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 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
September heralds a minor drop in average high-temperature, sliding from August's extremely hot 106.2°F (41.2°C) to a fiery hot 99.1°F (37.3°C). Imperial's temperature tends to fall to an average low of 79.9°F (26.6°C) during the nights of September.Humidity
In Imperial, California, the average relative humidity in September is 26%.Rainfall
The months with the most rainfall in Imperial are March, April, July through September and December, with an average 0.08" (2mm) of precipitation.Daylight
In Imperial, the average length of the day in September is 12h and 22min.On the first day of the month, sunrise is at 6:17 am and sunset at 7:06 pm. On the last day of September, in Imperial, sunrise is at 6:36 am and sunset at 6:27 pm PDT.
Sunshine
In September, the average sunshine is 10.2h.UV index
In Imperial, the average daily maximum UV index in September is 8. A UV Index estimate of 8 to 10 represents a very high health hazard from exposure to the Sun's UV rays for average individuals.Note: The maximum daily UV index of 8 in September converts into the following recommendations:
Be proactive in protecting yourself; skin and eyes can be harmed if left unprotected. Make an effort to avoid direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation, and note that objects like parasols or canopies might not offer full sun protection. Always opt for UVA and UVB-resistant sunglasses on radiant days.
Frequently asked questions
How hot does it get in Imperial in September?
What is the average humidity in September in Imperial?
What is the rainiest month in Imperial?
How many days does it rain in September in Imperial?
What is the average length of the day in September in Imperial?
When are sunrise and sunset in September in Imperial?
How long on average sun shines in September in Imperial?
What is the UV index reading in September in Imperial?
Average temperature in September
Imperial, CA
- Average high temperature in September: 99.1°F
The warmest month (with the highest average high temperature) is July (106.7°F).
The month with the lowest average high temperature is December (66.4°F).
- Average low temperature in September: 79.9°F
The month with the highest average low temperature is August (85.5°F).
The coldest month (with the lowest average low temperature) is January (49.8°F).
Average pressure in September
Imperial, CA
- Average pressure in September: 29.81"Hg
The month with the highest atmospheric pressure is January (30.08"Hg).
The month with the lowest atmospheric pressure is June (29.78"Hg).
Average wind speed in September
Imperial, CA
- Average wind speed in September: 5.8mph
The windiest month (with the highest average wind speed) is April (7.6mph).
The calmest month (with the lowest average wind speed) is January (5.2mph).
Average humidity in September
Imperial, CA
- Average humidity in September: 26%
The month with the highest relative humidity is December (40%).
The month with the lowest relative humidity is June (21%).
Average rainfall in September
Imperial, CA
- Average rainfall in September: 0.08"
The wettest months (with the highest rainfall) are March, April, July, August, September and December (0.08").
The driest months (with the least rainfall) are May and June (0").
Average rainfall days in September
Imperial, CA
- Average rainfall days in September: 1.9 days
The month with the highest number of rainy days is July (2.8 days).
The month with the least rainy days is May (0.3 days).
Average daylight in September /
Average sunshine in September
Imperial, CA
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- Average sunshine in September: 10h and 1min
The month with the most sunshine is June (Average sunshine: 12h and 12min).
The month with the least sunshine is December (Average sunshine: 7h and 6min).
Average sunshine days in September
Imperial, CA
- Average sunshine days in September: 26.6 days
The month with the most sunshine days is May (30.4 days).
The month with the least sunshine days is August (25.8 days).
Average UV index in September
Imperial, CA
- Average UV index in September: 8
The months with the highest UV index are July and August (UV index 9).
The month with the lowest UV index is December (UV index 4).
Average cloud cover in September
Imperial, CA
- Average cloud cover in September: 6
The month with the most cloud cover is December (Cloud cover 17).
The month with the least cloud cover is June (Cloud cover 4).
Average visibility in September
Imperial, 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).
Imperial, California, USA
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