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
A subtle shift in Washington's weather is observed as August turns into September, with the average high temperature reducing from a moderately hot 76.5°F (24.7°C) to an agreeable 68.9°F (20.5°C). Washington observes an average nighttime low-temperature of 49.6°F (9.8°C) during the month of September.Humidity
In Washington, the average relative humidity in September is 80%.Rainfall
In September, in Washington, New Hampshire, the rain falls for 10.1 days. Throughout September, 1.02" (26mm) of precipitation is accumulated. Throughout the year, there are 121.9 rainfall days, and 13.58" (345mm) of precipitation is accumulated.Snowfall
June through September are months without snowfall.Daylight
In Washington, the average length of the day in September is 12h and 29min.On the first day of September in Washington, New Hampshire, sunrise is at 6:13 am and sunset at 7:22 pm. On the last day of the month, sunrise is at 6:45 am and sunset at 6:30 pm EDT.
Sunshine
The average sunshine in September is 8.2h.UV index
In September, the average daily maximum UV index in Washington, New Hampshire, is 3. A UV Index reading of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for the average person.Note: The maximum daily UV index of 3 in September interprets into the following recommendations:
Undertake precautions - Obligation exists to protect against skin and eye damage. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection.
Frequently asked questions
What is the temperature in September in Washington?
What is the average humidity in September in Washington?
How many days does it rain in September in Washington?
When it does not snow in Washington?
Does it snow in Washington in September?
How many hours of daylight does Washington have in September?
When are sunrise and sunset in September in Washington?
How long on average sun shines in September in Washington?
What is the UV index reading in September in Washington?
Average temperature in September
Washington, NH
- Average high temperature in September: 68.9°F
The warmest month (with the highest average high temperature) is July (78.4°F).
The month with the lowest average high temperature is January (25.5°F).
- Average low temperature in September: 49.6°F
The month with the highest average low temperature is July (58.1°F).
The coldest month (with the lowest average low temperature) is January (13.1°F).
Average pressure in September
Washington, NH
- Average pressure in September: 30.05"Hg
The month with the highest atmospheric pressure is November (30.07"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Washington, NH
- Average wind speed in September: 5.2mph
The windiest months (with the highest average wind speed) are January and February (7.8mph).
The calmest month (with the lowest average wind speed) is August (5mph).
Average humidity in September
Washington, NH
- Average humidity in September: 80%
The months with the highest relative humidity are January and February (86%).
The month with the lowest relative humidity is April (75%).
Average rainfall in September
Washington, NH
- Average rainfall in September: 1.02"
The wettest month (with the highest rainfall) is October (1.61").
The driest month (with the least rainfall) is January (0.79").
Average rainfall days in September
Washington, NH
- Average rainfall days in September: 10.1 days
The month with the highest number of rainy days is May (14.4 days).
The month with the least rainy days is February (5.8 days).
Average snowfall in September
Washington, NH
- Average snowfall in September: 0"
The month with the highest snowfall is February (3.82").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Washington, NH
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (13.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Washington, NH
- 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: 8h and 1min
The month with the most sunshine is August (Average sunshine: 10h and 0min).
The month with the least sunshine is February (Average sunshine: 3h and 48min).
Average sunshine days in September
Washington, NH
- Average sunshine days in September: 17.1 days
The month with the most sunshine days is January (17.6 days).
The month with the least sunshine days is April (12.9 days).
Average UV index in September
Washington, NH
- Average UV index in September: 3
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are February and December (UV index 1).
Average cloud cover in September
Washington, NH
- Average cloud cover in September: 41
The month with the most cloud cover is February (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 37).
Average visibility in September
Washington, NH
- Average visibility in September: 4mi
The months with the highest visibility are January, March, April, May, June, July, August, October, November and December (5mi).
The months with the lowest visibility are February and September (4mi).
Washington, New Hampshire, USA
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