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
In Monaca, the beginning of September is marked by a marginally lowered average high-temperature, shifting from August's warm 81.1°F (27.3°C) to a still moderately hot 74.7°F (23.7°C). Monaca, during the month of September, experiences an average low-temperature of 54.7°F (12.6°C).Humidity
In September, the average relative humidity is 79%.Rainfall
In Monaca, during September, the rain falls for 13.3 days and regularly aggregates up to 1.77" (45mm) of precipitation. In Monaca, during the entire year, the rain falls for 168.7 days and collects up to 21.22" (539mm) of precipitation.Snowfall
May through September are months without snowfall.Daylight
In Monaca, the average length of the day in September is 12h and 27min.On the first day of September in Monaca, sunrise is at 6:48 am and sunset at 7:52 pm. On the last day of the month, sunrise is at 7:17 am and sunset at 7:04 pm EDT.
Sunshine
The average sunshine in September is 8.4h.UV index
In September, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV rays for the average person.Note: In September, the maximum UV index of 4 translates into these guidelines:
Exercise prevention - Protecting skin and eyes from harm is required. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Employ a wide-brim hat for potent defense against up to 50% of UV rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September?
What is the average humidity in September?
How much does it rain in September?
When it does not snow?
Does it snow in September?
How many hours of daylight does Monaca have in September?
When is the sunrise / sunset in September?
How long on average sun shines in September?
What is the UV index intensity in September?
Average temperature in September
Monaca, PA
- Average high temperature in September: 74.7°F
The warmest month (with the highest average high temperature) is July (82.8°F).
The month with the lowest average high temperature is January (32.5°F).
- Average low temperature in September: 54.7°F
The month with the highest average low temperature is July (61.3°F).
The coldest month (with the lowest average low temperature) is January (19.8°F).
Average pressure in September
Monaca, PA
- Average pressure in September: 30.05"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
Monaca, PA
- Average wind speed in September: 5.3mph
The windiest month (with the highest average wind speed) is January (8.1mph).
The calmest months (with the lowest average wind speed) are July and August (4.8mph).
Average humidity in September
Monaca, PA
- Average humidity in September: 79%
The month with the highest relative humidity is February (86%).
The months with the lowest relative humidity are April, July and August (77%).
Average rainfall in September
Monaca, PA
- Average rainfall in September: 1.77"
The wettest month (with the highest rainfall) is June (2.32").
The driest month (with the least rainfall) is November (1.1").
Average rainfall days in September
Monaca, PA
- Average rainfall days in September: 13.3 days
The month with the highest number of rainy days is May (18.1 days).
The month with the least rainy days is January (10 days).
Average snowfall in September
Monaca, PA
- Average snowfall in September: 0"
The month with the highest snowfall is January (3.11").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Monaca, PA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (17.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Monaca, 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 2min
The month with the most sunshine is August (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 2h and 54min).
Average sunshine days in September
Monaca, PA
- Average sunshine days in September: 14.1 days
The month with the most sunshine days is November (15.1 days).
The month with the least sunshine days is February (8.3 days).
Average UV index in September
Monaca, PA
- Average UV index in September: 4
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in September
Monaca, PA
- Average cloud cover in September: 39
The month with the most cloud cover is January (Cloud cover 70).
The month with the least cloud cover is August (Cloud cover 34).
Average visibility in September
Monaca, PA
- Average visibility in September: 5mi
The month with the highest visibility is April (6mi).
The months with the lowest visibility are January and February (4mi).
Monaca, Pennsylvania, USA
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