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
Start of September brings a slight shift in the average high-temperature, dipping a bit from August's moderately hot 81.7°F (27.6°C) to a still warm 74.8°F (23.8°C). During September, Fairfield witnesses a consistent average low-temperature of 55.9°F (13.3°C).Humidity
The average relative humidity in September in Fairfield is 79%.Rainfall
The month with the least rainfall is September, when the rain falls for 10 days and typically collects 0.55" (14mm) of precipitation.Snowfall
In Fairfield, snow does not fall in May through October.Daylight
The average length of the day in September in Fairfield is 12h and 26min.On the first day of September in Fairfield, sunrise is at 6:38 am and sunset at 7:40 pm. On the last day of the month, sunrise is at 7:05 am and sunset at 6:53 pm EDT.
Sunshine
In Fairfield, the average sunshine in September is 8.7h.UV index
The average daily maximum UV index in September in Fairfield is 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: The UV index of 4 in September translates into these instructions:
Put precautions into practice - Ensuring skin and eye safety is a necessity. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat.
Frequently asked questions
What are September temperatures in Fairfield?
What is the average humidity in September in Fairfield?
What is the driest month in Fairfield?
How many days does it rain in September in Fairfield?
When it does not snow in Fairfield?
What is the average length of the day in September in Fairfield?
What time are sunrise and sunset in September in Fairfield?
How many hours of sunshine does Fairfield have in September?
What is the UV index intensity in September in Fairfield?
Average temperature in September
Fairfield, PA
- Average high temperature in September: 74.8°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: 55.9°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 (22.6°F).
Average pressure in September
Fairfield, 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
Fairfield, PA
- Average wind speed in September: 5.3mph
The windiest month (with the highest average wind speed) is January (8mph).
The calmest months (with the lowest average wind speed) are July and August (4.7mph).
Average humidity in September
Fairfield, PA
- Average humidity in September: 79%
The months with the highest relative humidity are February, May and October (80%).
The month with the lowest relative humidity is July (75%).
Average rainfall in September
Fairfield, PA
- Average rainfall in September: 0.55"
The wettest month (with the highest rainfall) is May (1.26").
The driest month (with the least rainfall) is September (0.55").
Average rainfall days in September
Fairfield, PA
- Average rainfall days in September: 10 days
The month with the highest number of rainy days is May (14.9 days).
The month with the least rainy days is January (5.4 days).
Average snowfall in September
Fairfield, PA
- Average snowfall in September: 0"
The month with the highest snowfall is January (1.06").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Fairfield, PA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (6.7 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
Fairfield, PA
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in September: 8h and 4min
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
Fairfield, PA
- Average sunshine days in September: 17.5 days
The month with the most sunshine days is November (21.7 days).
The month with the least sunshine days is May (12.9 days).
Average UV index in September
Fairfield, PA
- Average UV index in September: 4
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Fairfield, PA
- Average cloud cover in September: 38
The months with the most cloud cover are January and February (Cloud cover 50).
The month with the least cloud cover is July (Cloud cover 32).
Average visibility in September
Fairfield, PA
- Average visibility in September: 5mi
The months with the highest visibility are March, April, June, July, November and December (6mi).
The months with the lowest visibility are January, February, May, August, September and October (5mi).
Fairfield, Pennsylvania, USA
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