September weather forecast
Lock Haven, PA

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Weather in September

September, the first month of the autumn in Lock Haven, is still a pleasant month, with an average temperature varying between 51.1°F (10.6°C) and 72.3°F (22.4°C).

Temperature

The shift from August to September coincides with a small decrease in the average high-temperature, down to an agreeable 72.3°F (22.4°C) from a moderately hot 79.5°F (26.4°C). Lock Haven's temperature tends to fall to an average low of 51.1°F (10.6°C) during the nights of September.

Humidity

The average relative humidity in September in Lock Haven is 80%.

Rainfall

In September, in Lock Haven, the rain falls for 13 days. Throughout September, 2.4" (61mm) of precipitation is accumulated. Throughout the year, in Lock Haven, there are 174.7 rainfall days, and 32.09" (815mm) of precipitation is accumulated.

Snowfall

In Lock Haven, snow does not fall in June through September.

Daylight

The average length of the day in September in Lock Haven, Pennsylvania, is 12h and 28min.
On the first day of September, sunrise is at 6:37 am and sunset at 7:42 pm. On the last day of the month, sunrise is at 7:06 am and sunset at 6:52 pm EDT.

Sunshine

In September, the average sunshine is 8.4h.

UV index

In September, the average daily maximum UV index is 3. A UV Index reading of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for the average person.
Note: The UV index of 3 during September translates into the following guidance:
Take necessary precautions - Suggestions to elude sunburn are provided. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure.
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Frequently asked questions

What is the temperature in September in Lock Haven?

The high-temperature, in September, in Lock Haven, records 72.3°F (22.4°C), while the low-temperature is 51.1°F (10.6°C). The average heat index (a.k.a. 'felt air temperature', 'feels like'), which combines air temperature and relative humidity, in July is computed to be 87.8°F (31°C).

What is the average humidity in September in Lock Haven?

The average relative humidity in September in Lock Haven, Pennsylvania, is 80%.

How many days does it rain in September in Lock Haven?

In September, in Lock Haven, Pennsylvania, the rain falls for 13 days. Throughout September, 2.4" (61mm) of precipitation is accumulated.

When it does not snow in Lock Haven?

June through September are months without snowfall in Lock Haven.

Does it snow in Lock Haven in September?

In Lock Haven, Pennsylvania, in September, it doesn't snow. In October, it regularly snows.

What is the average length of the day in September in Lock Haven?

In September, the average day length in Lock Haven, Pennsylvania, is 12h and 28min.

When are sunrise and sunset in September in Lock Haven?

On the first day of September, sunrise is at 6:37 am and sunset at 7:42 pm. On the last day of the month, sunrise is at 7:06 am and sunset at 6:52 pm EDT.

How long on average sun shines in September in Lock Haven?

In Lock Haven, the average sunshine duration in September is 8.4h.

How high is the UV index in September in Lock Haven?

In Lock Haven, the average daily maximum UV index in September is 3. A UV Index reading of 3 to 5 represents a medium health risk from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Lock Haven, PA

Average temperature in September - Lock Haven, PA
  • Average high temperature in September: 72.3°F

The warmest month (with the highest average high temperature) is July (82.2°F).
The month with the lowest average high temperature is January (30.9°F).

  • Average low temperature in September: 51.1°F

The month with the highest average low temperature is July (58.6°F).
The coldest month (with the lowest average low temperature) is January (18.3°F).

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Average pressure in September
Lock Haven, PA

Average pressure in September - Lock Haven, PA
  • Average pressure in September: 30.07"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).

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Average wind speed in September
Lock Haven, PA

Average wind speed in September - Lock Haven, PA
  • Average wind speed in September: 5.2mph

The windiest months (with the highest average wind speed) are January and April (7.5mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).

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Average humidity in September
Lock Haven, PA

Average humidity in September - Lock Haven, PA
  • Average humidity in September: 80%

The months with the highest relative humidity are February and December (84%).
The months with the lowest relative humidity are April, June and July (77%).

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Average rainfall in September
Lock Haven, PA

Average rainfall in September - Lock Haven, PA
  • Average rainfall in September: 2.4"

The wettest month (with the highest rainfall) is April (3.54").
The driest month (with the least rainfall) is November (2.09").

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Average rainfall days in September
Lock Haven, PA

Average rainfall days in September - Lock Haven, PA
  • Average rainfall days in September: 13 days

The month with the highest number of rainy days is May (18.7 days).
The month with the least rainy days is February (10.3 days).

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Average snowfall in September
Lock Haven, PA

Average snowfall in September - Lock Haven, PA
  • Average snowfall in September: 0"

The month with the highest snowfall is February (7.13").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in September
Lock Haven, PA

Average snowfall days in September - Lock Haven, PA
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (15.4 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in September /
Average sunshine in September
Lock Haven, PA

Average daylight in September / Average sunshine in September - Lock Haven, PA
  • Average daylight in September: 12h and 3min

The month with the longest days is June (Average daylight: 15h and 6min).
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 July (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 18min).

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Average sunshine days in September
Lock Haven, PA

Average sunshine days in September - Lock Haven, PA
  • Average sunshine days in September: 15.5 days

The month with the most sunshine days is September (15.5 days).
The month with the least sunshine days is February (8.8 days).

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Average UV index in September
Lock Haven, PA

Average UV index in September - Lock Haven, PA
  • Average UV index in September: 3

The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is December (UV index 1).

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Average cloud cover in September
Lock Haven, PA

Average cloud cover in September - Lock Haven, PA
  • Average cloud cover in September: 43

The months with the most cloud cover are January and December (Cloud cover 64).
The month with the least cloud cover is July (Cloud cover 37).

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Average visibility in September
Lock Haven, PA

Average visibility in September - Lock Haven, PA
  • Average visibility in September: 4mi

The months with the highest visibility are January, March, April, May, June, July, August, October and November (5mi).
The months with the lowest visibility are February, September and December (4mi).

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Lock Haven, Pennsylvania, USA

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