September weather forecastYardley, PA
September
Weather in September
The first month of the autumn, September, is still a warm month in Yardley, Pennsylvania, with an average temperature ranging between min 59.2°F (15.1°C) and max 76.1°F (24.5°C).Temperature
A subtle shift in Yardley's weather is observed as August turns into September, with the average high temperature reducing from 82.9°F (28.3°C) to a still warm 76.1°F (24.5°C). Yardley, during September nights, observes an average temperature of 59.2°F (15.1°C).Humidity
In September, the average relative humidity in Yardley is 76%.Rainfall
September is the month with the least rainfall. Rain falls for 8.6 days and accumulates 0.51" (13mm) of precipitation.Snowfall
June through October are months without snowfall.Daylight
The average length of the day in September is 12h and 27min.On the first day of the month, sunrise is at 6:27 am and sunset at 7:30 pm. On the last day of September, sunrise is at 6:55 am and sunset at 6:42 pm EDT.
Sunshine
In Yardley, the average sunshine in September is 8.8h.UV index
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 unsafe exposure to UV radiation for ordinary individuals.Note: In September, the UV index of 4 transforms into the following advice:
Undertake precautions - It is suggested to shield oneself from sunburn. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Yardley, PA
- Average high temperature in September: 76.1°F
The warmest month (with the highest average high temperature) is July (85.5°F).
The month with the lowest average high temperature is January (36.9°F).
- Average low temperature in September: 59.2°F
The month with the highest average low temperature is July (67.1°F).
The coldest month (with the lowest average low temperature) is January (24.3°F).
Average pressure in September
Yardley, PA
- Average pressure in September: 30.05"Hg
The month with the highest atmospheric pressure is November (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
Yardley, PA
- Average wind speed in September: 5.8mph
The windiest month (with the highest average wind speed) is March (8.6mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).
Average humidity in September
Yardley, PA
- Average humidity in September: 76%
The months with the highest relative humidity are February, October and December (78%).
The month with the lowest relative humidity is April (72%).
Average rainfall in September
Yardley, PA
- Average rainfall in September: 0.51"
The wettest month (with the highest rainfall) is July (1.26").
The driest month (with the least rainfall) is September (0.51").
Average rainfall days in September
Yardley, PA
- Average rainfall days in September: 8.6 days
The month with the highest number of rainy days is May (13.1 days).
The month with the least rainy days is January (6.4 days).
Average snowfall in September
Yardley, PA
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.71").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in September
Yardley, PA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (4.5 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Yardley, PA
- Average daylight in September: 12h and 24min
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 48min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).
Average sunshine days in September
Yardley, PA
- Average sunshine days in September: 19.3 days
The month with the most sunshine days is January (21.9 days).
The month with the least sunshine days is June (14.8 days).
Average UV index in September
Yardley, PA
- Average UV index in September: 4
The months with the highest UV index are May, June, July and August (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
Yardley, PA
- Average cloud cover in September: 38
The months with the most cloud cover are February and December (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 32).
Average visibility in September
Yardley, PA
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is May (5mi).
