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
The average high-temperature slightly decreases in September, shifting from a moderately hot 81.3°F (27.4°C) in August to a still warm 74.3°F (23.5°C). Mount Holly Springs experiences an average nighttime temperature of 55.8°F (13.2°C) in the month of September.Humidity
In September, the average relative humidity is 78%.Rainfall
In Mount Holly Springs, during September, the rain falls for 10.4 days and regularly aggregates up to 0.79" (20mm) of precipitation. Throughout the year, in Mount Holly Springs, there are 123.7 rainfall days, and 12.09" (307mm) of precipitation is accumulated.Snowfall
In Mount Holly Springs, snow does not fall in May through September.Daylight
In Mount Holly Springs, the average length of the day in September is 12h and 26min.On the first day of September in Mount Holly Springs, Pennsylvania, sunrise is at 6:37 am and sunset at 7:39 pm. On the last day of the month, sunrise is at 7:04 am and sunset at 6:52 pm EDT.
Sunshine
In Mount Holly Springs, the average sunshine in September is 8.9h.UV index
In Mount Holly Springs, the average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for average individuals.Note: The UV index of 4 in September translates into these instructions:
Act with care - The need to guard against sun damage is communicated. To guard against the harmful effects of the Sun, minimize exposure during midday. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days.
Frequently asked questions
What are September temperatures in Mount Holly Springs?
What is the average humidity in September in Mount Holly Springs?
How much does it rain in Mount Holly Springs in September?
When it does not snow in Mount Holly Springs?
Does it snow in Mount Holly Springs in September?
How many hours of daylight does Mount Holly Springs have in September?
What time are sunrise and sunset in September in Mount Holly Springs?
How long on average sun shines in September in Mount Holly Springs?
What is the UV index intensity in September in Mount Holly Springs?
Average temperature in September
Mount Holly Springs, PA
- Average high temperature in September: 74.3°F
The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is January (35.1°F).
- Average low temperature in September: 55.8°F
The month with the highest average low temperature is July (63.7°F).
The coldest month (with the lowest average low temperature) is January (22.3°F).
Average pressure in September
Mount Holly Springs, PA
- Average pressure in September: 30.06"Hg
The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).
Average wind speed in September
Mount Holly Springs, PA
- Average wind speed in September: 5.3mph
The windiest month (with the highest average wind speed) is March (8.1mph).
The calmest months (with the lowest average wind speed) are July and August (4.8mph).
Average humidity in September
Mount Holly Springs, PA
- Average humidity in September: 78%
The month with the highest relative humidity is February (80%).
The months with the lowest relative humidity are April and July (75%).
Average rainfall in September
Mount Holly Springs, PA
- Average rainfall in September: 0.79"
The wettest month (with the highest rainfall) is May (1.34").
The driest months (with the least rainfall) are January and February (0.75").
Average rainfall days in September
Mount Holly Springs, PA
- Average rainfall days in September: 10.4 days
The month with the highest number of rainy days is May (14.7 days).
The month with the least rainy days is January (5.3 days).
Average snowfall in September
Mount Holly Springs, PA
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.5").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Mount Holly Springs, PA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (7.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Mount Holly Springs, PA
- Average daylight in September: 12h and 2min
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 24min).
- Average sunshine in September: 8h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).
Average sunshine days in September
Mount Holly Springs, PA
- Average sunshine days in September: 17.7 days
The month with the most sunshine days is November (21.5 days).
The month with the least sunshine days is May (13.8 days).
Average UV index in September
Mount Holly Springs, PA
- Average UV index in September: 4
The months with the highest UV index are May, June and July (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
Mount Holly Springs, PA
- Average cloud cover in September: 37
The month with the most cloud cover is February (Cloud cover 50).
The month with the least cloud cover is July (Cloud cover 31).
Average visibility in September
Mount Holly Springs, PA
- Average visibility in September: 5mi
The months with the highest visibility are January, February, March, April, June, July, August, October, November and December (6mi).
The months with the lowest visibility are May and September (5mi).
Mount Holly Springs, Pennsylvania, USA
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