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
Walnut Creek's September weather shows a modest shift in high-temperatures, falling from August's hot 86.9°F (30.5°C) to a warm 81.5°F (27.5°C). Throughout September, Walnut Creek experiences a low-temperature average of 65.3°F (18.5°C).Heat index
The heat index in September is calculated to be a tropical 87.8°F (31°C). Continuing activity during long-lasting exposure might induce tiredness and result in heat cramps.One should be cognizant that the heat index values are tailored for shaded spots and mild winds. The heat index may experience an enhancement of 15 Fahrenheit (8 Celsius) degrees under direct sunlight.
Note: The heat index, also known as 'apparent temperature' or 'feels like', melds the effects of warmth and moisture to generate a feeling of heat. A person's impression of weather can be affected by numerous aspects, among them metabolic variations, pregnancy, and activity levels. Being under direct sunshine can magnify the heat experience, possibly pushing up the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are essentially critical for children. Young individuals are generally in more danger than adults due to their lower capacity to sweat. Moreover, their large skin surface in relation to their small bodies and the increased heat generation from their activities makes them more vulnerable.
Humidity
August and September, with an average relative humidity of 79%, are the most humid months.Rainfall
In Walnut Creek, North Carolina, during September, the rain falls for 9 days and regularly aggregates up to 0.79" (20mm) of precipitation. Throughout the year, there are 110.7 rainfall days, and 9.02" (229mm) of precipitation is accumulated.Snowfall
March through December are months without snowfall.Daylight
In September, the average length of the day in Walnut Creek is 12h and 23min.On the first day of September in Walnut Creek, sunrise is at 6:44 am and sunset at 7:38 pm. On the last day of the month, sunrise is at 7:06 am and sunset at 6:56 pm EDT.
Sunshine
In Walnut Creek, the average sunshine in September is 9.1h.UV index
The average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for ordinary individuals.Note: The maximum UV index of 5 during September leads to these instructions:
Be cautious. Those with fair skin can be subjected to burns in fewer than 30 minutes. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit.
Frequently asked questions
What are September temperatures in Walnut Creek?
What is the most humid month in Walnut Creek?
What is the average humidity in September in Walnut Creek?
How much does it rain in Walnut Creek in September?
When it does not snow in Walnut Creek?
What is the average length of the day in September in Walnut Creek?
When is the sunrise / sunset in September in Walnut Creek?
How long on average sun shines in September in Walnut Creek?
How high is the UV index in September in Walnut Creek?
Average temperature in September
Walnut Creek, NC
- Average high temperature in September: 81.5°F
The warmest month (with the highest average high temperature) is July (88.3°F).
The month with the lowest average high temperature is January (49.6°F).
- Average low temperature in September: 65.3°F
The month with the highest average low temperature is July (71.6°F).
The coldest month (with the lowest average low temperature) is January (34.5°F).
Average pressure in September
Walnut Creek, NC
- Average pressure in September: 30.02"Hg
The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.96"Hg).
Average wind speed in September
Walnut Creek, NC
- Average wind speed in September: 6.6mph
The windiest month (with the highest average wind speed) is April (8.6mph).
The calmest month (with the lowest average wind speed) is August (5.6mph).
Average humidity in September
Walnut Creek, NC
- Average humidity in September: 79%
The months with the highest relative humidity are August and September (79%).
The month with the lowest relative humidity is January (73%).
Average rainfall in September
Walnut Creek, NC
- Average rainfall in September: 0.79"
The wettest month (with the highest rainfall) is August (1.42").
The driest month (with the least rainfall) is January (0.39").
Average rainfall days in September
Walnut Creek, NC
- Average rainfall days in September: 9 days
The month with the highest number of rainy days is August (15 days).
The month with the least rainy days is November (5.8 days).
Average snowfall in September
Walnut Creek, NC
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.08").
The months with the least snowfall are March, April, May, June, July, August, September, October, November and December (0").
Average snowfall days in September
Walnut Creek, NC
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (0.7 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
Walnut Creek, NC
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 48min).
- Average sunshine in September: 9h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is December (Average sunshine: 5h and 30min).
Average sunshine days in September
Walnut Creek, NC
- Average sunshine days in September: 18 days
The month with the most sunshine days is October (23.5 days).
The month with the least sunshine days is June (11.3 days).
Average UV index in September
Walnut Creek, NC
- Average UV index in September: 5
The months with the highest UV index are June and July (UV index 7).
The month with the lowest UV index is January (UV index 2).
Average cloud cover in September
Walnut Creek, NC
- Average cloud cover in September: 36
The months with the most cloud cover are February and March (Cloud cover 41).
The months with the least cloud cover are June, July and October (Cloud cover 32).
Average visibility in September
Walnut Creek, NC
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, September, October, November and December (6mi).
The month with the lowest visibility is August (5mi).
Walnut Creek, North Carolina, USA
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