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 arrival of September corresponds with a light shift in temperature, down from 82.2°F (27.9°C) in August to a still moderately hot 75.7°F (24.3°C). Mount Washington experiences an average nighttime temperature of 55.9°F (13.3°C) in the month of September.Humidity
In Mount Washington, the average relative humidity in September is 76%.Rainfall
In Mount Washington, during September, the rain falls for 12.9 days and regularly aggregates up to 2.13" (54mm) of precipitation. Throughout the year, in Mount Washington, there are 163.6 rainfall days, and 26.93" (684mm) of precipitation is accumulated.Snowfall
May through September are months without snowfall in Mount Washington.Daylight
The average length of the day in September in Mount Washington is 12h and 27min.On the first day of September, sunrise is at 6:48 am and sunset at 7:51 pm. On the last day of the month, sunrise is at 7:16 am and sunset at 7:03 pm EDT.
Sunshine
In Mount Washington, the average sunshine in September is 8.2h.UV index
The average daily maximum UV index in September in Mount Washington is 4. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for the ordinary person.Note: In September, the maximum UV index of 4 translates into these guidelines:
Put precautions into practice - Protective measures against sun-induced damage are advised. The midday Sun can be harmful due to its potent UV radiation; seek shade and reduce exposure. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades.
Frequently asked questions
What are September temperatures in Mount Washington?
What is the average humidity in September in Mount Washington?
How many days does it rain in September in Mount Washington?
When it does not snow in Mount Washington?
Does it snow in Mount Washington in September?
What is the average length of the day in September in Mount Washington?
When are sunrise and sunset in September in Mount Washington?
How many hours of sunshine does Mount Washington have in September?
What is the UV index reading in September in Mount Washington?
Average temperature in September
Mount Washington, PA
- Average high temperature in September: 75.7°F
The warmest month (with the highest average high temperature) is July (84°F).
The month with the lowest average high temperature is January (33.1°F).
- Average low temperature in September: 55.9°F
The month with the highest average low temperature is July (63°F).
The coldest month (with the lowest average low temperature) is January (21°F).
Average pressure in September
Mount Washington, 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 (29.95"Hg).
Average wind speed in September
Mount Washington, PA
- Average wind speed in September: 5.2mph
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 (4.8mph).
Average humidity in September
Mount Washington, PA
- Average humidity in September: 76%
The months with the highest relative humidity are January and February (84%).
The months with the lowest relative humidity are July and August (73%).
Average rainfall in September
Mount Washington, PA
- Average rainfall in September: 2.13"
The wettest month (with the highest rainfall) is May (3.07").
The driest month (with the least rainfall) is November (1.54").
Average rainfall days in September
Mount Washington, PA
- Average rainfall days in September: 12.9 days
The month with the highest number of rainy days is May (18.9 days).
The month with the least rainy days is January (8.9 days).
Average snowfall in September
Mount Washington, PA
- Average snowfall in September: 0"
The month with the highest snowfall is January (3.31").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Mount Washington, PA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (14.4 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Mount Washington, 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 18min).
- Average sunshine in September: 8h and 1min
The month with the most sunshine is August (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 2h and 48min).
Average sunshine days in September
Mount Washington, PA
- Average sunshine days in September: 13.8 days
The month with the most sunshine days is November (16.5 days).
The month with the least sunshine days is February (9.6 days).
Average UV index in September
Mount Washington, PA
- Average UV index in September: 4
The months with the highest UV index are May, June and July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in September
Mount Washington, PA
- Average cloud cover in September: 40
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
Mount Washington, PA
- Average visibility in September: 5mi
The months with the highest visibility are April, June, July, August and November (6mi).
The months with the lowest visibility are January, February, March, May, September, October and December (5mi).
Mount Washington, Pennsylvania, USA
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