United StatesAverage weather for Barstow in September
It's hot in September in Barstow with an average temperature of 35°C. Temperatures this month range from a low of 32°C to a high of 38°C. At night, you can expect temperatures between 16°C and 22°C.
Start of September
The month of September starts in Barstow with hot temps, averaging around 37°C during the day and nights around 22°C. No precipitation expected at the start of the month; it’ll be sunny. Light clothing like shorts or a dress, and a hat and sunglasses are perfect.
Mid September
By mid-September, daytime temps drop to around 35°C, with nights around 19°C. No precipitation expected during this period, so you can enjoy plenty of sunshine.
End of September
By the end of September, the average daytime temperature in Barstow is around 33°C, while nighttime temps are about 18°C. No precipitation expected at the end of the month; it’ll be mostly sunny.
Because temperatures drop in the evening, wearing layers is recommended.
According to weather history, there is only 2,1 mm of precipitation in September. The wind speed is around 4 Bft, mostly coming from the West.
Barstow in September |
New York | ||
|---|---|---|---|
 Average temperature |
35°C | 27°C | |
 Max. temperature |
38°C | 31°C | |
| Min. temperature |
32°C | -5°C | |
 Total precipitation |
2,1 mm | 57 mm | |
| Rainy days |
1 day | 9 days | |
August
UV index
The UV index is a maximum of 9 this month. That's a very high value on the intensity scale of 1 to 11. Unprotected skin can burn within 10-15 minutes.
Is September a good time to visit Barstow?
September is an awesome month to be in Barstow for sunny weather. You’ll have high temperatures and not much chance of rain this month.
Temperature records
With 44°C in 2020, Barstow reached the highest temperature in September over the past 10 years. The lowest daytime temperature in this month was 21°C in 2023. The extreme nighttime temperatures ranged from a lowest recorded value of 1°C to a highest value of 29°C.
Check out the climate of Barstow for all months and discover the best travel time
Daily Temperature in September in Barstow
This chart shows the average daily high and low temperatures in September for Barstow, in degrees Celsius. The red line represents the highs, and the blue line shows the lows. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, provide the average temperatures for this month.
Daily Precipitation in September in Barstow
The chart below shows the average daily precipitation in September for Barstow, measured in millimeters over the past few years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are listed at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that it rained more often. But remember, it’s just an average, and every day can be different. Based on historical weather data for September, you can expect about 1 day of precipitation in Barstow.
Daily UV index in September in Barstow
This chart shows the average daily UV index in September in Barstow, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Temperature in September in Barstow over the years
This chart shows the average temperature in September in Barstow, measured in degrees Celsius, over the past few years.
Total precipitation in September in Barstow over the years
This chart shows the average precipitation in September in Barstow, measured in millimeters over the past years. Precipitation is always measured as water, whether it’s snow or hail.
Daily weather in September for Barstow
Click on any day in September to get detailed info about the usual weather on that day in Barstow. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in September in Barstow
Have you been to Barstow in September?
Share your weather experience in September in Barstow.
Average weather in Barstow by month
Click on a month below to see detailed weather info for Barstow. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
