm (4.3 in)
Rainy days
15 days
Humidity
80% *
Sunshine
125 hours *
Percentage Sunshine
*
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Whanganui typically stay consistent throughout September, with daily highs averaging around 15°C (59°F). Nights are cold, with lows typically ranging from 5°C (41°F) to 8°C (46°F).
Average temperatures in September
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 September
Historical weather for Whanganui in September
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 September
The extremes listed below come from historical weather data collected in Whanganui from 1976 through 2025.
- On September 19, 1988, temperatures climbed to 21°C (70°F), marking the warmest September day on record.
- The lowest daytime temperature in September was 6°C (43°F), recorded on September 8, 1994.
- The lowest overnight temperature recorded in September was -3°C (27°F) (September 5, 2009).
Best Places in New Zealand in September
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 September →
perfect weather
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What to Wear in Whanganui in September
Pack for changing conditions in Whanganui in September. 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. Bring sunglasses since you'll have some sunny periods throughout the monthWhat To Do in Whanganui in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit New Zealand, check out our Whanganui's climate page.
Temperature Rainfall Sunshine Humidity
See the full Whanganui climate overview or explore weather in New Zealand.
