Cromwell Weather in September
September in Cromwell typically sees daytime highs of 9°C (48°F) and nighttime lows of -1°C (30°F). Rainfall is also possible this month, so it's worth packing an umbrella.
Rainfall in Cromwell in September
The climate data from previous years indicates about 7 days of snow/rain, averaging 91 mm (3.6 in) for the month. When showers do arrive, they tend to be on the heavier side. Worth being prepared even if rain days are not that numerous.
Temperature in Cromwell in September
Temperatures in Cromwell in September top out at 9°C (48°F) and drop to -1°C (30°F) overnight. The days stay cool from start to finish. Layering up well will make outdoor time much more comfortable. With lows of -1°C (30°F), nights are freezing. Packing a spare blanket is worth considering if you're staying somewhere that might not be fully heated.
Sunshine in Cromwell in September
The month brings about 172 hours of sunlight, offering a comfortable mix of sun and overcast.If you're looking for dry conditions and comfortable temperatures, September may not be the ideal month to visit Cromwell. Our weather planner can help you explore destinations with more pleasant weather conditions.
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 Cromwell's climate page.
Cromwell Temperature in September
Min Temperature
-1°C (30°F)
Max Temperature
9°C (48°F)
Chance of Rain
25%
Precipitation
91 mm (3.6 in)
Rainy days
7 days
Sunshine
172 hours *
Percentage Sunshine
*
Daily Historical Temperatures
31-year average (1995-2025)
Based on our historical records, temperatures in Cromwell typically stay consistent throughout September, with daily highs averaging around 9°C (48°F). Nights are cold, with lows typically ranging from 0°C (32°F) to 3°C (37°F).
Average temperatures in September
Daily Historical Precipitation
31-year average (1995-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in September
Historical weather for Cromwell in September
Browse day-by-day weather records for Cromwell spanning 32 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Cromwell historical weather extremes in September
Based on 30 years of weather observations in Cromwell between 1995 and 2025, these are the recorded extremes.
- On September 14, 2009, temperatures climbed to 22°C (72°F), marking the warmest September day on record.
- The coldest September day was on September 23, 2003, with a maximum of 2°C (36°F).
- The coldest night in September in Cromwell was on September 4, 2009, with a minimum of -13°C (9°F).
- The wettest September day on record brought 52 mm (2 in) of precipitation to Cromwell (September 22, 2023).
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 →
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What to Wear in Cromwell in September
We recommend to layer up for chilly conditions in Cromwell in September. You could start with thermal underwear or a good base layer to keep your core warm on the cooler days this month. Maybe also add a sweater or fleece, and top it off with a windproof jacket. High rain levels are expected, so pack waterproof gear and an umbrella or poncho. Bring sunglasses since you'll have some sunny periods throughout the monthWhat To Do in Cromwell 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 Cromwell's climate page.
See the full Cromwell climate overview or explore weather in New Zealand.
