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
The arrival of September signals a subtle shift in temperature, down from a torrid 103.6°F (39.8°C) in August to a still very hot 96.8°F (36°C). An average nighttime temperature of 79.9°F (26.6°C) is witnessed throughout September.Humidity
In September, the average relative humidity is 25%.Rainfall
In Big River, in September, it is raining for 4.8 days, with typically 0.43" (11mm) of accumulated precipitation. Throughout the year, there are 39.4 rainfall days, and 3.9" (99mm) of precipitation is accumulated.Daylight
In September, the average length of the day is 12h and 22min.On the first day of the month, sunrise is at 6:11 am and sunset at 7:02 pm. On the last day of September, sunrise is at 6:31 am and sunset at 6:22 pm PDT.
Sunshine
In Big River, the average sunshine in September is 9.8h.UV index
In September, the average daily maximum UV index is 7. A UV Index of 6 to 7 symbolizes a high threat to health from unprotected exposure to Sun's UV rays for the ordinary person.Note: A maximum daily UV index of 7 during September morphs into the following directions:
Sustain precautions and conform to sun safety norms. Preventing sunburn is necessary. 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 does it get in Big River in September?
What is the average humidity in September in Big River?
How many days does it rain in September in Big River?
What is the average length of the day in September in Big River?
What time are sunrise and sunset in September in Big River?
How many hours of sunshine does Big River have in September?
What is the UV index intensity in September in Big River?
Average temperature in September
Big River, CA
- Average high temperature in September: 96.8°F
The warmest month (with the highest average high temperature) is July (104.2°F).
The month with the lowest average high temperature is December (61.2°F).
- Average low temperature in September: 79.9°F
The month with the highest average low temperature is August (85.6°F).
The coldest month (with the lowest average low temperature) is December (47.1°F).
Average pressure in September
Big River, CA
- Average pressure in September: 29.81"Hg
The month with the highest atmospheric pressure is January (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.74"Hg).
Average wind speed in September
Big River, CA
- Average wind speed in September: 6.5mph
The windiest month (with the highest average wind speed) is April (8.5mph).
The calmest month (with the lowest average wind speed) is November (5.8mph).
Average humidity in September
Big River, CA
- Average humidity in September: 25%
The months with the highest relative humidity are January and December (39%).
The month with the lowest relative humidity is June (15%).
Average rainfall in September
Big River, CA
- Average rainfall in September: 0.43"
The wettest month (with the highest rainfall) is July (0.59").
The driest months (with the least rainfall) are May and June (0.04").
Average rainfall days in September
Big River, CA
- Average rainfall days in September: 4.8 days
The month with the highest number of rainy days is July (7.8 days).
The month with the least rainy days is May (1.2 days).
Average daylight in September /
Average sunshine in September
Big River, CA
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in September: 9h and 5min
The month with the most sunshine is June (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 7h and 0min).
Average sunshine days in September
Big River, CA
- Average sunshine days in September: 23 days
The month with the most sunshine days is May (29.3 days).
The month with the least sunshine days is July (20.2 days).
Average UV index in September
Big River, CA
- Average UV index in September: 7
The month with the highest UV index is July (UV index 9).
The month with the lowest UV index is December (UV index 3).
Average cloud cover in September
Big River, CA
- Average cloud cover in September: 7
The month with the most cloud cover is December (Cloud cover 19).
The month with the least cloud cover is June (Cloud cover 5).
Average visibility in September
Big River, 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).
Big River, California, USA
Weather forecast for your location
2. Allow the app to use your location
