September weather forecastHerkimer, NY
September
Weather in September
September, the first month of the autumn in Herkimer, is also an agreeable month, with an average temperature varying between 49.6°F (9.8°C) and 69.4°F (20.8°C).Temperature
September's arrival aligns with a minor decrease in average high-temperatures, from August's moderately hot 76.5°F (24.7°C) to an agreeable 69.4°F (20.8°C). Herkimer experiences a nighttime temperature average of 49.6°F (9.8°C) during September.Humidity
In September, the average relative humidity is 80%.Rainfall
September is the month with the least rainfall. Rain falls for 12.6 days and accumulates 1.97" (50mm) of precipitation.Snowfall
In Herkimer, snow does not fall in June through September.Daylight
The average length of the day in September is 12h and 29min.On the first day of the month, sunrise is at 6:25 am and sunset at 7:34 pm. On the last day of September, sunrise is at 6:56 am and sunset at 6:42 pm EDT.
Sunshine
The average sunshine in September is 8.8h.UV index
The average daily maximum UV index in September is 3. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for the ordinary person.Note: The maximum daily UV index of 3 in September converts into the following recommendations:
Ensure safety - Sun damage prevention is strongly urged. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Herkimer, NY
- Average high temperature in September: 69.4°F
The warmest month (with the highest average high temperature) is July (78.3°F).
The month with the lowest average high temperature is January (26.6°F).
- Average low temperature in September: 49.6°F
The month with the highest average low temperature is July (56.8°F).
The coldest month (with the lowest average low temperature) is January (14.9°F).
Average pressure in September
Herkimer, 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).
Average wind speed in September
Herkimer, NY
- Average wind speed in September: 6.3mph
The windiest months (with the highest average wind speed) are January and February (9.7mph).
The calmest month (with the lowest average wind speed) is August (6mph).
Average humidity in September
Herkimer, NY
- Average humidity in September: 80%
The month with the highest relative humidity is February (88%).
The months with the lowest relative humidity are April and May (78%).
Average rainfall in September
Herkimer, NY
- Average rainfall in September: 1.97"
The wettest month (with the highest rainfall) is May (3.23").
The driest month (with the least rainfall) is September (1.97").
Average rainfall days in September
Herkimer, NY
- Average rainfall days in September: 12.6 days
The months with the highest number of rainy days are April and May (16.3 days).
The month with the least rainy days is January (8.3 days).
Average snowfall in September
Herkimer, NY
- Average snowfall in September: 0"
The months with the highest snowfall are January and February (8.27").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Herkimer, NY
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (19.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Herkimer, NY
- Average daylight in September: 12h and 30min
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: 8h and 48min
The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is February (Average sunshine: 2h and 30min).
Average sunshine days in September
Herkimer, NY
- Average sunshine days in September: 15.6 days
The month with the most sunshine days is September (15.6 days).
The month with the least sunshine days is February (4.9 days).
Average UV index in September
Herkimer, NY
- Average UV index in September: 3
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in September
Herkimer, NY
- Average cloud cover in September: 37
The months with the most cloud cover are January and February (Cloud cover 73).
The months with the least cloud cover are July and August (Cloud cover 36).
Average visibility in September
Herkimer, NY
- Average visibility in September: 5mi
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (5mi).
The months with the lowest visibility are January and February (4mi).
