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 commencement of September includes a gentle temperature shift, with the average high-temperature dropping a bit from a very hot 97.2°F (36.2°C) in August to a tropical 89.2°F (31.8°C). Throughout the month of September, Barstow observes an average nighttime temperature of 70.9°F (21.6°C).Heat index
September's mean heat index is computed to be a tropical 91.4°F (33°C). Use additional protective measures, heat cramps and heat exhaustion are possible outcomes. Continuous activity might lead to heatstroke.Always consider that heat index estimations are for light winds and places in the shade. When exposed to the direct sun, the heat index may augment by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', takes into account both air temperature and humidity to illustrate what people actually feel. One's perception of weather can be shaped by other factors, involving metabolic differences, pregnancy, and physical exertion. Sunshine, when direct, has the potential to intensify weather effects, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for children. Kids are generally in more danger than adults because they perspire less. Their large skin surface area compared to their small bodies and the excessive heat due to their actions raises their risk.
Humidity
In September, the average relative humidity in Barstow is 46%.Rainfall
September is the month with the most rainfall. Rain falls for 9.6 days and accumulates 1.22" (31mm) of precipitation.Snowfall
In Barstow, snow does not fall in April through October.Daylight
The average length of the day in September is 12h and 21min.On the first day of the month, sunrise is at 7:29 am and sunset at 8:16 pm. On the last day of September, sunrise is at 7:47 am and sunset at 7:39 pm CDT.
Sunshine
The average sunshine in September is 9.2h.UV index
In September, the average daily maximum UV index is 6. A UV Index reading of 6 to 7 represents a high threat to health from unsafe exposure to UV radiation for the ordinary person.Note: The UV index of 6 during September translates into the following guidance:
Sidestep overexposure. Individuals with fair complexions risk burning in fewer than 20 minutes. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage.
Frequently asked questions
Is it hot in Barstow during September?
What is the average humidity in September in Barstow?
What is the rainiest month in Barstow?
How much does it rain in Barstow in September?
When it does not snow in Barstow?
What is the average length of the day in September in Barstow?
When are sunrise and sunset in September in Barstow?
How long on average sun shines in September in Barstow?
What is the UV index reading in September in Barstow?
Average temperature in September
Barstow, TX
- Average high temperature in September: 89.2°F
The warmest month (with the highest average high temperature) is June (98.4°F).
The months with the lowest average high temperature are January and December (59.9°F).
- Average low temperature in September: 70.9°F
The month with the highest average low temperature is July (78.4°F).
The coldest month (with the lowest average low temperature) is January (39.9°F).
Average pressure in September
Barstow, TX
- Average pressure in September: 29.95"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.83"Hg).
Average wind speed in September
Barstow, TX
- Average wind speed in September: 9.3mph
The windiest month (with the highest average wind speed) is June (11.4mph).
The calmest month (with the lowest average wind speed) is November (8mph).
Average humidity in September
Barstow, TX
- Average humidity in September: 46%
The month with the highest relative humidity is December (47%).
The month with the lowest relative humidity is April (26%).
Average rainfall in September
Barstow, TX
- Average rainfall in September: 1.22"
The wettest month (with the highest rainfall) is September (1.22").
The driest month (with the least rainfall) is February (0.16").
Average rainfall days in September
Barstow, TX
- Average rainfall days in September: 9.6 days
The month with the highest number of rainy days is September (9.6 days).
The month with the least rainy days is February (2.3 days).
Average snowfall in September
Barstow, TX
- Average snowfall in September: 0"
The month with the highest snowfall is December (0.75").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Barstow, TX
- 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
Barstow, TX
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 12min).
The month with the shortest days is December (Average daylight: 10h and 6min).
- Average sunshine in September: 9h and 1min
The month with the most sunshine is June (Average sunshine: 11h and 54min).
The month with the least sunshine is December (Average sunshine: 7h and 0min).
Average sunshine days in September
Barstow, TX
- Average sunshine days in September: 18 days
The month with the most sunshine days is January (27.2 days).
The month with the least sunshine days is September (18 days).
Average UV index in September
Barstow, TX
- Average UV index in September: 6
The months with the highest UV index are June and July (UV index 8).
The month with the lowest UV index is December (UV index 3).
Average cloud cover in September
Barstow, TX
- Average cloud cover in September: 20
The months with the most cloud cover are September and December (Cloud cover 20).
The month with the least cloud cover is June (Cloud cover 11).
Average visibility in September
Barstow, TX
- 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).
Barstow, Texas, USA
Weather forecast for your location
2. Allow the app to use your location
