Philipsburg weather in September
September in Philipsburg: hot, rainy, with clean air — an excellent time to visit.
#11 of 12 months in Philipsburg · #312 of 604 destinations to visit in September · comfort 80/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Philipsburg climate normals — September
| Daytime high | 29°C / 83°F | 🥵 hot |
|---|---|---|
| Nighttime low | 27°C / 80°F | |
| Feels like (high) | 33°C / 91°F | |
| Rainfall | 109 mm / 4.3 in | 🌧 rainy |
| Rainy days | 17 days | |
| Humidity | 81% | 💦 very humid |
| Dew point | 24°C / 76°F | |
| Sunshine | 10.9 h/day | |
| Daylight | 12.2 h | |
| Wind | 26 km/h / 16 mph | |
| Air quality (US AQI) | 35 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Philipsburg in September — FAQ
- Is September a good time to visit Philipsburg?
- September in Philipsburg: hot, rainy, with clean air — an excellent time to visit. It ranks #11 of 12 months for Philipsburg on SeasonMap's comfort score (80/100).
- What is the weather like in Philipsburg in September?
- In September, Philipsburg averages a daily high of 28.5°C and a low of 26.9°C, with about 109.1 mm of rain over roughly 16.8 rainy days.
- What is the air quality in Philipsburg in September?
- Philipsburg has a mean US Air Quality Index of about 35 in September.