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
September signifies a minor drop in average high-temperature, transitioning from a torrid 95.2°F (35.1°C) in August to a tropical 89.2°F (31.8°C). A marked drop from daytime peak temperatures to an average low-temperature of 60.8°F (16°C) is observed during the nights in September in Gridley, California.Humidity
The average relative humidity in September is 36%.Rainfall
In Gridley, in September, during 2.1 rainfall days, 0.24" (6mm) of precipitation is typically accumulated. Throughout the year, there are 81.5 rainfall days, and 21.34" (542mm) of precipitation is accumulated.Snowfall
March through December are months without snowfall.Daylight
In Gridley, the average length of the day in September is 12h and 26min.On the first day of September, sunrise is at 6:36 am and sunset at 7:37 pm. On the last day of the month, sunrise is at 7:02 am and sunset at 6:50 pm PDT.
Sunshine
In Gridley, the average sunshine in September is 11.2h.UV index
The average daily maximum UV index in September in Gridley is 5. A UV Index reading of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The average daily UV index of 5 in September transforms into the following instructions:
Be mindful. Individuals with a lighter skin tone may suffer burns in less than 30 minutes. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. To cut down UV radiation exposure by about half, sport a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot does it get in Gridley in September?
What is the average humidity in September in Gridley?
How much does it rain in Gridley in September?
When it does not snow in Gridley?
What is the average length of the day in September in Gridley?
When is the sunrise / sunset in September in Gridley?
How many hours of sunshine does Gridley have in September?
What is the UV index reading in September in Gridley?
Average temperature in September
Gridley, CA
- Average high temperature in September: 89.2°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 (54.5°F).
- Average low temperature in September: 60.8°F
The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is December (41°F).
Average pressure in September
Gridley, CA
- Average pressure in September: 29.92"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in September
Gridley, CA
- Average wind speed in September: 4.7mph
The windiest month (with the highest average wind speed) is March (6.1mph).
The calmest month (with the lowest average wind speed) is September (4.7mph).
Average humidity in September
Gridley, CA
- Average humidity in September: 36%
The month with the highest relative humidity is March (72%).
The month with the lowest relative humidity is July (35%).
Average rainfall in September
Gridley, CA
- Average rainfall in September: 0.24"
The wettest months (with the highest rainfall) are February and March (3.98").
The driest month (with the least rainfall) is July (0.04").
Average rainfall days in September
Gridley, CA
- Average rainfall days in September: 2.1 days
The month with the highest number of rainy days is March (14.3 days).
The month with the least rainy days is July (1.4 days).
Average snowfall in September
Gridley, CA
- Average snowfall in September: 0"
The month with the highest snowfall is January (0.4").
The months with the least snowfall are March, April, May, June, July, August, September, October, November and December (0").
Average snowfall days in September
Gridley, CA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is December (0.1 days).
The months with the least snowfall days are January, February, March, April, May, June, July, August, September, October and November (0 days).
Average daylight in September /
Average sunshine in September
Gridley, CA
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in September: 11h and 1min
The month with the most sunshine is July (Average sunshine: 12h and 12min).
The month with the least sunshine is December (Average sunshine: 5h and 54min).
Average sunshine days in September
Gridley, CA
- Average sunshine days in September: 27 days
The month with the most sunshine days is July (29.1 days).
The month with the least sunshine days is March (16 days).
Average UV index in September
Gridley, CA
- Average UV index in September: 5
The months with the highest UV index are June, July and August (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in September
Gridley, CA
- Average cloud cover in September: 8
The month with the most cloud cover is March (Cloud cover 37).
The month with the least cloud cover is July (Cloud cover 4).
Average visibility in September
Gridley, 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).
Gridley, California, USA
Weather forecast for your location
2. Allow the app to use your location