Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
Helfenstein in September undergoes a slight reduction in the average high-temperature, shifting from August's moderately hot 79.3°F (26.3°C) to a pleasant 72.9°F (22.7°C). In September, the nighttime temperature lowers to an average of 53.6°F (12°C).Humidity
The average relative humidity in September is 80%.Rainfall
In Helfenstein, Pennsylvania, in September, during 9.8 rainfall days, 1.02" (26mm) of precipitation is typically accumulated. In Helfenstein, during the entire year, the rain falls for 129.2 days and collects up to 16.42" (417mm) of precipitation.Snowfall
In Helfenstein, snow does not fall in June through September.Daylight
The average length of the day in September in Helfenstein is 12h and 27min.On the first day of the month, sunrise is at 6:33 am and sunset at 7:37 pm. On the last day of September, in Helfenstein, sunrise is at 7:02 am and sunset at 6:49 pm EDT.
Sunshine
In Helfenstein, the average sunshine in September is 8.7h.UV index
The average daily maximum UV index in September in Helfenstein is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for average individuals.Note: The daily high UV index of 4 in September translates into this advice:
Act with care - Obligation to protect against skin and eye damage is highlighted. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage.
Frequently asked questions
What is the average September temperature in Helfenstein?
What is the average humidity in September in Helfenstein?
How many days does it rain in September in Helfenstein?
When it does not snow in Helfenstein?
Does it snow in Helfenstein in September?
What is the average length of the day in September in Helfenstein?
When is the sunrise / sunset in September in Helfenstein?
How many hours of sunshine does Helfenstein have in September?
What is the UV index intensity in September in Helfenstein?
Average temperature in September
Helfenstein, PA
- Average high temperature in September: 72.9°F
The warmest month (with the highest average high temperature) is July (81.5°F).
The month with the lowest average high temperature is January (32°F).
- Average low temperature in September: 53.6°F
The month with the highest average low temperature is July (61.2°F).
The coldest month (with the lowest average low temperature) is January (20.1°F).
Average pressure in September
Helfenstein, PA
- Average pressure in September: 30.07"Hg
The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in September
Helfenstein, PA
- Average wind speed in September: 5.5mph
The windiest months (with the highest average wind speed) are March and April (8.3mph).
The calmest month (with the lowest average wind speed) is August (4.7mph).
Average humidity in September
Helfenstein, PA
- Average humidity in September: 80%
The month with the highest relative humidity is February (82%).
The months with the lowest relative humidity are March and April (77%).
Average rainfall in September
Helfenstein, PA
- Average rainfall in September: 1.02"
The wettest months (with the highest rainfall) are May and July (1.97").
The driest month (with the least rainfall) is February (0.98").
Average rainfall days in September
Helfenstein, PA
- Average rainfall days in September: 9.8 days
The month with the highest number of rainy days is May (15.4 days).
The month with the least rainy days is January (5.8 days).
Average snowfall in September
Helfenstein, PA
- Average snowfall in September: 0"
The month with the highest snowfall is February (2.2").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Helfenstein, PA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Helfenstein, PA
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in September: 8h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is February (Average sunshine: 4h and 6min).
Average sunshine days in September
Helfenstein, PA
- Average sunshine days in September: 17.5 days
The month with the most sunshine days is November (20.4 days).
The month with the least sunshine days is May (12.5 days).
Average UV index in September
Helfenstein, PA
- Average UV index in September: 4
The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in September
Helfenstein, PA
- Average cloud cover in September: 38
The month with the most cloud cover is February (Cloud cover 56).
The month with the least cloud cover is July (Cloud cover 33).
Average visibility in September
Helfenstein, PA
- Average visibility in September: 5mi
The months with the highest visibility are March, April, November and December (6mi).
The months with the lowest visibility are January, February, May, June, July, August, September and October (5mi).
Helfenstein, Pennsylvania, USA
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