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
The advent of September brings a slight shift in average high-temperature, moving from a tropical 86.5°F (30.3°C) in August to a warm 80.6°F (27°C). Williamsburg's nights in September cool down to an average low-temperature of 62.1°F (16.7°C).Heat index
September's heat index is evaluated at 80.6°F (27°C). With sustained exposure and activity, exhaustion becomes probable, resulting in heat cramps.It is noted that heat index values are ascertained for locations in the shade and with gentle breezes. With direct sunlight, the heat index could increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is a calculation that merges air temperature and relative humidity to depict the sensation of warmth. The impression of weather on a person can be swayed by additional aspects, including metabolic variations, pregnancy, and activity levels. The sun, when shining directly, can have a significant impact on the perceived temperature, increasing the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. Younglings frequently fail to recognize the requirement to rest and rehydrate. Thirst emerges late in dehydration - it is imperative to keep hydration levels high, particularly during extended physical exertions.
Humidity
In September, the average relative humidity is 44%.Rainfall
In Williamsburg, in September, it is raining for 11.8 days, with typically 1.3" (33mm) of accumulated precipitation. In Williamsburg, during the entire year, the rain falls for 82.9 days and collects up to 8.54" (217mm) of precipitation.Snowfall
April through October are months without snowfall.Daylight
In Williamsburg, the average length of the day in September is 12h and 22min.On the first day of September, sunrise is at 6:44 am and sunset at 7:33 pm. On the last day of the month, sunrise is at 7:03 am and sunset at 6:54 pm MDT.
Sunshine
In Williamsburg, the average sunshine in September is 11.1h.UV index
In September, the average daily maximum UV index in Williamsburg is 6. A UV Index of 6 to 7 symbolizes a high threat to health from unsafe exposure to UV radiation for average individuals.Note: In September, the maximum UV index of 6 translates into these guidelines:
Evade overexposure. Individuals with fair skin risk burning in under 20 minutes. Stay out of direct sunlight between 10 a.m. and 4 p.m., when UV radiation is most intense, and remember that not all shade structures provide complete protection. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature in Williamsburg?
What is the average humidity in September in Williamsburg?
How many days does it rain in September in Williamsburg?
When it does not snow in Williamsburg?
How many hours of daylight does Williamsburg have in September?
What time are sunrise and sunset in September in Williamsburg?
How many hours of sunshine does Williamsburg have in September?
What is the UV index reading in September in Williamsburg?
Average temperature in September
Williamsburg, NM
- Average high temperature in September: 80.6°F
The warmest month (with the highest average high temperature) is June (90°F).
The month with the lowest average high temperature is December (51.1°F).
- Average low temperature in September: 62.1°F
The month with the highest average low temperature is July (70°F).
The coldest month (with the lowest average low temperature) is January (32.9°F).
Average pressure in September
Williamsburg, NM
- Average pressure in September: 29.96"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).
Average wind speed in September
Williamsburg, NM
- Average wind speed in September: 6mph
The windiest month (with the highest average wind speed) is April (10mph).
The calmest month (with the lowest average wind speed) is August (5.5mph).
Average humidity in September
Williamsburg, NM
- Average humidity in September: 44%
The month with the highest relative humidity is December (50%).
The months with the lowest relative humidity are April and May (23%).
Average rainfall in September
Williamsburg, NM
- Average rainfall in September: 1.3"
The wettest month (with the highest rainfall) is July (2.13").
The driest month (with the least rainfall) is April (0.12").
Average rainfall days in September
Williamsburg, NM
- Average rainfall days in September: 11.8 days
The month with the highest number of rainy days is July (16.9 days).
The month with the least rainy days is November (2.7 days).
Average snowfall in September
Williamsburg, NM
- Average snowfall in September: 0"
The month with the highest snowfall is November (1.46").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Williamsburg, NM
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is December (1.4 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Williamsburg, NM
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- Average sunshine in September: 11h and 1min
The month with the most sunshine is June (Average sunshine: 12h and 0min).
The months with the least sunshine are January and December (Average sunshine: 7h and 12min).
Average sunshine days in September
Williamsburg, NM
- Average sunshine days in September: 14.6 days
The month with the most sunshine days is November (26.5 days).
The month with the least sunshine days is July (7.7 days).
Average UV index in September
Williamsburg, NM
- Average UV index in September: 6
The months with the highest UV index are June and July (UV index 7).
The month with the lowest UV index is December (UV index 2).
Average cloud cover in September
Williamsburg, NM
- Average cloud cover in September: 14
The month with the most cloud cover is July (Cloud cover 19).
The month with the least cloud cover is May (Cloud cover 9).
Average visibility in September
Williamsburg, NM
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Williamsburg, New Mexico, USA
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