Cool
Average highs are around 17°C, so pack for cooler days.
September verdict
St. Mary, United States in September
Weather score40Poor
Poor for holiday weather
Average highs are around 17°C, so pack for cooler days. Sunshine averages 6.9h per day, enough for a balanced month. Rainfall averages 48mm, which is relatively low for holiday planning.
September weather
Monthly averages
Temp
17°C
Rain
48mm
Sun
6.9h
Weather score
40
Poor
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
Weather scoreWeather score
Trip feel
Drier
Rainfall averages 48mm, which is relatively low for holiday planning.
Some sun
Sunshine averages 6.9h per day, enough for a balanced month.
Map
Weather map
Compare St. Mary, United States with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
September17°C average high
September sits in the warmer part of the year, so midday sightseeing can feel heavier than in cooler months.
Warmest monthsJune to September
This stretch sets the upper range for average daytime heat.
Rain
September48mm average rain
September sits near St. Mary's yearly rainfall average, so rain is a normal planning factor rather than an outlier.
Driest monthsJanuary to April and July to December
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
September6.9 hours average sun
September sits close to St. Mary's yearly sunshine average, so it is a middle-of-the-pack month for bright days.
Brightest monthsJuly to August
This stretch has the strongest sunshine in the monthly averages.
Weather score
September40 weather score
September scores below St. Mary's yearly average, so the weather trade-offs are more noticeable.
Best weather monthsJuly to August
These months have the strongest weather score in the monthly averages.
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