Altona Weather in September
During September, Altona experiences high daytime temperatures of 30°C (86°F) and cooler nights around 27°C (81°F). As the wettest month of the year, expect frequent rainfall.
Rainfall in Altona in September
Being the wettest month, having an umbrella on standby can help you avoid getting caught in the rain. On average, there are about 18 days with rain during this month, averaging 148 mm (5.8 in). Wet weather is a regular and significant part of this month. Frequent days of rain combined with high totals means proper waterproofs are worth packing.
Temperature in Altona in September
If you're visiting Altona in September, expect highs of 30°C (86°F) and overnight lows around 27°C (81°F). Conditions stay fairly consistent through the month, making it easier to plan what to wear. Nights remain warm at around 27°C (81°F). For a more comfortable sleep, a cold shower before bed and a fan or air conditioning can make a big difference.If you're looking for dry conditions and comfortable temperatures, September may not be the ideal month to visit Altona. 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 US Virgin Islands, check out our Altona's climate page.
Altona Temperature in September
Min Temperature
27°C (81°F)
Max Temperature
30°C (86°F)
Chance of Rain
61%
Precipitation
148 mm (5.8 in)
Rainy days
18 days
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Altona typically stay consistent throughout September, with daily highs averaging around 30°C (86°F). Nights are warm, with lows around 26°C (79°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 Altona in September
Browse day-by-day weather records for Altona spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Altona historical weather extremes in September
According to our 49 years of weather records for Altona, the following extremes were recorded between 1976 and 2025.
- The hottest September day on record in Altona reached 39°C (102°F) (September 7, 2007).
- Altona experienced its chilliest September day on September 4, 1979, reaching only 26°C (79°F).
- The coldest night in September in Altona was on September 4, 1979, with a minimum of 18°C (64°F).
Best Places in US Virgin Islands in September
Find out more about the weather in US Virgin Islands and which places have the best travel conditions in this month. See all of US Virgin Islands in September →
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What to Wear in Altona in September
Warm temperatures in September make for comfortable sightseeing weather. Pack breathable fabrics like cotton shirts, knee-length shorts or skirts, and comfortable walking shoes. A thin long sleeve for indoor spaces is handy. Prepare for significant rainfall with proper waterproof clothing and shoes.What To Do in Altona 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 US Virgin Islands, check out our Altona's climate page.
See the full Altona climate overview or explore weather in US Virgin Islands.
