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
September marks a gentle change in average high-temperature, declining from August's moderately hot 74.1°F (23.4°C) to a refreshing 66.9°F (19.4°C). Bethlehem experiences a steady low-temperature of 46.8°F (8.2°C) throughout September.Humidity
In September, the average relative humidity is 80%.Rainfall
The month with the least rainfall is September, when the rain falls for 12.5 days and typically collects 2.09" (53mm) of precipitation.Snowfall
June through September are months without snowfall.Daylight
In Bethlehem, the average length of the day in September is 12h and 30min.On the first day of September, sunrise is at 6:10 am and sunset at 7:22 pm. On the last day of the month, sunrise is at 6:44 am and sunset at 6:28 pm EDT.
Sunshine
In September, the average sunshine is 8.4h.UV index
The average daily maximum UV index in September is 3. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.Note: A maximum high UV index of 3 in September translates into the following recommendations:
Be cautious. Those with fair skin can be subjected to burns in fewer than 30 minutes. Avoiding the Sun during its peak radiation time around midday is a healthy practice. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in September?
What is the average humidity in September?
What is the driest month?
How much does it rain in September?
When it does not snow?
Does it snow in September?
How many hours of daylight does Bethlehem have in September?
What time are sunrise and sunset in September?
How many hours of sunshine does Bethlehem have in September?
How high is the UV index in September?
Average temperature in September
Bethlehem, NH
- Average high temperature in September: 66.9°F
The warmest month (with the highest average high temperature) is July (76.3°F).
The month with the lowest average high temperature is January (22.5°F).
- Average low temperature in September: 46.8°F
The month with the highest average low temperature is July (54.1°F).
The coldest month (with the lowest average low temperature) is January (9.3°F).
Average pressure in September
Bethlehem, NH
- Average pressure in September: 30.05"Hg
The month with the highest atmospheric pressure is November (30.06"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Bethlehem, NH
- Average wind speed in September: 4.8mph
The windiest month (with the highest average wind speed) is April (6.5mph).
The calmest month (with the lowest average wind speed) is August (4.5mph).
Average humidity in September
Bethlehem, NH
- Average humidity in September: 80%
The months with the highest relative humidity are January and February (89%).
The month with the lowest relative humidity is May (76%).
Average rainfall in September
Bethlehem, NH
- Average rainfall in September: 2.09"
The wettest month (with the highest rainfall) is October (2.91").
The driest month (with the least rainfall) is September (2.09").
Average rainfall days in September
Bethlehem, NH
- Average rainfall days in September: 12.5 days
The month with the highest number of rainy days is July (18.3 days).
The month with the least rainy days is February (6.7 days).
Average snowfall in September
Bethlehem, NH
- Average snowfall in September: 0"
The month with the highest snowfall is February (13.58").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Bethlehem, NH
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (21.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Bethlehem, NH
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in September: 8h and 2min
The month with the most sunshine is August (Average sunshine: 9h and 54min).
The month with the least sunshine is February (Average sunshine: 3h and 0min).
Average sunshine days in September
Bethlehem, NH
- Average sunshine days in September: 14.5 days
The month with the most sunshine days is September (14.5 days).
The month with the least sunshine days is February (5.9 days).
Average UV index in September
Bethlehem, NH
- Average UV index in September: 3
The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February and December (UV index 1).
Average cloud cover in September
Bethlehem, NH
- Average cloud cover in September: 40
The month with the most cloud cover is February (Cloud cover 71).
The months with the least cloud cover are July and August (Cloud cover 39).
Average visibility in September
Bethlehem, NH
- Average visibility in September: 4mi
The months with the highest visibility are April, May, June, July, August, October and November (5mi).
The months with the lowest visibility are January, February, March, September and December (4mi).
Bethlehem, New Hampshire, USA
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