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
With the arrival of September, Barstow notices a mild change in the average high-temperature, sliding from August's sweltering 95.4°F (35.2°C) to a tropical 88.3°F (31.3°C). Barstow experiences an average temperature drop to a refreshing 67.3°F (19.6°C) during September nights.Humidity
The average relative humidity in September in Barstow is 27%.Rainfall
In Barstow, in September, it is raining for 1.9 days, with typically 0.08" (2mm) of accumulated precipitation. In Barstow, during the entire year, the rain falls for 36.5 days and collects up to 3.11" (79mm) of precipitation.Snowfall
February through October and December are months without snowfall.Daylight
In September, the average length of the day is 12h and 23min.On the first day of September in Barstow, sunrise is at 6:21 am and sunset at 7:14 pm. On the last day of the month, sunrise is at 6:42 am and sunset at 6:32 pm PDT.
Sunshine
In Barstow, the average sunshine in September is 10.7h.UV index
The average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high threat to health from unsafe exposure to UV radiation for the average person.Note: A maximum daily UV index of 6 during September morphs into the following directions:
Undertake protective measures and comply with sun safety rules. Shielding against skin and eye damage is essential. During the period from 10 a.m. to 4 p.m., UV radiation is highest. Try to avoid direct sunlight during these hours. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat.
Frequently asked questions
How hot is it in Barstow in September?
What is the average humidity in September in Barstow?
How much does it rain in Barstow in September?
When it does not snow in Barstow?
How many hours of daylight does Barstow have in September?
When are sunrise and sunset in September in Barstow?
How many hours of sunshine does Barstow have in September?
What is the UV index intensity in September in Barstow?
Average temperature in September
Barstow, CA
- Average high temperature in September: 88.3°F
The warmest month (with the highest average high temperature) is July (96.4°F).
The month with the lowest average high temperature is December (54.3°F).
- Average low temperature in September: 67.3°F
The month with the highest average low temperature is August (72.9°F).
The coldest month (with the lowest average low temperature) is December (38.7°F).
Average pressure in September
Barstow, CA
- Average pressure in September: 29.85"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.81"Hg).
Average wind speed in September
Barstow, CA
- Average wind speed in September: 8.6mph
The windiest month (with the highest average wind speed) is May (12.6mph).
The calmest month (with the lowest average wind speed) is January (6.3mph).
Average humidity in September
Barstow, CA
- Average humidity in September: 27%
The months with the highest relative humidity are January and December (48%).
The month with the lowest relative humidity is August (23%).
Average rainfall in September
Barstow, CA
- Average rainfall in September: 0.08"
The wettest month (with the highest rainfall) is December (0.55").
The driest month (with the least rainfall) is June (0").
Average rainfall days in September
Barstow, CA
- Average rainfall days in September: 1.9 days
The month with the highest number of rainy days is December (5.6 days).
The month with the least rainy days is June (0.2 days).
Average snowfall in September
Barstow, CA
- Average snowfall in September: 0"
The month with the highest snowfall is November (0.39").
The months with the least snowfall are February, March, April, May, June, July, August, September, October and December (0").
Average snowfall days in September
Barstow, CA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (0.4 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, CA
- 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 54min).
- Average sunshine in September: 10h and 4min
The months with the most sunshine are June, July and August (Average sunshine: 12h and 6min).
The month with the least sunshine is January (Average sunshine: 7h and 6min).
Average sunshine days in September
Barstow, CA
- Average sunshine days in September: 27.5 days
The month with the most sunshine days is June (29.8 days).
The month with the least sunshine days is February (22.8 days).
Average UV index in September
Barstow, CA
- Average UV index in September: 6
The month with the highest UV index is July (UV index 8).
The months with the lowest UV index are November and December (UV index 3).
Average cloud cover in September
Barstow, CA
- Average cloud cover in September: 5
The month with the most cloud cover is December (Cloud cover 19).
The months with the least cloud cover are June, August and September (Cloud cover 5).
Average visibility in September
Barstow, CA
- 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, California, USA
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