September weather forecast
Hallowell, PA

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Weather in September

September, the first month of the autumn in Hallowell, is still a warm month, with temperature in the range of an average low of 59.2°F (15.1°C) and an average high of 76.1°F (24.5°C).

Temperature

Hallowell's progression into September involves a minor drop in the average high-temperature, slightly receding from 83.3°F (28.5°C) in August to a still warm 76.1°F (24.5°C). Throughout September, Hallowell witnesses a consistent average low-temperature of 59.2°F (15.1°C).

Humidity

The average relative humidity in September in Hallowell is 76%.

Rainfall

The month with the least rainfall is September, when the rain falls for 6.7 days and typically collects 0.2" (5mm) of precipitation.

Snowfall

In Hallowell, snow does not fall in June through October.

Daylight

The average length of the day in September in Hallowell is 12h and 27min.
On the first day of September in Hallowell, Pennsylvania, sunrise is at 6:28 am and sunset at 7:31 pm. On the last day of the month, sunrise is at 6:56 am and sunset at 6:43 pm EDT.

Sunshine

In Hallowell, the average sunshine in September is 8.9h.

UV index

In September, the average daily maximum UV index in Hallowell is 4. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for average individuals.
Note: The daily high UV index of 4 during September translates into the following recommendations:
Prioritize safety - Recommendations to avert sunburn are shared. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes.

Frequently asked questions

What are the temperatures in September?

During September, Hallowell experiences an average high-temperature of 76.1°F (24.5°C) and a low-temperature of 59.2°F (15.1°C). In August, the average heat index (a.k.a. 'felt air temperature', 'real feel'), which calculates the temperature value influenced by the moisture in the air, is estimated at 89.6°F (32°C).

What is the average humidity in September?

In September, the average relative humidity is 76%.

What is the driest month?

The month with the least rainfall is September, when the rain falls for 6.7 days and typically collects 0.2" (5mm) of precipitation.

How many days does it rain in September?

In Hallowell, in September, it is raining for 6.7 days, with typically 0.2" (5mm) of accumulated precipitation.

When it does not snow?

In Hallowell, snow does not fall in June through October.

What is the average length of the day in September?

In Hallowell, the average day length in September is 12h and 27min.

When is the sunrise / sunset in September?

In September, on the first day of the month, sunrise is at 6:28 am and sunset at 7:31 pm. On the last day of the month, sunrise is at 6:56 am and sunset at 6:43 pm EDT.

How many hours of sunshine does Hallowell have in September?

In September, the average sunshine duration is 8.9h.

What is the UV index intensity in September?

In Hallowell, the average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a moderate vulnerability from exposure to Sun's UV rays.
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
Hallowell, PA

Average temperature in September - Hallowell, PA
  • Average high temperature in September: 76.1°F

The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is January (36.9°F).

  • Average low temperature in September: 59.2°F

The month with the highest average low temperature is July (67.5°F).
The coldest month (with the lowest average low temperature) is January (24.3°F).

Average pressure in September
Hallowell, PA

Average pressure in September - Hallowell, 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
Hallowell, PA

Average wind speed in September - Hallowell, PA
  • Average wind speed in September: 5.8mph

The windiest month (with the highest average wind speed) is March (8.4mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).

Average humidity in September
Hallowell, PA

Average humidity in September - Hallowell, PA
  • Average humidity in September: 76%

The months with the highest relative humidity are February, October and December (78%).
The months with the lowest relative humidity are April, July and August (72%).

Average rainfall in September
Hallowell, PA

Average rainfall in September - Hallowell, PA
  • Average rainfall in September: 0.2"

The wettest month (with the highest rainfall) is December (0.75").
The driest month (with the least rainfall) is September (0.2").

Average rainfall days in September
Hallowell, PA

Average rainfall days in September - Hallowell, PA
  • Average rainfall days in September: 6.7 days

The month with the highest number of rainy days is July (10.3 days).
The month with the least rainy days is January (4.3 days).

Average snowfall in September
Hallowell, PA

Average snowfall in September - Hallowell, PA
  • Average snowfall in September: 0"

The month with the highest snowfall is February (0.43").
The months with the least snowfall are June, July, August, September and October (0").

Average snowfall days in September
Hallowell, PA

Average snowfall days in September - Hallowell, PA
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (3.7 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in September /
Average sunshine in September
Hallowell, PA

Average daylight in September / Average sunshine in September - Hallowell, 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 42min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).

Average sunshine days in September
Hallowell, PA

Average sunshine days in September - Hallowell, PA
  • Average sunshine days in September: 21.2 days

The month with the most sunshine days is January (24.3 days).
The month with the least sunshine days is July (17.4 days).

Average UV index in September
Hallowell, PA

Average UV index in September - Hallowell, 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
Hallowell, PA

Average cloud cover in September - Hallowell, PA
  • Average cloud cover in September: 38

The month with the most cloud cover is February (Cloud cover 48).
The month with the least cloud cover is July (Cloud cover 31).

Average visibility in September
Hallowell, PA

Average visibility in September - Hallowell, 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).

Hallowell, Pennsylvania, USA

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