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
A subtle shift in Fort Irwin's weather is observed as August turns into September, with the average high temperature reducing from a very hot 97.3°F (36.3°C) to a tropical 89.8°F (32.1°C). September witnesses an average low-temperature hovering around an agreeable 69.1°F (20.6°C).Humidity
The average relative humidity in September is 25%.Rainfall
In Fort Irwin, during September, the rain falls for 2.8 days and regularly aggregates up to 0.16" (4mm) of precipitation. In Fort Irwin, during the entire year, the rain falls for 39 days and collects up to 3.27" (83mm) of precipitation.Snowfall
In Fort Irwin, snow does not fall in February through December.Daylight
In Fort Irwin, the average length of the day in September is 12h and 23min.On the first day of the month, sunrise is at 6:19 am and sunset at 7:13 pm. On the last day of September, in Fort Irwin, sunrise is at 6:41 am and sunset at 6:31 pm PDT.
Sunshine
In September, the average sunshine is 10.6h.UV index
The average daily maximum UV index in September in Fort Irwin is 6. A UV Index of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV rays for ordinary individuals.Note: In September, a daily UV index of 6 turns into the following recommendations:
Stand by precautions and apply sun safety measures. Evading sunburn is of great importance. Limit direct sun exposure and seek shade between 10 a.m. and 4 p.m., the time of the most intense UV radiation, noting that shade structures may not provide total sun protection. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot does it get in Fort Irwin in September?
What is the average humidity in September in Fort Irwin?
How much does it rain in Fort Irwin in September?
When it does not snow in Fort Irwin?
What is the average length of the day in September in Fort Irwin?
When are sunrise and sunset in September in Fort Irwin?
How long on average sun shines in September in Fort Irwin?
What is the UV index reading in September in Fort Irwin?
Average temperature in September
Fort Irwin, CA
- Average high temperature in September: 89.8°F
The warmest month (with the highest average high temperature) is July (98.2°F).
The month with the lowest average high temperature is December (55°F).
- Average low temperature in September: 69.1°F
The month with the highest average low temperature is August (74.7°F).
The coldest month (with the lowest average low temperature) is December (40.1°F).
Average pressure in September
Fort Irwin, 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 (29.79"Hg).
Average wind speed in September
Fort Irwin, CA
- Average wind speed in September: 8mph
The windiest month (with the highest average wind speed) is May (11.7mph).
The calmest month (with the lowest average wind speed) is January (6mph).
Average humidity in September
Fort Irwin, CA
- Average humidity in September: 25%
The month with the highest relative humidity is December (47%).
The month with the lowest relative humidity is August (21%).
Average rainfall in September
Fort Irwin, CA
- Average rainfall in September: 0.16"
The wettest month (with the highest rainfall) is December (0.51").
The driest month (with the least rainfall) is June (0.04").
Average rainfall days in September
Fort Irwin, CA
- Average rainfall days in September: 2.8 days
The month with the highest number of rainy days is December (4.6 days).
The month with the least rainy days is June (0.6 days).
Average snowfall in September
Fort Irwin, CA
- Average snowfall in September: 0"
The month with the highest snowfall is January (0.04").
The months with the least snowfall are February, March, April, May, June, July, August, September, October, November and December (0").
Average snowfall days in September
Fort Irwin, CA
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January and December (0.3 days).
The months with the least snowfall days are February, March, April, May, June, July, August, September, October and November (0 days).
Average daylight in September /
Average sunshine in September
Fort Irwin, 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 48min).
- 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
Fort Irwin, CA
- Average sunshine days in September: 26 days
The month with the most sunshine days is June (29 days).
The month with the least sunshine days is February (23.5 days).
Average UV index in September
Fort Irwin, CA
- Average UV index in September: 6
The months with the highest UV index are June and July (UV index 8).
The months with the lowest UV index are November and December (UV index 3).
Average cloud cover in September
Fort Irwin, CA
- Average cloud cover in September: 5
The month with the most cloud cover is December (Cloud cover 18).
The month with the least cloud cover is June (Cloud cover 4).
Average visibility in September
Fort Irwin, 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).
Fort Irwin, California, USA
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