September weather forecast
Guilderland, NY

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Weather in September

September, the first month of the autumn in Guilderland, is also an agreeable month, with temperature in the range of an average low of 51.3°F (10.7°C) and an average high of 71.4°F (21.9°C).

Temperature

Transitioning from August to September involves a subtle drop in average high-temperatures, descending from a warm 79.2°F (26.2°C) to a pleasant 71.4°F (21.9°C). In Guilderland, an average temperature of 51.3°F (10.7°C) is noted during September nights.

Humidity

The average relative humidity in September in Guilderland, New York, is 78%.

Rainfall

September is the month with the least rainfall. Rain falls for 11.4 days and accumulates 2.05" (52mm) of precipitation.

Snowfall

June through September are months without snowfall.

Daylight

The average length of the day in September in Guilderland is 12h and 29min.
On the first day of the month, sunrise is at 6:21 am and sunset at 7:29 pm. On the last day of September, sunrise is at 6:52 am and sunset at 6:38 pm EDT.

Sunshine

In Guilderland, the average sunshine in September is 9h.

UV index

In September, the average daily maximum UV index is 3. A UV Index estimate of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for the ordinary person.
Note: In September, a daily UV index of 3 turns into the following recommendations:
Be vigilant - Preventing sunburn is recommended. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays.
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Frequently asked questions

What is the usual temperature for Guilderland in September?

The average high-temperature and low-temperature in Guilderland during September are 71.4°F (21.9°C) and 51.3°F (10.7°C) respectively. In July, the average heat index (a.k.a. 'feels like', 'apparent temperature'), which takes the relative humidity and factors it into the air temperature reading, is computed to be 86°F (30°C).

What is the average humidity in September in Guilderland?

The average relative humidity in September in Guilderland is 78%.

What is the driest month in Guilderland?

September is the month with the least rainfall in Guilderland, New York. Rain falls for 11.4 days and accumulates 2.05" (52mm) of precipitation.

How many days does it rain in September in Guilderland?

In Guilderland, during September, the rain falls for 11.4 days and regularly aggregates up to 2.05" (52mm) of precipitation.

When it does not snow in Guilderland?

June through September are months without snowfall in Guilderland.

Does it snow in Guilderland in September?

In Guilderland, New York, in September, it doesn't snow. In October, it regularly snows.

How many hours of daylight does Guilderland have in September?

In Guilderland, the average day length in September is 12h and 29min.

When is the sunrise / sunset in September in Guilderland?

On the first day of September in Guilderland, sunrise is at 6:21 am and sunset at 7:29 pm. On the last day of the month, sunrise is at 6:52 am and sunset at 6:38 pm EDT.

How many hours of sunshine does Guilderland have in September?

In September, the average sunshine duration in Guilderland, New York, is 9h.

What is the UV index reading in September in Guilderland?

In Guilderland, the average daily maximum UV index in September is 3. A UV Index estimate of 3 to 5 represents a medium hazard to health 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
Guilderland, NY

Average temperature in September - Guilderland, NY
  • Average high temperature in September: 71.4°F

The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (28.8°F).

  • Average low temperature in September: 51.3°F

The month with the highest average low temperature is July (59.5°F).
The coldest month (with the lowest average low temperature) is January (16.7°F).

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Average pressure in September
Guilderland, NY

Average pressure in September - Guilderland, NY
  • Average pressure in September: 30.06"Hg

The month with the highest atmospheric pressure is November (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

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Average wind speed in September
Guilderland, NY

Average wind speed in September - Guilderland, NY
  • Average wind speed in September: 5.5mph

The windiest months (with the highest average wind speed) are January and February (8.1mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).

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Average humidity in September
Guilderland, NY

Average humidity in September - Guilderland, NY
  • Average humidity in September: 78%

The month with the highest relative humidity is February (83%).
The month with the lowest relative humidity is April (74%).

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Average rainfall in September
Guilderland, NY

Average rainfall in September - Guilderland, NY
  • Average rainfall in September: 2.05"

The wettest month (with the highest rainfall) is October (3.19").
The driest month (with the least rainfall) is September (2.05").

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Average rainfall days in September
Guilderland, NY

Average rainfall days in September - Guilderland, NY
  • Average rainfall days in September: 11.4 days

The month with the highest number of rainy days is May (17.4 days).
The month with the least rainy days is February (8.3 days).

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Average snowfall in September
Guilderland, NY

Average snowfall in September - Guilderland, NY
  • Average snowfall in September: 0"

The month with the highest snowfall is January (8.15").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in September
Guilderland, NY

Average snowfall days in September - Guilderland, NY
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (13.8 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
Guilderland, NY

Average daylight in September / Average sunshine in September - Guilderland, NY
  • Average daylight in September: 12h and 3min

The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).

  • Average sunshine in September: 9h and 0min

The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 3h and 48min).

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Average sunshine days in September
Guilderland, NY

Average sunshine days in September - Guilderland, NY
  • Average sunshine days in September: 16.7 days

The month with the most sunshine days is September (16.7 days).
The months with the least sunshine days are February and April (11.3 days).

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Average UV index in September
Guilderland, NY

Average UV index in September - Guilderland, NY
  • 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
Guilderland, NY

Average cloud cover in September - Guilderland, NY
  • Average cloud cover in September: 35

The month with the most cloud cover is February (Cloud cover 58).
The months with the least cloud cover are July and August (Cloud cover 33).

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Average visibility in September
Guilderland, NY

Average visibility in September - Guilderland, NY
  • Average visibility in September: 5mi

The months with the highest visibility are April, June, July, October, November and December (6mi).
The months with the lowest visibility are January, February, March, May, August and September (5mi).

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Guilderland, New York, USA

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