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 81.9°F (27.7°C) in August to a still warm 75.2°F (24°C). September in Slonaker sees the temperature falling to a mean low of 57.2°F (14°C).Humidity
The average relative humidity in September in Slonaker is 78%.Rainfall
September is the month with the least rainfall in Slonaker. Rain falls for 12.3 days and accumulates 1.81" (46mm) of precipitation.Snowfall
May through October are months without snowfall in Slonaker.Daylight
In September, the average length of the day is 12h and 26min.On the first day of September in Slonaker, sunrise is at 6:30 am and sunset at 7:33 pm. On the last day of the month, sunrise is at 6:58 am and sunset at 6:45 pm EDT.
Sunshine
In Slonaker, the average sunshine in September is 8.8h.UV index
The average daily maximum UV index in September in Slonaker is 4. A UV Index estimate of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The maximum UV index of 4 during September translates into these guidelines:
Preventative actions are necessary - Suggestions to safeguard against sun damage are in order. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures in Slonaker?
What is the average humidity in September in Slonaker?
What is the driest month in Slonaker?
How much does it rain in Slonaker in September?
When it does not snow in Slonaker?
What is the average length of the day in September in Slonaker?
What time are sunrise and sunset in September in Slonaker?
How long on average sun shines in September in Slonaker?
What is the UV index intensity in September in Slonaker?
Average temperature in September
Slonaker, PA
- Average high temperature in September: 75.2°F
The warmest month (with the highest average high temperature) is July (84.2°F).
The month with the lowest average high temperature is January (35.4°F).
- Average low temperature in September: 57.2°F
The month with the highest average low temperature is July (65.5°F).
The coldest month (with the lowest average low temperature) is January (23.2°F).
Average pressure in September
Slonaker, PA
- Average pressure in September: 30.06"Hg
The month with the highest atmospheric pressure is November (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in September
Slonaker, PA
- Average wind speed in September: 5.5mph
The windiest month (with the highest average wind speed) is March (8.1mph).
The calmest month (with the lowest average wind speed) is August (5mph).
Average humidity in September
Slonaker, PA
- Average humidity in September: 78%
The months with the highest relative humidity are February and October (80%).
The months with the lowest relative humidity are April and July (75%).
Average rainfall in September
Slonaker, PA
- Average rainfall in September: 1.81"
The wettest month (with the highest rainfall) is August (3.15").
The driest month (with the least rainfall) is September (1.81").
Average rainfall days in September
Slonaker, PA
- Average rainfall days in September: 12.3 days
The months with the highest number of rainy days are May and July (17 days).
The month with the least rainy days is January (7.3 days).
Average snowfall in September
Slonaker, PA
- Average snowfall in September: 0"
The month with the highest snowfall is March (3.7").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Slonaker, PA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (5.8 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Slonaker, 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 36min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).
Average sunshine days in September
Slonaker, PA
- Average sunshine days in September: 16.4 days
The month with the most sunshine days is November (21 days).
The month with the least sunshine days is May (12.3 days).
Average UV index in September
Slonaker, 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
Slonaker, PA
- Average cloud cover in September: 38
The month with the most cloud cover is February (Cloud cover 49).
The month with the least cloud cover is July (Cloud cover 32).
Average visibility in September
Slonaker, 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).
Slonaker, Pennsylvania, USA
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